Bezel-Type Door Handle Lever Principle Emergency Operation
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Solution Overview
Problem
The existing door handle device, as described in JP 2013-151800 A, faces difficulties in operability during emergency operations due to the high operation load required for push-up operations, especially when the operation member is disposed within a recess.
Innovation Solution
The proposed door handle device includes a bezel-type handle pivotably supported by a base, with one end pivotably supported and the other end capable of outward pivot operation. This handle is connected to a latch mechanism through a traction member, allowing for easy access and operation during emergencies without the need for a dedicated emergency handle, thus reducing the number of parts and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the operation member is disposed in the recess, then the door handle device has a compact structure, but the operability during emergency operation deteriorates due to high operation load
Solution Approach 1:
The door handle device is segmented into two distinct operational components: a push-up operation member disposed in the recess for normal operations, and a separate handle disposed outside the door panel for emergency operations. This segmentation allows each component to be optimized for its specific function, with the external handle providing better operability during emergencies while the recessed structure maintains compactness.
Solution Approach 2:
The handle for emergency operation is moved from the recessed plane to an external position on the door panel surface, utilizing a different spatial dimension. This external handle can pivot outward perpendicular to the door panel, creating a lever arm that reduces operation load while maintaining a compact overall device structure.
2Ease of operation
If a dedicated emergency handle is provided, then the operability of emergency operation is improved, but the number of parts and cost increase
Solution Approach 1:
The handle disposed outside the door panel serves multiple functions: it acts as a decorative bezel element for aesthetic purposes, provides structural support for the door handle device, and functions as the emergency operation mechanism. This multi-functionality eliminates the need for a separate dedicated emergency handle, reducing the number of parts while maintaining improved emergency operability.
Solution Approach 2:
The decorative bezel element and the emergency operation handle are merged into a single component. The bezel-type handle combines aesthetic decoration with emergency door opening functionality, eliminating redundant parts and reducing overall device complexity while maintaining both aesthetic appeal and emergency operability.
3Ease of operation
If the handle is disposed outside the door panel, then the operability during emergency operation is improved, but the device complexity increases
Solution Approach 1:
The handle is designed with dynamic capability to pivot between a retracted position (aligned with the door panel surface) and an extended outward position (perpendicular to the door panel). This dynamic movement allows the handle to achieve a longer lever arm for reduced operation load during emergencies, while returning to a compact configuration when not in use, thereby managing structural complexity.
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 improved design enhances the operability of emergency operations by allowing easy access to the bezel-type handle, reducing the operation load through the lever principle, and maintaining the bezel's function as a decorative part, thereby reducing the overall size and cost of the door handle device.
Implementation Method 1
in the outward pivoting operation on the other end side of the bezel-type handle having one end rotatably supported, the distance between the pivoting shaft and the operation position of the user increases, the operation load can be reduced by the lever principle
Data Source
AI summary
The door handle device includes a base that defines a recess facing an opening of a door panel, and a handle that is adjacent to the opening and disposed on an outer side of the door panel, is pivotably supported by the base, and is capable of switching the latch mechanism to the release state by an outward pivot operation.