Elastic Press Pad for Sewing Machine Throat Plate
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Solution Overview
Problem
Existing punching devices attached to sewing machines cannot adjust to varying textile thicknesses, leading to potential material slippage and accidental collisions between needles and the press pad, and fail to prevent felting of materials underneath the throat plate.
Innovation Solution
A punching device with an adjustable and elastic connection between the support and body, featuring an axial extension of penetrating holes in the throat plate, allowing precise adjustment to textile thickness and preventing accidental collisions and felting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed press pad is used in punching devices, then the structure is simple, but it cannot adapt to varying textile thicknesses causing material slippage and accidental needle collisions
Solution Approach 1:
The press pad is made movable rather than fixed, allowing it to adjust vertically to accommodate different textile thicknesses. The elastic element enables the press pad to move downward when textiles are placed and return to its original position, providing adaptability while maintaining a relatively simple overall structure.
Solution Approach 2:
The position of the press pad is changed dynamically through the elastic element, allowing the pressing force and position to adapt to varying material thicknesses. This parameter change enables the device to handle different textile configurations without requiring complex adjustment mechanisms.
2Adaptability or versatility
If the press pad is made elastic and movable, then adaptability to material thickness is improved, but the risk of accidental collision between needles and press pad increases
Solution Approach 1:
The elastic element acts as a cushion that absorbs accidental collisions between the needle and press pad. When a needle accidentally contacts the press pad before proper positioning, the elastic element deforms and absorbs the impact energy, preventing damage to the needle or press pad while maintaining system reliability.
3Object-affected harmful factors
If the throat plate has standard penetration depth, then manufacturing is simple, but felting of materials underneath the throat plate cannot be prevented
Solution Approach 1:
The throat plate is divided into multiple sections with different penetration depths. Areas where felting should be prevented have deeper penetrations that extend through the throat plate, while other areas maintain standard depth. This segmentation allows selective prevention of felting in specific zones without requiring complete redesign of the entire throat plate.
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
Enables secure matting of textile materials of arbitrary thicknesses and prevents felting underneath the throat plate, ensuring precise feeding and protection of needles and the press pad from accidental movements.
Implementation Method 1
a spring (25) which is supported on the shoulder of the housing (11)
Data Source
AI summary
A punching device (1) is fastened at the pressure shaft of a sewing machine, vertically displaceable via a carrier (3). The vertical position of the press pad (35) at the body (33) can be adjusted by an adjustment screw (16) to the thickness of the textiles/work pieces to be processed.