Lift Handle Gear-Rack Layout for Tight-Space Door Latching
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Solution Overview
Problem
Conventional lift handle arrangements require a large turning radius, which can be obstructive in compact environments and may not efficiently utilize space, and they directly couple to the latching mechanism, potentially causing damage or requiring excessive space for operation.
Innovation Solution
A compact lift handle arrangement featuring a housing with a rotatable handle and gear system, utilizing a motion converter with a gear rack and pre-biased spring to convert handle rotation into gear rotation, allowing for secure operation with reduced component count and protected internal mechanics, enabling secure and efficient operation in limited spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the handle is rotated in two directions for unsecuring or securing the door, then the door can be securely opened and closed, but a relatively large free space is required due to the turning radius of the handle
Solution Approach 1:
The gear rack is received within a recess in the handle, and the abutting element is received within a recess in the housing. This nesting arrangement allows the motion converter components to be compactly integrated into the handle assembly, reducing the overall space required while maintaining the two-directional rotation mechanism for secure door operation.
Solution Approach 2:
The motion converter uses a gear rack that moves along a third axis (longitudinal axis of the handle) to convert the first rotation (around first axis) into the second rotation (around second axis). This dimensional transformation allows the mechanism to achieve the required rotational movement in a more space-efficient manner by utilizing linear motion along the handle's length rather than requiring large radial clearance.
2Device complexity
If the handle is configured to directly couple to the latching mechanism, then the structure is simplified, but the latching mechanism may be damaged or excessive space is required for operation
Solution Approach 1:
The gear acts as an intermediary between the handle and the latching mechanism. When the handle rotates, it drives the gear rack which in turn rotates the gear, and the gear is coupled to the latching mechanism. This intermediate gear transmission allows the handle to operate the latching mechanism with reduced direct mechanical stress and improved durability.
3Reliability
If the handle is rotated in two directions, then the door can be securely opened and closed, but the handle may be obstructed when rotated around the second axis in a compact environment
Solution Approach 1:
The gear rack is received within a recess in the handle, and the abutting element is received within a recess in the housing. This nesting arrangement allows the motion converter components to be compactly integrated into the handle assembly, reducing the overall space required while maintaining the two-directional rotation mechanism for secure door operation.
Solution Approach 2:
The motion converter uses a gear rack that moves along a third axis (longitudinal axis of the handle) to convert the first rotation (around first axis) into the second rotation (around second axis). This dimensional transformation allows the mechanism to achieve the required rotational movement in a more space-efficient manner by utilizing linear motion along the handle's length rather than requiring large radial clearance.
4Area of stationary object
If a compact handle arrangement is used, then space is optimized, but the internal mechanics may be exposed to damage and environmental factors
Solution Approach 1:
The gear rack is received within a recess in the handle, and the abutting element is received within a recess in the housing. This nesting arrangement allows the motion converter components to be compactly integrated into the handle assembly, reducing the overall space required while maintaining the two-directional rotation mechanism for secure door operation.
Solution Approach 2:
The housing provides a protective enclosure for the internal mechanics including the gear, gear rack, and abutting element. This shell structure protects the compactly arranged components from environmental factors and damage while maintaining the compact overall arrangement.
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 solution provides a compact, secure, and efficient handle arrangement that reduces the risk of mechanical failure, protects internal components, and optimizes space usage, ensuring secure operation and prolonged durability by minimizing exposure to damage and environmental factors.
Implementation Method 1
The motion converter is provided with a pre-biased spring configured to push an abutting element towards a recess in said handle
Data Source
AI summary
The present disclosure presents a handle arrangement and a use for said handle arrangement. Said handle arrangement comprises a housing, a handle comprising a handle grip and a coupling portion, the handle rotatable relative to the housing around a first axis, and a gear, the gear rotatable relative to said housing 5 around a second axis, the handle arrangement further comprising a motion converter comprising a gear rack arranged adjacently to the gear, the motion converter gear rack being linearly moveable relative the gear along a third axis and comprises cut teeth configured to engage with corresponding cogs of the gear, wherein the motion converter is coupled to the handle such that a rotation of the handle around the first 10 axis causes the motion converter gear rack to move along the third axis causing the gear to rotate around the second axis.