Foldable Saw Spring Wire Latch Mechanism
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Solution Overview
Problem
Conventional foldable saws require complex processing and multiple components for their latch mechanisms, hindering cost savings and production efficiency.
Innovation Solution
A foldable saw design utilizing a latch body made of single spring wire with a coil section, stop pin, latch section, and operation section, which is easily assembled and attaches to the saw handle body, allowing for a simple and effective latching mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional latch mechanism with multiple components (ratchet portion, engagement piece, operation piece, spring member, pin) is used, then the latching function is achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple separate components (ratchet portion, engagement piece, operation piece, spring member, and pin) into a single integrated latch body made of spring wire. This latch body includes a coil section, stop pin section, latch section, and operation section all formed from one continuous piece of material, thereby reducing the number of components while maintaining the latching function.
Solution Approach 2:
The single latch body performs multiple functions simultaneously: the coil section provides spring bias, the stop pin section provides pivoting and attachment, the latch section provides latching engagement, and the operation section provides user actuation. This multi-functional design eliminates the need for separate components for each function.
2Reliability
If a conventional latch mechanism with multiple components and complicated processing steps is used, then the latching function is achieved, but the productivity and assembly efficiency decrease
Solution Approach 1:
By merging all latch mechanism components into a single latch body that can be formed from one continuous piece of spring wire through bending and coiling operations, the patent eliminates multiple assembly steps. The latch body is attached to the saw handle body as a single component, dramatically improving assembly efficiency and productivity.
Solution Approach 2:
The latch body is pre-formed with all necessary sections (coil, stop pin, latch, and operation sections) integrated into a single component before attachment to the saw handle body. This preliminary integration of all functional elements into one piece eliminates the need for complex assembly operations during final product manufacturing.
3Reliability
If a conventional latch mechanism with multiple components is used, then the latching function is achieved, but the manufacturing cost increases
Solution Approach 1:
The patent merges multiple bill of materials items (ratchet portion, engagement piece, operation piece, spring member, pin) into a single latch body component. This reduction in component count directly reduces material costs, manufacturing overhead, and inventory complexity, thereby lowering overall manufacturing cost while maintaining the latching function.
Solution Approach 2:
The latch body is formed by changing the physical state and shape of spring wire through coiling and bending operations, transforming a simple wire form into a complex multi-functional component. This parameter change approach allows a single inexpensive material (spring wire) to perform the functions of multiple more expensive components.
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 enables easy production and assembly with minimal components, providing a favorable latching effect while reducing costs and improving production efficiency.
Implementation Method 1
the latch body is made of single spring wire and includes at least a coil section wound into a coil form
Implementation Method 2
the latch section is spring-biased to enter into the receiving groove of the saw handle body, and that the latch section is responsive to an operation of the operation section to retreat against the spring bias
Data Source
AI summary
A foldable saw includes, on a saw handle body, a latch body made of spring wire and including a coil section, a stop pin section, a latch section, and an operation section. The saw handle body includes at least a seating recess, a pin hole, and a receiving groove. The latch body is configured, in the state of being attached to the saw handle body, such that the latch section located in front of the coil section enters into the receiving groove by spring bias, and that the latch section retreats against the spring bias in response to an operation of the operation section located in the rear of the coil section.