Lateral Illumination Device for Multineedle Sewing Machines
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Solution Overview
Problem
Conventional multineedle sewing machines face issues where the illumination device hinders the hooking of needle thread or exchange of needles, and the illuminance at the needle drop position is reduced due to the movement of the needle bar case.
Innovation Solution
An illumination device with a light source positioned laterally on the needle bar case, equipped with a light amount adjusting unit and control unit, which maintains predetermined illuminance near the needle drop position by adjusting light emission in sync with the needle bar case movement, ensuring unobstructed access for needle thread hooking and exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the illumination device is positioned at the peripheral side near the needles, then the needle thread passage is sufficiently illuminated, but the illumination device hinders the hooking of needle thread or exchange of needles
Solution Approach 1:
The illumination device is made movable relative to the needle bar case through a positioning mechanism, allowing it to dynamically adjust its position between obstructing the needle thread passage and maintaining proper illumination, thereby resolving the contradiction between lighting quality and operational accessibility
Solution Approach 2:
A positioning mechanism serves as an intermediary between the illumination device and the needle bar case, enabling controlled movement that balances the conflicting requirements of illumination intensity and ease of operation for needle thread hooking and needle exchange
2Stability of the object's composition
If the illumination device is fixed to the needle bar case, then it moves together with the needle bar case, but the illuminated area shifts from the needle drop position reducing illuminance at the needle drop position
Solution Approach 1:
The illumination device transitions from a fixed mounting to a dynamically adjustable positioning system that can move independently or in coordination with the needle bar case, maintaining constant illuminance at the needle drop position regardless of needle bar case movement
Solution Approach 2:
The positioning mechanism incorporates feedback control that detects the position of the needle bar case and adjusts the illumination device's position accordingly, ensuring the illuminated area remains aligned with the needle drop position and maintaining optimal illuminance levels
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
The solution prevents illumination device interference with needle thread hooking and maintains consistent illuminance at the needle drop position, even during needle bar case movement, enhancing operational efficiency and energy savings.
Implementation Method 1
an illuminating member having a light source and provided at a lateral side of the needle bar case
Data Source
AI summary
An illumination device for a multineedle sewing machine includes an illuminating member which has a light source and located at a lateral side of a needle bar case and is disposed so as to open portions of needle bars and portions of needles, a light amount adjusting unit which adjusts an amount of light of the light source, and a control unit which controls the light amount adjusting unit with movement of the needle bar case by the needle bar case moving mechanism together with the illuminating member so that a predetermined illuminance is maintained at least in part of an illuminated area which is illuminated by the light source. The part of the illuminated area is located near the needle drop position.