Door Handle Actuation Lever Translational Movement Mechanism
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Solution Overview
Problem
Existing door handle systems that transition from a closed to an actuated position for manual operation are structurally complex and require significant space, particularly in vertical directions, making them unsuitable for compact applications like automobile doors.
Innovation Solution
A door handle system utilizing an actuation lever and slotted guides, where the actuation lever is pivotably connected to a mounting section and a housing section, allowing for translational movement between closed and actuated positions without pivoting, and incorporating spring means for automatic return and preloading to ensure secure closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a door handle is designed to terminate flush with the exterior skin and move translationally from closed to actuated position, then the aesthetic appearance and compactness are improved, but the structural complexity and space requirements increase
Solution Approach 1:
The door handle system is divided into separate functional components: the handle body, actuation lever, unlocking lever, drive part, thrust rod, and blocking element. Each component has a specific function and can be independently designed and assembled, reducing overall structural complexity while achieving the flush termination design
Solution Approach 2:
The patent introduces a translational movement mechanism instead of traditional rotational pivoting. The actuation lever moves in a linear path guided by slotted guides, converting rotational actuation into translational handle movement. This dimensional change enables flush termination while simplifying the mechanical linkage requirements
2Shape
If a door handle is designed to move translationally from closed to actuated position, then the aesthetic appearance is improved, but the space requirement particularly in vertical direction increases
Solution Approach 1:
The patent employs a nested arrangement where the actuation lever, drive part, and thrust rod are arranged in sequence along the same axis. The blocking element is positioned within the path of the thrust rod, and the unlocking lever is integrated into the handle body structure. This nesting minimizes the vertical space requirement while enabling the full translational movement sequence
Solution Approach 2:
By changing from rotational to translational movement, the patent reduces the vertical space requirement. The slotted guides constrain the actuation lever to move in a compact linear path, and the thrust rod transfers this motion efficiently to the blocking element with minimal vertical travel distance
3Ease of operation
If spring means are added for automatic return and preloading, then the ease of operation and secure closure are improved, but the device complexity increases
Solution Approach 1:
The spring means are configured to automatically return the actuation lever to its initial position after actuation, and to preload the blocking element into engagement with the unlocking lever. This self-service mechanism eliminates the need for additional actuators or control systems, maintaining simplicity while achieving automatic return and secure closure functions
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 system achieves a more compact design with reduced structural depth and height, enabling door handles to be moved efficiently between positions while ensuring secure locking and easy manual operation, with enhanced stability and safety features like emergency unlocking.
Implementation Method 1
spring means which preloads the actuation lever into the initial position
Implementation Method 2
spring means for preloading the actuation lever into the initial position
Data Source
AI summary
An example door handle system, includes a handle, an actuation lever, a first spring, and an unlocking lever. The handle includes a first mounting section and a second mounting section. The first mounting section is opposite the second mounting section. The actuation lever is pivotably connected to the first mounting section. The first spring is engaged with the actuation lever and the first mounting section to urge the handle to pivot in a first rotational direction relative to the actuation lever. The unlocking lever is pivotably connected to the second mounting section.