Undershirt Notch Design Prevents Bunching and Rolling

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Solution Overview

Problem

Men's undergarments often become untucked during normal movements, causing discomfort and potentially leading to the formal shirt becoming untucked as well, and extending the length of the undershirt can result in bunching and rolling in the pelvic region.

Innovation Solution

The design incorporates a notch at the pelvic region with parallel and rounded edges, reducing interference with other clothing features and allowing for expansion over the hips, combined with a tapering shape and serge stitching to prevent bunching and tangling, while maintaining the undershirt's tuck without rolling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of stationary object

If the length of the undershirt is extended to prevent it from becoming untucked, then the undershirt can stay tucked longer, but it causes bunching and rolling in the pelvic region

Engineering Contradiction:

Improveduration of tuckVSAvoidbunching and rolling

Core Design Contradiction:

Duration of action of stationary objectVSShape

Solution Approach 1:

The bottom hem of the undershirt is segmented into two distinct portions: a first portion with a first length and a second portion with a second length that is shorter than the first length. This segmentation allows the garment to maintain a tucked position without excessive material that would cause bunching and rolling in the pelvic region.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the bottom hem are given different lengths to suit different functional requirements. The first portion (longer) prevents the undershirt from becoming untucked, while the second portion (shorter) prevents bunching and rolling in the pelvic region. This local differentiation of quality resolves the contradiction between maintaining tuck duration and avoiding shape distortion.

Inventive Principle:

Principle #3Local quality

2Ease of operation

If the undershirt is designed to stay tucked, then comfort is improved, but it may interfere with other clothing items such as zippers and buttons

Engineering Contradiction:

ImprovecomfortVSAvoidinterference with clothing features

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The bottom hem incorporates a second portion with a shorter length specifically positioned to avoid interference with pelvic region clothing features such as zippers and buttons. This local modification maintains the overall tucked position for comfort while eliminating the harmful interference effect in critical areas.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS8578518B1Stay tuck shirt

Publication Date: 2013.11.12 PFLUG STUART I

AI summary

A garment is disclosed including a tubular body portion having a top end and a bottom end, the garment defining a body opening proximate the bottom end, a neck opening proximate the top end, and at least two sleeve openings proximate the top end, wherein the bottom end of the tubular body portion defines a notch, the notch having a terminal edge and two opposing side edges of about equal length, wherein a linear distance separates the opposing side edges, the linear distance being substantially consistent along the about equal length thereby defining substantially parallel opposing side edges.