Watch Band Spring Rod Assembly Without Thread Fixation
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Solution Overview
Problem
The existing band and timepiece assembly methods, particularly those involving spring rods with lever sections and sliders, face challenges such as increased manufacturing steps and decreased yield due to the complexity of attaching lever sections using threads, leading to difficulties in assembling the spring rod with the band.
Innovation Solution
The proposed solution involves a band design with a spring rod that includes first and second operation levers linked to sliders, and a linkage piece with recesses and fixing holes, allowing the spring rod to be easily inserted and fixed between pieces without the need for thread fixation, forming a closed curve configuration that simplifies assembly and reduces wear and rattling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If lever sections are fixed to sliders using threads, then the spring rod can be assembled with the band, but the number of manufacturing steps increases and the yield decreases
Solution Approach 1:
The invention extracts and eliminates the threaded connection mechanism between the lever section and slider. Instead of using threads to fix the lever section to the slider, the design allows the lever section to be directly integrated with the slider body, removing the fastening step and simplifying the assembly process while maintaining structural integrity.
Solution Approach 2:
The invention merges the lever section and slider into a more integrated structure where the lever section is formed as an integral part of the slider or directly connected without separate fastening components. This consolidation eliminates the need for threaded connections and reduces the number of assembly steps.
2Stability of the object's composition
If lever sections are small parts requiring thread fixation, then the spring rod structure is stable, but the assembly complexity increases
Solution Approach 1:
The invention removes the threaded connection system from the lever section assembly, eliminating the complexity of aligning and fastening small parts with threads while maintaining the structural stability needed for the spring rod to function properly.
Solution Approach 2:
The lever section is designed to self-align and self-secure with the slider through integrated features such as recesses and protrusions, eliminating the need for external fastening operations and reducing assembly complexity while ensuring stable connection.
3Ease of manufacture
If the spring rod uses traditional insertion method through holes, then the band can be assembled, but wear and rattling occur
Solution Approach 1:
The invention employs a nested structure where the spring rod is received within a recess of the band piece, and the lever section is nested within the slider. This nested arrangement provides better fit and reduces clearance, preventing rattling and wear while maintaining ease of assembly.
Solution Approach 2:
The band piece incorporates a recess structure that flexibly accommodates the spring rod, allowing for precise positioning and secure fitting without rigid threaded connections, thereby reducing wear and preventing rattling during operation.
Data Source
AI summary
A band includes a spring rod including a first operation lever linked to a first slider and a second operation lever linked to a second slider, a first piece including a first portion, a second portion, and a linkage section that links the first portion and the second portion to each other, the first piece having a first recess in each of the first portion and the second portion, and a second piece disposed between the first portion and the second portion, the second piece having a second recess. The spring rod is disposed in a closed curve that is the combination of a left first recess, a right first recess, and the second recess in the side view viewed in an axial direction of the spring rod. The second piece is disposed between the first operation lever and the second operation lever.