Commercial Vehicle Door Stop With Integrated Contact Element
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Solution Overview
Problem
Existing door stops for commercial vehicles are complex and expensive due to numerous moving parts, which can lead to damage from rubbing or contact with vehicle parts during operation.
Innovation Solution
A door stop design featuring a holding arm with a rigid contact element that can be moved to a position parallel to the door, allowing a locking tongue to engage, providing a secure fixation without additional locking means, thus preventing contact and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If door stops with spring-loaded locking levers and multiple moving parts are used, then the door can be securely held in the open position, but the device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent combines the holding arm and contact element into a single integrated component that performs both the support function and the locking function. The holding arm is directly connected to the contact element, eliminating the need for separate spring-loaded locking levers and multiple moving parts while maintaining secure door holding capability.
Solution Approach 2:
The patent removes the complex spring-loaded locking mechanism and extracts only the essential functions needed for door holding. The simplified design uses a basic pivoting holding arm with a contact element that engages with the door edge, eliminating unnecessary moving parts while preserving the core functionality.
2Adaptability or versatility
If door stops with multiple moving parts are used, then the door can be secured in various positions, but the weight and manufacturing cost increase
Solution Approach 1:
The patent merges the positioning function into the simple pivoting motion of the holding arm itself. The arm can rotate to accommodate different door angles, and the contact element maintains engagement throughout the range of motion, providing adaptability without adding weight through complex adjustment mechanisms.
3Reliability
If door stops with sharp-edged parts are used, then the door can be effectively locked, but damage to vehicle parts may occur
Solution Approach 1:
The patent applies a rubber buffer coating specifically to the contact element, which is the only part that directly contacts the door. This localized soft coating maintains the structural integrity and locking effectiveness of the rigid holding arm while preventing damage to the door and vehicle parts through the cushioning effect of the rubber material.
4Reliability
If complex door stops with many moving parts are used, then the door can be securely held, but maintenance requirements and production costs increase
Solution Approach 1:
The patent combines multiple functions into the single holding arm component, which can be manufactured as one piece or pre-assembled unit. This eliminates the need for complex assembly of multiple moving parts, reducing production costs and simplifying manufacturing while maintaining secure door holding through the integrated contact element and pivoting mechanism.
Data Source
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AI summary
The present invention relates to a door stay (50, 50') designed to hold a door (20, 21) of a commercial vehicle body (15), such as a trailer (5), in the open position. The door stay (50, 50') comprises a retaining arm (52) that can be movably attached to a component of the commercial vehicle (5) at at least one bearing point (53), and a contact element (51) rigidly connected to the retaining arm (52). The door stay (50, 50') can be positioned by moving it from a rest position to a working position, in which the contact element (51) is arranged substantially parallel to the door (20, 21) to be held and serves as a contact surface and fixing point for the door (20, 21) at a defined distance from a commercial vehicle component.