Vehicle Door Release Flap Coupling via Coaxial Pins
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Solution Overview
Problem
Conventional door release apparatuses for vehicles suffer from unreliable coupling of protective flaps, leading to accidental disengagement and potential loss, which compromises the protection of key-operated mechanisms and causes inconvenience.
Innovation Solution
A release apparatus featuring a base structure and handle assembly with a rotatable flap, secured by coaxially inserted pins and a helical spring, ensuring stable coupling and automatic return to protection position, while allowing controlled access to key-operated mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the flap is coupled to the handle assembly by interlocking tabs and seats, then the flap can rotate between protected and accessible positions, but the coupling becomes unreliable and the flap may accidentally disengage after repeated use or stress
Solution Approach 1:
A retainer component is introduced as an intermediary element between the flap and handle assembly. The retainer includes a body with a slot that receives the flap tab, and a protrusion that engages with a seat on the handle assembly, thereby mediating the connection and preventing direct disengagement between flap and handle
Solution Approach 2:
The simple interlocking tab-seat mechanical system is replaced with a more sophisticated retainer-based mechanism that includes a slot-protrusion engagement system combined with elastic retention, providing more reliable coupling while maintaining rotational functionality
2Reliability
If the flap is securely coupled to prevent accidental removal, then reliability improves, but the ease of installation and disassembly decreases
Solution Approach 1:
The retainer is designed with dynamic characteristics through the elastic element that allows the protrusion to be compressed and released. This enables easy installation by simply inserting the flap tab into the slot, while the elastic force automatically secures the coupling, and allows easy disassembly by compressing the elastic element to release the protrusion from its seat
3Reliability
If the flap remains in the protected configuration, then protection of key-operated mechanisms is maximized, but access to the mechanism requires active user intervention
Solution Approach 1:
The flap is designed as a dynamic component that can rotate between protected and accessible positions. The retainer mechanism allows controlled rotation when the user intentionally moves the flap, while maintaining automatic return to the protected position through the elastic element, thereby balancing protection with controlled access
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
The apparatus provides enhanced protection against accidental removal of the flap, ensures reliable operation, and allows for easy installation and disassembly, maintaining the flap in a protected configuration until voluntary user intervention.
Implementation Method 1
The pins are kept inserted in the holes and in the slots by the elastic axial reaction developed by a helical spring, wound coaxially around the pins
Data Source
AI summary
A release apparatus for doors of vehicles, of the type of vans, trucks, lorries, semi-trailer trucks, trailers and the like, which comprises a base structure (2) which can be stably coupled to the door and a handle assembly (3), which can in turn be associated with respective means of anchoring to the frame of the vehicle. The handle assembly (3) is rotatable with respect to the structure (2) between at least one locked configuration, in which the anchoring means can be engaged with the frame of the vehicle, and at least one released configuration, in which the anchoring means are disengaged from the frame of the vehicle, in order to allow the free rotation of the door. Furthermore, the handle assembly (3) is rotatably coupled, by way of a respective articulation device (4), to a flap (5), which rotates between a first angular position, for covering an element to be protected, of the type of a key-operated mechanism (6), a button, and the like, and at least one second angular position, for free access to the element. The articulation device (4) comprises two pins (7a, 7b), which are coaxially inserted, so that they can rotate, in respective mutually opposite holes (8) defined by the flap (5), and which are likewise coaxially detachably inserted by interlocking in respective mutually opposite slots (9) of matching shape, which face toward and are proximate to corresponding holes (8) and are defined in the handle assembly (3). The pins (7a, 7b) are kept inserted in the holes (8) and in the slots (9) by the elastic axial reaction developed by a helical spring (10), wound coaxially around the pins (7a, 7b).