Cord Lock Side Engagement for Compact Pressing Length
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Solution Overview
Problem
Conventional cord locks face challenges in minimizing size due to the biasing force applied, which prevents the male and female tools from separating, making it difficult to reduce the size of the cord lock in the pressing direction.
Innovation Solution
The design incorporates an engaging part on the male tool that protrudes outward, intersecting the eyelet direction, and an elastically deformable engaged part on the female tool, along with a compression coil spring with a smaller diameter, allowing the male tool to be inserted and secured without separating, even when not pressed, thus minimizing the size of the cord lock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional cord lock uses a protrusion below the eyelet to prevent separation, then the male and female tools are prevented from separating, but the distance between the eyelet and the inner end of the male tool cannot be reduced, making it difficult to minimize the size of the cord lock
Solution Approach 1:
The engaging part is repositioned from below the eyelet (conventional location) to the side surface of the male tool at a position closer to the pressing backward side. This spatial relocation in a different dimension allows the eyelet to be positioned more forward without compromising separation prevention, thereby reducing the overall length of the male tool in the pressing direction.
Solution Approach 2:
The cord lock is divided into distinct functional components: the engaging part on the male tool and the engaged part on the female tool. This segmentation allows independent optimization of each component's position and function, enabling the eyelet to be relocated for size reduction while the engaging part separately handles the separation prevention function.
2Length of moving object
If the cord lock is designed to be compact in the pressing direction, then the size is minimized, but it becomes difficult to maintain engagement without separation prevention mechanisms
Solution Approach 1:
The engagement mechanism is moved from the conventional below-eyelet position to the side surface of the male tool. This dimensional change allows the engaging part to engage with the engaged part on the female tool at a location that does not increase the length in the pressing direction, maintaining compact size while ensuring reliable engagement.
Solution Approach 2:
The engaging part is pre-positioned on the side surface of the male tool before the pressing operation. This preliminary positioning ensures that when the male tool is inserted into the female tool, the engaging part automatically engages with the engaged part, providing immediate engagement stability without requiring additional separation prevention mechanisms that would increase size.
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
This configuration ensures the male and female tools remain engaged without the biasing force, allowing for a smaller cord lock size while maintaining functionality, enabling easy assembly and preventing separation when the cord is not drawn through.
Implementation Method 1
a biasing means (3), and eyelets (13, 22) for a cord (C), which are formed in sides (11, 23) of the male tool (1) and the female tool (2), are matched with each other at a predetermined pressing position of the male tool (1)... a biasing force of a biasing means
Implementation Method 2
a part of the side of the female tool (2) located between the communicating part (24) and an upper surface of the female tool (2) on the pressing backward side of the male tool (1) constitutes an elastically deformable engaged part (25)
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A cord lock includes a male tool and a female tool that receives a part of the male tool by pressing the male tool against a biasing force of a biasing device, and so as to match cord eyelets formed in sides of the male tool and the female tool each other at a predetermined pressing position of the male tool. An engaging part that is engaged with an engaged part of the female tool by the biasing force of the biasing device to prevent the male tool from slipping out of a position before the pressing operation, is formed on a side of the male tool intersecting a direction in which the eyelet passes through, and at a position closer to a pressing backward side than a hole edge located on a pressing forward side of the eyelet.