Sliding Scale Release for Automatic Opening Tool
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Solution Overview
Problem
Conventional automatic knives with Flylock mechanisms are complex, difficult to service, and not easily reconfigurable for left-hand or right-hand use, often featuring visible and unsightly buttons and levers, with potential blade wiggle issues due to manufacturing tolerances and wear.
Innovation Solution
A simplified automatically opening tool design with a sliding scale mechanism along the longitudinal axis, allowing for easy user service and reconfiguration, featuring a frame with opposing side walls and a hidden release mechanism that can be activated by sliding the scale, using fewer parts and eliminating visible fasteners, with a sear and cam system that locks the blade securely in both open and closed positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If conventional Flylock mechanisms are used, then the automatic opening function is achieved, but the device complexity increases with multiple parts including pins, springs, levers, and cams
Solution Approach 1:
The patent combines multiple conventional Flylock mechanism components (sear, cam, spring, button) into an integrated scale assembly. The scale itself becomes both a structural component and the release activation mechanism, eliminating the need for separate pins, levers, and buttons while maintaining the automatic opening function through a unified design.
Solution Approach 2:
The scale serves multiple functions simultaneously: it acts as a structural cover, a sliding release mechanism, and an ambidextrous activation component. This multi-functionality reduces the overall part count while maintaining the automatic opening capability that conventional designs achieve with dedicated components.
2Extent of automation
If conventional Flylock mechanisms are used, then the automatic opening function is achieved, but the ease of repair deteriorates as the mechanisms are not internally user serviceable
Solution Approach 1:
The mechanism is divided into separable modules: the scale assembly can be independently removed from the handle, and the blade assembly can be detached from the handle. This segmentation allows users to access, inspect, and replace individual components without disassembling the entire mechanism, greatly improving serviceability while maintaining the automatic opening function.
Solution Approach 2:
The design enables users to perform maintenance and repairs themselves through simple removal and reattachment of the scale and blade assemblies. The standardized interface and minimal fastening requirements allow non-technical users to service the mechanism without specialized tools or knowledge, reversing the conventional approach where factory assembly precludes user maintenance.
3Extent of automation
If conventional Flylock mechanisms are used, then the automatic opening function is achieved, but the adaptability deteriorates as they are not readily reconfigurable for left-hand and right-hand activation
Solution Approach 1:
The scale is designed to slide freely in either direction along the handle axis, allowing dynamic reconfiguration between left-hand and right-hand activation modes. The symmetrical mounting provisions and bidirectional sliding capability enable the same mechanism to adapt to different user preferences without modification, unlike conventional fixed-configuration Flylock designs.
Solution Approach 2:
The mechanism incorporates symmetrical mounting features that allow asymmetric configuration: the scale can be mounted on either the left or right side of the handle, and the sliding direction can be reversed. This intentional symmetry in the base design enables asymmetric adaptation to different hand configurations while maintaining the core automatic opening function.
4Extent of automation
If conventional Flylock mechanisms with visible buttons and levers are used, then the automatic opening function is achieved, but the appearance becomes unsightly
Solution Approach 1:
The release mechanism is extracted from conventional visible button and lever components and integrated into the scale itself. The scale's sliding motion along the handle axis provides the release function without requiring protruding buttons or exposed levers, creating a clean, streamlined appearance while maintaining the automatic opening capability.
Solution Approach 2:
The aesthetic cover function of the scale is merged with the mechanical release function. Instead of having separate decorative scales and functional release components, the scale itself performs both roles, eliminating visible fasteners and mechanical parts while preserving the automatic opening function through the sliding scale mechanism.
5Extent of automation
If conventional Flylock mechanisms with square cut sears and sear holes are used, then the automatic opening function is achieved, but the reliability deteriorates due to manufacturing tolerances causing blade wiggle
Solution Approach 1:
Instead of using conventional square cut sears that rely on tolerance clearance for operation, the invention inverts the approach by using precision-machined cam surfaces with controlled clearance. The cam profile is designed to provide positive engagement and controlled play, reversing the conventional tolerance-based fit and achieving better blade stability while maintaining the automatic opening function.
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 a user-serviceable, ambidextrous tool with reduced part count and improved blade stability, offering a sleek appearance without visible fasteners and enhanced user convenience through easy assembly and disassembly.
Implementation Method 1
a resilient member, such as a coil kick spring, that biases the cam to rotate
Implementation Method 2
The scale can be coupled to the automatic opening mechanism so that the scale activates the mechanism when it is slidingly reciprocated along the longitudinal axis
Data Source
AI summary
An automatically opening tool with sliding scale release, including a frame; a tool; a release mechanism attached to the tool; a biasing mechanism for extending the tool; and a scale coupled to the frame and release mechanism. The tool is constructed such that sliding the scale along the longitudinal axis automatically unlocks the tool from the extended or retracted configurations. The tool can open automatically or manually. The tool can swing open or extend out a front opening in the frame.