Slider Handle Attachment Mechanism for Abrasion Reduction
Solution Overview
Problem
Conventional slider fasteners for slide fasteners face issues with high production costs due to press machining, and die-cast products suffer from abrasion and deformation when attaching or detaching the handle, leading to unpleasant sounds and potential pricking or scratching due to the protruding column part.
Innovation Solution
A slider design featuring a die-cast product with cantilever engagement pieces and a column part having an attachment/detachment head, where the engagement portions have a head receiving space and slanted planes to reduce deformation force and abrasion, and the column part's height is aligned with the handle's surface to prevent protrusion and scratching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If press machining is used to manufacture the handle, then the handle can be easily elastically deformed for engagement, but the production cost and equipment maintenance cost increase
Solution Approach 1:
The patent changes the material parameters by using a resin material with appropriate elasticity instead of metal, and modifies the structural parameters by designing the engagement pieces with specific thickness and geometry to achieve the required elastic deformation capability without press machining
Solution Approach 2:
The patent uses a cost-effective resin material for the handle body that can be mass-produced through injection molding, replacing expensive metal press machining while maintaining sufficient durability for the engagement function
2Ease of operation
If the column part protrudes on the upper surface of the slider body, then the handle can be engaged with the attachment/detachment head, but the column part may cause pricking feeling or scratching
Solution Approach 1:
The attachment/detachment head is nested within the window portion of the handle when engaged, and the column part is recessed into the slider body surface, creating a nested configuration that eliminates protruding sharp edges while maintaining engagement functionality
Solution Approach 2:
The patent applies different surface qualities to different parts: the column part has a smooth recessed surface to prevent pricking, while the attachment/detachment head maintains engagement surfaces with appropriate friction characteristics for secure coupling
3Ease of manufacture
If die-casting is used to manufacture the handle, then production cost decreases, but the handle cannot be easily elastically deformed for engagement
Solution Approach 1:
The patent changes the material parameters by selecting resin materials with appropriate elastic modulus and damping characteristics that allow easy elastic deformation, and modifies the structural parameters by optimizing the thickness and geometry of the engagement pieces to achieve sufficient flexibility
Solution Approach 2:
The patent uses composite construction with the handle body made of resin material that provides both structural integrity and elastic deformation capability, potentially combining different resin materials or adding reinforcement elements to achieve the desired balance between rigidity and flexibility
4Ease of operation
If the cantilever engagement pieces are elastically deformed for engagement, then the handle can be attached to the column part, but abrasion and deformation occur leading to unpleasant sounds
Solution Approach 1:
The patent designs the engagement pieces with sufficient initial thickness and elastic capacity to absorb repeated deformation cycles without permanent set, and incorporates damping characteristics in the resin material to reduce vibration and abrasion during engagement operations
Solution Approach 2:
The patent optimizes the geometric parameters of the engagement pieces including thickness, length, and cross-sectional area to achieve the right balance between elastic deformation capability and resistance to abrasion and permanent deformation
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 design reduces abrasion and deformation, improves durability, and prevents pricking or scratching, allowing for easier handling and installation of components like seat covers by minimizing the sliding range and contact area, thus enhancing the slider's functionality and user experience.
Implementation Method 1
a pair of the left and right cantilever engagement pieces which are formed to extend toward the front end of the handle are provided in the window, and a knob portion is formed at the front end of the handle by folding the free end portion upwards and, after that, bending in the horizontal direction
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A slider (10) for a slide fastener having a slider body (11) and a handle (12) of which one end is supported by a pivot supporting portion (11-8) on an upper surface of the slider body (11), wherein a window portion is formed in a handle main body (12-3) of the handle (12), wherein a pair of left and right cantilever engagement pieces (12-5) are disposed to extend from one of inner edge portions of the window portion toward a facing inner edge portion, and wherein a handle attachment/detachment column part (11-8) having an attachment/detachment head (11-8b) which is attached to or detached from the pair of the left and right cantilever engagement pieces (12-5) in a snapped shape is disposed to protrude at least at a rear opening slide on the upper surface of the slider body (11), wherein the pair of the left and right cantilever engagement pieces (12-5) have engagement portions with respect to the attachment/detachment head (11-8b) at facing inner side surfaces thereof, in the engagement portion, at least a free end portion of each of the pair of the left and right cantilever engagement pieces (12-5) is formed to have a slanted plane (12-9) which is slanted downward with respect to the facing plane, and the engagement portions are configured to have a head receiving space (PS) which receives the attachment/detachment head (11-8b) at the time of engaging each of the cantilever engagement pieces (12-5) with the attachment/detachment head (11-8b).