Cover fastening clip

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Solution Overview

Problem

Existing cover material fastening clips are difficult to operate due to the narrow wire insertion range and require strong force for correct alignment, making it troublesome to lock the wire to the hook, especially when the clip is inclined, and the guide piece extends below the hook, causing the wire to be outside the guide piece.

Innovation Solution

A cover material fastening clip with a hook positioned below the locking part, featuring a claw-shaped portion and a guide piece that forms a triangular oblique introduction passage, allowing for easy wire insertion and locking, even when the clip is inclined, with the guide piece extending beyond the claw-shaped portion to guide the wire securely.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the guide piece extends below the hook, then the hook structure is simple, but the wire insertion range becomes narrow and alignment becomes difficult

Engineering Contradiction:
Improvehook structureVSAvoidwire insertion alignment
Core Design Contradiction:
Device complexityVSEase of operation

Solution Approach 1:

The guide piece is designed to extend laterally beyond the hook in the horizontal dimension, creating an expanded insertion zone. This lateral extension allows the wire to be inserted from a wider range of positions without requiring precise vertical alignment, thus solving the contradiction between simple hook structure and easy wire insertion alignment.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Device complexity

If the guide piece extends below the hook, then the structure is compact, but strong force is required for correct insertion

Engineering Contradiction:
Improvestructure compactnessVSAvoidinsertion force
Core Design Contradiction:
Device complexityVSForce

Solution Approach 1:

By extending the guide piece laterally beyond the hook, the insertion point is distributed across a wider horizontal area. This allows the wire to engage the hook more gradually and naturally, reducing the peak insertion force required compared to a configuration where the wire must be precisely aligned vertically with a compact guide piece.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Adaptability or versatility

If the clip is inclined during operation, then the structure can accommodate angular variations, but the wire falls outside the guide piece and cannot be hooked

Engineering Contradiction:
Improveangular accommodationVSAvoidwire engagement
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The guide piece extends laterally beyond the hook on both sides, creating a widened insertion zone that accommodates angular variations and inclined positions. This lateral extension ensures that even when the clip is inclined, the wire remains within the guide piece's coverage area, maintaining reliable wire engagement while allowing angular adaptability.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

4Ease of operation

If the guide piece is positioned to allow easy wire insertion, then the operation is simple, but the guide piece may interfere with the locking mechanism

Engineering Contradiction:
Improvewire insertion easeVSAvoidlocking mechanism clearance
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The guide piece is segmented into distinct functional zones: a lateral extension portion for wire insertion guidance, and a retracted portion near the locking mechanism. This segmentation allows the guide piece to extend laterally for easy wire insertion while maintaining adequate clearance from the locking mechanism, preventing interference between the two functions.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS9827890B2Cover fastening clip
Publication Date: 2017.11.28 YKK CORP
  • US9827890B2 patent drawing
  • US9827890B2 patent drawing
  • US9827890B2 patent drawing

AI summary

A cover fastening clip includes a locking section that locks with an end member to be locked that is provided on the edge of a cover, and a hook that engages with a wire disposed in a groove of a cushion material. The hook is provided with an extended section that extends down from the locking section and a claw-shaped section, and the locking section is provided with a guide piece. The guide piece extends down along the extended section of the hook, bends at a midway bending section, and extends toward the distal end of the claw-shaped section. A wire insertion opening that has a prescribed gap and into which the wire is inserted is formed by the distal end of the guide piece reaching a location that faces the distal end of the claw-shaped section.