Motor Vehicle Door Handle Deflection Control
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Solution Overview
Problem
Existing outside door handle devices for motor vehicles experience malfunctions due to material expansion caused by temperature and moisture, leading to issues like handle sticking and jamming, as the actuating lever can change length excessively when actuated, exceeding structural loading limits.
Innovation Solution
A support structure with at least one stop is integrated into the handle support, designed as a support rib, which limits the deflection of the actuating lever to a predetermined maximum distance from its axis of rotation, preventing excessive expansion and ensuring functional reliability by absorbing excessive forces and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the actuating lever is mounted with a loose bearing at the first longitudinal end and a fixed bearing at the second longitudinal end, then the handle device allows for easy assembly and basic functionality, but the actuating lever experiences excessive deflection and material expansion leading to handle sticking and jamming
Solution Approach 1:
The patent introduces a stop element that changes the operational parameters of the actuating lever by limiting its deflection range. The stop defines a maximum deflection distance, preventing the lever from exceeding safe operational limits while still allowing sufficient movement for normal operation. This parameter control resolves the contradiction by maintaining ease of assembly while preventing excessive deflection that causes sticking and jamming.
Solution Approach 2:
The stop element acts as a preventive measure that cushions against excessive deflection before it can cause damage. By positioning the stop in advance at a predetermined distance from the axis of rotation, the system prevents the actuating lever from reaching positions that would cause handling sticking, thereby protecting the system from potential failures while maintaining normal operational freedom.
2Adaptability or versatility
If the actuating lever is allowed to deflect freely to compensate for material expansion, then the handle device accommodates temperature and moisture changes, but the lever deflection exceeds structural loading limits causing malfunction
Solution Approach 1:
The stop element controls the deflection parameter of the actuating lever, allowing it to expand and contract within safe limits in response to environmental changes while preventing it from exceeding the structural loading limit. The stop defines a maximum deflection distance that maintains both adaptability and structural integrity.
Solution Approach 2:
The stop element serves as an intermediary between the actuating lever and the excessive deflection that would cause structural failure. It mediates the relationship by allowing necessary movement for environmental adaptation while blocking movement that would exceed strength limits, thus resolving the contradiction between adaptability and structural integrity.
3Ease of operation
If no stop is provided to limit deflection, then the actuating lever has full range of motion for operation, but excessive force causes permanent deformation or destruction of the lever
Solution Approach 1:
The stop element provides beforehand cushioning by being positioned in advance to catch the actuating lever before excessive force can cause permanent deformation. It absorbs and limits the impact of excessive forces while allowing the lever to maintain its full operational range of motion during normal use, thus protecting the lever without restricting legitimate movement.
Solution Approach 2:
The stop modifies the force parameter by limiting the maximum deflection distance, thereby preventing excessive force from causing permanent deformation. It changes the operational parameters by defining a safe range of motion that maintains both ease of operation and resistance to excessive force.
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 solution ensures the functional reliability of the outside door handle device by limiting deflection and preventing structural overload, maintaining perfect functionality and avoiding damage to the actuating lever, while also being cost-effective and compact in design.
Implementation Method 1
The actuating lever can experience a change in length due to material expansion, for example as a result of temperature influences or due to water absorption
Implementation Method 2
The actuating lever can experience a change in length due to material expansion, for example as a result of temperature influences or due to water absorption
Data Source
Figure 1~3
Figure 4~5
Figure 6
AI summary
The invention relates to a door outside handle device for a motor vehicle, comprising a handle carrier (17) that can be fastened to the door inner face (18) and a handle unit (4) which is seated against the door outer face (2) and has an actuating lever (5) that is pivotably mounted about a rotational axis (12), wherein the aim of the invention is to provide an improved door outside handle device, using a simple design and in a cost-effective manner, in which temperature and moisture influences as well as excessive force action do not interfere with the function. Said aim is achieved in that a support structure (21) having at least one stop (22) is arranged in the region of a pivotably mounted first longitudinal end (9) of the actuating lever (5), wherein said support structure limits a deflection of the actuating lever (5) in the longitudinal direction thereof to a maximum predetermined by the distance (23).