Violin Plate Alignment via Positioning Portions
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Solution Overview
Problem
Conventional violin manufacturing methods result in varying timbre due to the lack of precise alignment between the body and the top and back plates, leading to inconsistencies in sound quality.
Innovation Solution
The use of a body with first positioning portions and corresponding second positioning portions on the top and back plates, facilitated by dowels and adhesive, allows for precise alignment and fixing of the plates, thereby stabilizing the timbre.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the outer peripheral edges of the top plate and back plate are trimmed after fixing to the body, then the manufacturing process is simplified and alignment during fixing is not required, but the timbre of the violin varies due to inconsistent positional relationships
Solution Approach 1:
The patent applies preliminary action by pre-forming the outer peripheral edges of the top plate and back plate to the finished size before assembly, and by incorporating positioning portions and positioning holes in advance during mold fabrication. This eliminates the need for post-assembly trimming while ensuring precise positional relationships, thereby resolving the contradiction between manufacturing simplicity and positioning precision.
2Manufacturing precision
If high-precision alignment is performed during fixing of top and back plates to the body, then the timbre consistency is improved, but the manufacturing process becomes more complex and time-consuming
Solution Approach 1:
The patent implements self-service through self-positioning structures where the positioning portions on the top plate and back plate automatically align with the positioning holes on the body during assembly. This mechanical self-alignment eliminates the need for complex external alignment tools or procedures, achieving high positional precision while keeping the manufacturing process simple.
3Ease of manufacture
If the top plate and back plate are fixed to the body without positioning portions, then the manufacturing process is simpler, but the timbre varies due to inconsistent positional relationships
Solution Approach 1:
The patent applies segmentation by dividing the assembly system into distinct positioning components: positioning portions on the top plate and back plate, and corresponding positioning holes on the body. This segmentation creates dedicated alignment features that ensure consistent positional relationships, thereby improving timbre consistency while maintaining manufacturing simplicity.
Data Source
AI summary
An acoustic string instrument includes a top plate, a back plate, and a body disposed between the top plate and the back plate. The body has a plurality of first positioning portions. At least one of the top plate or the back plate, or both has a plurality of second positioning portions. The first positioning portions are fixed to the second positioning portions corresponding to the first positioning portions.