Toggle Latch Automatic Latching Ramp and Cavity Design
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Solution Overview
Problem
Traditional toggle latches for exterior gates are crude and inexpensive, lacking in functionality and industrial design, with manual operation required for opening and no automatic mechanism for secure latching.
Innovation Solution
A toggle latch design featuring pivotally mounted latch arms and units made from molded plastics with a complex curved cavity and ramp mechanism, allowing for automatic latching and secure engagement, with the option to extend the latch arm to either side and incorporating features for padlock storage and corrosion-resistant materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional metal toggle latches are used, then the latch is simple and inexpensive to manufacture, but the latch lacks functionality, has poor industrial design, and requires manual operation
Solution Approach 1:
The latch arm is designed to automatically latch when the gate closes by itself without requiring manual operation. The arm pivots about a horizontal axis and automatically engages with the receiving cavity when the gate moves into the closed position, making the system self-servicing for the latching function
Solution Approach 2:
The receiving cavity features a complex curved surface with a decreasing radius of curvature that guides and deflects the latch arm into the correct engagement position. The curved geometry automatically directs the arm into the cavity without requiring manual intervention or complex mechanical guides
2Reliability
If molded plastics units with complex curved cavities are used, then the latch achieves secure automatic latching and improved industrial design, but the manufacturing precision requirements increase
Solution Approach 1:
The latch units are manufactured using molded plastics material that combines durability with corrosion resistance. The plastic body integrates the receiving cavity, mounting features, and structural elements into a single molded component, achieving both reliability and manufacturing efficiency
Solution Approach 2:
The complex curved surface of the receiving cavity with decreasing radius of curvature is precisely formed through molding processes. The curved geometry provides automatic guidance and secure engagement of the latch arm, ensuring reliable latching while the molding process capabilities meet the precision requirements
3Adaptability or versatility
If the latch arm can extend to either side with symmetrical body design, then the adaptability for different mounting configurations is improved, but the device complexity increases
Solution Approach 1:
The body is designed with symmetrical geometry that allows the latch arm to extend to either the left or right side. The identical body design can be inverted for different mounting configurations, making the latch universal for various gate orientations and installation scenarios without requiring multiple specialized components
Solution Approach 2:
While the body maintains overall symmetrical form for versatility, the internal cavity geometry features asymmetric curved surfaces with specific orientation. The complex curve with decreasing radius of curvature is positioned and oriented to properly guide the latch arm into engagement regardless of which side the arm extends, achieving versatility through strategic use of symmetry and asymmetry
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 design provides improved functionality, secure automatic latching, and enhanced industrial design with durable, corrosion-resistant materials, ensuring long-term service without maintenance.
Implementation Method 1
a forward nose providing a ramp to deflect upwardly and over the nose the latch arm when impacting thereon
Implementation Method 2
an interior retainer surface defining upper and rear surfaces of the cavity and profiled to deflect down into the cavity the latch arm after it has ridden up over the nose
Implementation Method 3
a pivotally mounted latch arm projecting laterally and pivotal about a substantially horizontal axis
Implementation Method 4
a pivotal bar strikes on a closure ramp to be deflected upwardly and then drops down into a receiving cavity for latching purposes
Data Source
AI summary
A toggle latch for a gate has a first unit mounting a pivotal latch arm and adapted to be mounted on the gate and a second unit providing a receiving and latching cavity and adapted to be mounted on a gate post, the body portion of the second unit having a forward nose to provide a ramp to deflect upwardly and over the nose the latch arm when impacting thereon and an interior retaining surface defined in the body and having upper and rear surfaces of the cavity to deflect down into the cavity the latch arm after it has ridden up over the nose.