Switchblade Slider Tab Design for Cost Reduction
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Solution Overview
Problem
Conventional double action switchblades require precise manufacturing tolerances for the slider, increasing production and maintenance costs due to the need for precise clearances and potential interference between components.
Innovation Solution
A switchblade design featuring a slider with a tab connected to the actuator, allowing for forward and rearward movement without interfering with locks, enabling uniform thickness and simplified manufacturing, and allowing for easy replacement of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If precise manufacturing tolerances are used for the slider, then reliable operation is achieved, but manufacturing cost increases
Solution Approach 1:
The slider is designed with simplified geometry and standard tolerances, making it a low-cost component that can be easily replaced if needed. The design accepts that the slider may wear over time but compensates through easy replaceability rather than requiring precision-engineered longevity.
Solution Approach 2:
The patent changes the geometric parameters of the slider, specifically adding the tab feature that protrudes through the casing, which alters the clearance requirements and allows for larger tolerances. This parameter change enables the slider to function reliably without requiring precision machining.
2Reliability
If precise clearances are maintained in the slider, then component interference is prevented, but manufacturing complexity increases
Solution Approach 1:
The tab is extracted from the traditional internal slider geometry and positioned to protrude through the casing. This extraction allows the tab to engage the actuator externally, simplifying the internal clearance requirements and reducing manufacturing complexity while preventing component interference.
Solution Approach 2:
The tab acts as an intermediary element between the slider and the actuator. By providing this intermediate engagement feature, the design decouples the precision requirements between these components, allowing each to be manufactured with standard tolerances while maintaining reliable operation.
3Ease of manufacture
If a tab is added to the slider to engage the actuator, then manufacturing is simplified, but device complexity increases
Solution Approach 1:
The tab serves multiple functions: it provides the connection between the slider and actuator, protrudes through the casing to enable external engagement, and simplifies the internal geometry of the slider. This multi-functionality justifies the added structural element while maintaining manufacturing simplicity.
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
Reduces manufacturing and maintenance costs by eliminating the need for precise machining and allowing for one-handed operation with reduced risk of inadvertent deployment or retraction.
Implementation Method 1
a spring connects the front operator to the rear operator
Data Source
AI summary
A switchblade includes a casing that defines a cavity. A blade has a cutting edge with a retracted position in which the cutting edge is inside the cavity and a deployed position in which the cutting edge is outside of the cavity. An actuator is slidably engaged with the casing. A front lock is inside the cavity and engaged with the blade in the deployed position, and a rear lock is inside the cavity and engaged with the blade in the retracted position. A slider inside the cavity has a first side opposed to a second side, and the slider defines a front sloped surface and a rear sloped surface. A tab is releasably connected to the slider and engaged with the actuator.