Latch Hook Positioning Device With Elastic Tolerance Adjustment
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Solution Overview
Problem
Existing latch hook devices require precise installation and wear over time, failing to maintain a tight closure due to limited spacing tolerance and mechanical wear.
Innovation Solution
A latch hook-type positioning device utilizing an elastic member to allow pivotal movement and elastic displacement, enabling easy installation with a larger tolerance and secure engagement between the latch bar and positioning member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional hook device is used with fixed spacing between handle and hook, then the structure is simple, but the installation tolerance is small and precise installation is required
Solution Approach 1:
The latch bar is made movable through sliding grooves instead of being fixed, allowing it to dynamically adjust its position. This dynamic structure enables the latch bar to compensate for spacing variations during installation, providing larger installation tolerance while maintaining a relatively simple overall structure.
Solution Approach 2:
The elastic member changes the physical state of the latch bar from rigid to flexible, allowing elastic deformation. This parameter change enables the latch mechanism to adapt to different spacing conditions, significantly increasing installation tolerance without substantially increasing structural complexity.
2Reliability
If a fixed latch hook device is used, then the structure is stable, but it wears over time and fails to maintain tight closure
Solution Approach 1:
The movable latch bar within sliding grooves allows continuous adjustment to maintain proper engagement. This dynamic capability compensates for wear over time, enabling the device to maintain reliable closure functionality throughout its extended service life.
Solution Approach 2:
The elastic member provides continuous elastic deformation capability, allowing the latch bar to self-adjust and maintain proper engagement force. This parameter change ensures the device maintains reliable closure performance over an extended duration, reducing the impact of wear.
3Adaptability or versatility
If the spacing between door frame and door plate varies, then adaptability is reduced, but the device becomes easier to install with standard spacing
Solution Approach 1:
The latch bar's ability to move within sliding grooves provides adaptability to various spacing conditions. This dynamic adjustment capability allows the device to be installed easily across different spacing scenarios without requiring precise pre-measurement or customization.
Solution Approach 2:
The elastic member enables the latch mechanism to function effectively across a range of spacing conditions. This universal design allows a single device configuration to accommodate various installation scenarios, improving both adaptability and installation ease.
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 device provides stable engagement and secure closure with a larger installation tolerance, reducing wear and maintaining door or window closure effectively, while the elastic members ensure a tight seal and noise reduction.
Implementation Method 1
use the elasticity of an elastic member of a latch hook unit to permit elastic displacement of a latch bar
Data Source
AI summary
A latch hook-type positioning device includes a base fixed to a first part of an article. A positioning member is fixed to a second part of the article and includes a hook portion. An end of a pivotal member is pivotably connected to the base. A latch hook unit includes a body, a positioning pin, and a latch bar releasably engaged with the hook portion. The body includes a bottom side having a receiving space and at least one sliding groove at an end of the receiving space. The other end of the pivotal member is pivotably connected to the other end of the receiving space of the body. At least one elastic member is attached between the positioning pin and the latch bar. The latch bar is slideable in the at least one sliding groove to stretch the at least one elastic member, providing a larger tolerance for installation.