Drawer Latch Assembly With Replaceable Catch and Shared Pivot
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Solution Overview
Problem
Existing drawer latch systems for tool cabinets are prone to damage, leading to costly replacements when the catch or handle is damaged, and lack a straightforward mechanical design that protects the latch component from inadvertent damage.
Innovation Solution
A drawer latch mechanism with a catch member pivotally connected to the sidewall independently of the handle, featuring a receiving means on the handle to secure the catch, allowing for easy repair and protection from damage, utilizing a biasing mechanism such as a spring or weight to maintain the catch in an engaged position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the catch is positioned within the interior volume of the drawer, then the latch mechanism can be compact, but the catch is prone to breakage or bending rendering the drawer inoperative
Solution Approach 1:
The latch mechanism is divided into separate functional components: the handle bar (for user operation), the catch (for latching), and the strike (for engagement). This segmentation allows the catch to be positioned optimally for durability while maintaining compact overall dimensions. The catch is mounted on the drawer body rather than being integrated into the handle, protecting it from damage while keeping the mechanism space-efficient.
2Device complexity
If the drawer handle and catch are integrated as one component, then the structure is simpler, but the entire handle must be replaced when the catch becomes damaged
Solution Approach 1:
The latch assembly is segmented into the handle bar and the catch as separate components. The catch is mounted on the drawer body and can be independently replaced without removing the handle bar. This segmentation maintains structural simplicity while enabling easy repair - if the catch wears or breaks, only the small catch component needs replacement, not the entire handle assembly.
Solution Approach 2:
The catch is extracted from the handle bar and mounted separately on the drawer body. This extraction allows the catch to be serviced independently - it can be removed, replaced, or adjusted without affecting the handle bar or other components. The handle bar remains as a separate operational component while the catch serves as a replaceable latching element.
3Reliability
If the catch is positioned on opposed sides of the drawer handle, then the latch can engage the cabinet frame, but the entire drawer handle must be replaced if the handle or catch becomes damaged
Solution Approach 1:
The latch system is segmented so the catch operates independently from the handle bar. The catch is mounted on the drawer body and can engage the cabinet frame strike, while the handle bar remains a separate operational component. This segmentation enables the catch to be replaced independently if damaged, avoiding the need to replace the entire handle assembly and reducing repair costs.
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 cost-effective and easily repairable drawer latch system that protects the latch mechanism from damage, allowing for independent maintenance of handle and catch components without replacing the entire assembly, enhancing the structural integrity and reducing maintenance costs.
Implementation Method 1
a spring, positioned within the drawer and engaged with the catch member, for biasing the catch member towards the frame component
Implementation Method 2
a weight member positioned within the drawer and engaged with the catch member, for biasing the catch member towards the frame component
Data Source
AI summary
A drawer latch assembly. The assembly provides a catch member which is mechanically connected but a separate component from the drawer handle. The drawer handle and catch operate in a concerted pivoting motion and pivot about a common fastener. The drawer handle provides a pair of arms which extend through the front wall of the drawer and have terminal end portions which include the cut out segment which locates and receives a portion of the latch member. In this manner the latch and terminal end portions of the arms are keyed together which alleviates stress on the pivot point and allows for easy repair of the arrangement in the event that either the handle or the catch become damaged.