Tool Operated Channel Latch With Over-Center Toggle
Solution Overview
Problem
Existing channel latch systems often require two hands and tools to operate, leading to potential false positive latch conditions and inefficiencies, such as needing separate tools for unlocking and prying, which can result in accidental closures or openings.
Innovation Solution
A single-hand, single-tool operated channel latch system with an over-center toggle mechanism and a lock assembly that provides clear indications of locked and unlocked states, eliminating the need for additional tools and preventing false positive closures through a torsion spring-loaded lock body that requires intentional operation to engage or disengage the latch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional channel latch system is used, then the latch can secure the panel, but it requires two hands and multiple tools to operate, increasing operational complexity
Solution Approach 1:
The patent combines the unlocking function and the prying/opening function into a single tool operation. The tool inserted into the recess performs both functions sequentially: first rotating the lock body to unlock, then leveraging against the lever arm to open the latch. This eliminates the need for a second prying tool and reduces hand requirements from two to one.
Solution Approach 2:
The single tool serves multiple functions: it acts as both the key for unlocking the latch and the lever for prying the latch open. The recess in the actuator is designed to receive the tool, and the tool's handle portion is used to pry against the lever arm after unlocking. This multi-functional design reduces the number of separate tools needed.
2Reliability
If a simple latch mechanism is used, then the structure is easier to manufacture, but it may produce false positive latch conditions where the latch appears locked but is not securely engaged
Solution Approach 1:
The latch mechanism includes visual indicators (colored bands or windows) that provide feedback about the latch's engagement status. When the latch is securely locked, the indicator shows one color state; when unlocked or improperly engaged, it shows a different color state. This feedback mechanism prevents false positive latch conditions by allowing the operator to verify proper engagement.
Solution Approach 2:
The patent uses color-coded indicators to communicate the latch's state. Different colors indicate different engagement conditions, providing clear visual feedback to the operator. This helps prevent false positive latch conditions by making the actual engagement status immediately apparent.
3Reliability
If a lock assembly with over-center toggle is added to prevent false positives, then latch reliability improves, but the device complexity increases
Solution Approach 1:
The latch mechanism employs an over-center toggle linkage that dynamically transitions between locked and unlocked positions. The linkage passes through a neutral position and then snaps into the locked position past the center point, creating a stable locked state. This dynamic mechanism provides reliable latching with positive engagement indication while keeping the overall structure relatively simple.
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
Enables secure, single-handed operation of the latch with clear indication of locked or unlocked states, preventing accidental closures and reducing the complexity of operation by integrating the locking mechanism into a single tool operation, thus ensuring reliable and efficient panel management.
Implementation Method 1
a torsion spring-loaded lock body that requires intentional operation to engage or disengage the latch
Data Source
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Figure 5
AI summary
The present disclosure includes a tool operated channel latch used to secure a panel against a structure. The latch includes a bracket which mounts to a movable panel and includes an actuating mechanism to open and close the latch. A bolt is pivotably retained relative to the bracket for engaging against the structure closed by the panel. A lock assembly is carried on the actuator to engage a link which is movably coupled with both the bolt and the actuator. The lock assembly includes extending portions to engage at least one corresponding opening of the link. The link provides an over center toggle condition to retain the latch in a locked position until intentionally actuated by an operator.