Vehicle Door Checker Assembly With Sliding Latch Decoupling
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Solution Overview
Problem
Conventional door checker assemblies for vehicles cause inconvenience due to difficult pin coupling and decoupling operations, especially when opening and closing doors beyond a predetermined angle, and suffer from dimensional tolerance issues.
Innovation Solution
A door checker assembly with a sliding-type locking latch that allows decoupling of the checker arm from the locking latch at any desired time, featuring a biasing member to maintain the latch in a coupled position and guide surfaces for secure recoupling, preventing unintended rotation and reducing operational friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pin is used to couple the checker arm to the door mounting part, then the door can be securely held at a predetermined angle, but the coupling and decoupling operations become difficult and time-consuming
Solution Approach 1:
The locking latch is designed to be movable between a locked position (where it restrains the pin) and an unlocked position (where it releases the pin). This dynamic mechanism allows the user to easily switch between coupled and decoupled states by sliding the latch, eliminating the need for complex alignment and manual insertion/removal operations while maintaining secure holding when locked
Solution Approach 2:
The locking latch acts as an intermediary component between the pin and the door mounting part. It provides a simple sliding operation for the user while simultaneously ensuring reliable restraint of the pin when in the locked position, thus mediating between ease of operation and secure coupling
2Adaptability or versatility
If the door is opened beyond a predetermined maximum angle, then greater accessibility is achieved, but the pin must be removed and reinserted which causes inconvenience
Solution Approach 1:
The movable locking latch enables rapid transition between locked and unlocked states. When the user needs to open the door beyond the predetermined angle, they can quickly slide the latch to unlock it, open the door to the desired angle, and then slide the latch back to lock it - all without the time-consuming process of removing and reinserting a pin
3Reliability
If dimensional tolerances are tight between the pin and pin holes, then secure coupling is achieved, but resistance during pin removal increases making operation difficult
Solution Approach 1:
The locking latch extracts the function of restraining the pin from the pin-hole interface itself. By providing a separate locking mechanism that positively engages with the pin, the system maintains secure coupling through the latch rather than relying solely on tight dimensional tolerances between the pin and pin holes, thereby eliminating the resistance problem during removal operations
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
Enhances user convenience by allowing pin decoupling at any desired time and stable recoupling, regardless of the door's opening angle, improving the overall operation efficiency and reducing friction-related difficulties.
Implementation Method 1
a biasing member configured to bias the locking latch in the coupled position with the checker arm
Implementation Method 2
guide surfaces for secure recoupling, preventing unintended rotation and reducing operational friction
Data Source
AI summary
A door checker assembly can be implemented for a vehicle. The assembly includes a vehicle body mounting part configured to be mounted on a vehicle body of the vehicle, a door mounting part configured to be mounted on a door of the vehicle, a checker arm configured to pass through the vehicle body mounting part and be movable relative to the vehicle body mounting part, and a locking latch mounted on the door mounting part to be slidably movable between a latch position at which the locking latch is coupled to the checker arm and a release position at which the locking latch is decoupled from the checker arm.