Door-stopping Device Holding Position Precision
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Solution Overview
Problem
Existing door stop devices impose significant relative movement between the articulated arm and the locking mechanism, leading to reduced precision in holding positions due to the use of a blocking roller with an axis that transmits forces, resulting in twice the displacement and leverage, which penalizes the precision of the holding position.
Innovation Solution
The solution involves a door stop device with a blocking element that directly acts on the articulated arm, utilizing a mobile carriage with inclined ramps for maintaining the blocking element in the unlocked position, and elastic return means that push the blocking element into notches on the connecting arm, allowing for multiple locking positions with reduced relative sliding resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a blocking roller with an axis is used to transmit forces between the articulated arm and locking mechanism, then the locking mechanism can maintain the door in unlocked position, but the articulated arm performs a displacement equal to twice the displacement of the locking roller axis, which penalizes the precision of the holding position
Solution Approach 1:
The invention extracts the axis of the locking roller from the system, replacing it with a blocking element that acts directly on the articulated arm. This eliminates the intermediate transmission step that caused the displacement multiplication, thereby resolving the contradiction between ease of operation and holding position precision.
Solution Approach 2:
The blocking element serves multiple functions: it maintains the door in unlocked position by resting on the articulated arm, and it directly transmits forces without the intermediate roller axis. This multi-functional design eliminates the precision penalty while maintaining operational ease.
2Device complexity
If the blocking element is movably mounted on the locking mechanism in a direction perpendicular to the connecting arm, then the locking mechanism can be simplified by eliminating the roller axis, but the blocking element requires additional movement freedom
Solution Approach 1:
The blocking element is designed with movable mounting that allows it to adapt its position dynamically. It can move perpendicular to the connecting arm to engage with notches for locking, and move parallel to the connecting arm to maintain contact during unlocked operation. This dynamic adaptability simplifies the overall mechanism while providing the necessary movement freedom.
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
This design enhances the precision of the door stop device by minimizing the relative movement between the connecting arm and the locking mechanism, allowing for precise locking in multiple positions with reduced effort required for unlocking and re-locking, thus improving the overall functionality and usability.
Implementation Method 1
said locking mechanism integrating at least one blocking element bearing on said connecting arm, as well as elastic return means intended to push back the blocking element and said connecting arm bearing against each other
Implementation Method 2
said mobile carriage slides along the connecting arm on which it is mounted while offering a certain resistance to movement
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention relates to a door-stopping device comprising a connecting arm (1) and a locking mechanism (2), one being secured to the door leaf, and the other to the frame, said connecting arm (1) comprising at least one face provided with a plurality of successive notches (11), in each of which a blocking element (21) can be housed, said blocking element being subjected to the effect of elastic return means (22), while a mobile carriage (3) can slide along the connecting arm (1) on which it is mounted, at the same time providing a certain resistance to movement. Said mobile carriage (3) comprises inclined ramps (32) for holding the blocking element (21) outside the notches (11) during the phases during which the door-locking device is in the unlocked mode. The device according to the invention is particularly applicable to motor vehicle doors.