Quick-Release Automotive Check Strap With Spring-Latched Pivot
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Solution Overview
Problem
Existing vehicle door check straps are time-consuming to detach from the vehicle body, especially in removable door designs.
Innovation Solution
A removable check strap assembly featuring a bracket, check strap with a pivot pin and retention spring, and spring-biased retention members, allowing for quick detachment by manipulating the pivot pin or push-button mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional check strap is used to attach the door to the vehicle body, then the door can be securely positioned, but the detachment process is time-consuming
Solution Approach 1:
The check strap incorporates a dynamic release mechanism with spring-biased retention members that can quickly transition from a locked to an unlocked state. When the button is actuated, the spring forces the retention members to retract, allowing the pivot pin to be rapidly removed from the bracket, thus enabling quick detachment while maintaining secure positioning during normal operation
Solution Approach 2:
The spring-biased retention members automatically engage with the pivot pin to secure it in place without requiring additional fastening actions. The spring force ensures continuous engagement pressure, and the mechanism self-latches upon insertion, eliminating the need for manual tightening or multiple securing steps while maintaining reliable attachment
2Reliability
If a secure attachment mechanism is used to hold the door, then the door remains firmly attached, but the mechanism becomes complex and difficult to operate
Solution Approach 1:
The release function is extracted and concentrated into a single button actuator that triggers the spring-biased retention members. This simplifies the user interface to a single obvious action (pressing the button) while the complex spring mechanism handles the secure release internally, making the system both secure and easy to operate
Solution Approach 2:
The spring-biased retention members act as intermediaries between the button actuator and the pivot pin. When the button is pressed, the springs mediate the force transmission to retract the retention members, providing a smooth and controlled release mechanism that is both secure during attachment and easy to release when needed
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 rapid and secure attachment and detachment of vehicle doors, reducing installation and removal time while maintaining door positioning.
Implementation Method 1
a retention spring including a proximate end attached to the head of the pivot pin and a distal end configured to mate with the shank
Implementation Method 2
spring-biased retention members, when in the extended position, lock the shank of the pivot pin relative to the bushing
Data Source
AI summary
A removable check strap assembly for a vehicle having a vehicle body and a vehicle door. The check strap assembly includes a bracket configured to be attached to the vehicle body; a check strap including a first end configured to be attached to the vehicle door and a second end defining an opening configured to be attached to the bracket; a pivot pin having a head and a shank, the opening of the second end of the check strap being configured to receipt of the shank of the pivot pin; and a retention spring including a proximate end attached to the head of the pivot pin and a distal end configured to mate with the shank. The bracket includes a notch configured for receipt of retention spring, and the distal end of the retention spring includes a key-hole shaped opening configured for receipt of the shank of the pivot pin.