Movement Detector Housing With Perpendicular Presser Foot Insertion
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Solution Overview
Problem
The difficulty in attaching and detaching a presser foot to and from a sewing machine due to interference with thick fabrics and other machine components, making the process cumbersome.
Innovation Solution
A movement detector with a housing that includes a wall surface with an insertion opening for the presser foot, allowing easy attachment and detachment in a perpendicular direction, and a connection plate to prevent interference with other machine parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the presser support portion is attached and detached by moving in the emission direction (vertical direction), then the attachment and detachment mechanism is simple, but the fabric becomes an obstacle when thick fabric is used, making it difficult to attach and detach
Solution Approach 1:
The patent changes the attachment direction from the emission direction (vertical) to a direction perpendicular to the emission direction (horizontal). The insertion opening is formed in the horizontal direction, allowing the presser foot to be inserted horizontally rather than vertically, thus avoiding interference with thick fabric placed below the sensor.
2Device complexity
If the presser foot is inserted through the housing from the emission direction, then the structure is simple, but the presser foot contacts and interferes with other machine components in the detachment direction
Solution Approach 1:
The patent reorients the insertion opening to be perpendicular to the emission direction. This dimensional change allows the presser foot to be inserted horizontally while other machine components (such as needle bars) are positioned in the vertical emission direction, thereby eliminating spatial conflict and interference between components.
3Measurement precision
If the gap between the main body and thick fabric is small, then the sensor can detect fabric movement accurately, but the fabric becomes an obstacle when attaching and detaching the presser support portion
Solution Approach 1:
The patent resolves this contradiction by changing the attachment direction from vertical (emission direction) to horizontal (perpendicular to emission direction). This allows the sensor to maintain its optimal position for detecting fabric movement while the presser foot can be easily attached and detached horizontally without being blocked by thick fabric in the vertical path.
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
Facilitates easy and interference-free attachment and detachment of the presser foot, enhancing usability and operation efficiency of the sewing machine.
Implementation Method 1
The sensor is configured to emit light toward a sewing workpiece and to detect the light reflected from the sewing workpiece to detect a movement amount of the sewing workpiece
Data Source
AI summary
A movement detector is attachable to a presser bar of a sewing machine. The movement detector includes a sensor and a housing. The sensor is configured to emit light toward a sewing workpiece and to detect the light reflected from the sewing workpiece to detect a movement amount of the sewing workpiece. The housing accommodates the sensor. The housing includes a wall surface spaced from the sensor in a detachment direction. The detachment direction is perpendicular to an emission direction in which the sensor emits the light. The wall surface is formed with an insertion opening for inserting a presser foot.