Sewing Machine Projection and Display for Stitch Positioning
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Solution Overview
Problem
Users find it difficult to understand the positional relationship between the projected mark and the planned stitch type on sewing machines, leading to decreased operating efficiency during cloth positioning.
Innovation Solution
A sewing machine equipped with a display portion, projection portion, processor, and memory that projects a mark onto the sewing machine bed and displays information representing the positional relationship between the planned stitch type and the projected mark, allowing users to easily check and adjust the alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mark is projected onto the sewing machine bed to indicate positioning reference, then the positioning accuracy is improved, but the user cannot easily understand the positional relationship between the projected mark and the planned stitch type
Solution Approach 1:
The patent creates a visual copy of the stitch type shape on the display portion that replicates the spatial relationship between the needle drop point and the mark position. This graphical representation allows users to understand the positional relationship without physically measuring or calculating distances on the sewing machine bed.
Solution Approach 2:
The display portion acts as an intermediary between the physical mark projection and the user's understanding. It translates the three-dimensional spatial relationship on the sewing machine bed into a two-dimensional visual representation that is easier to comprehend, showing the stitch type shape overlaid with mark position indicators.
2Adaptability or versatility
If the needle bar supporting platform is made swingable to move the needle drop point, then the adaptability to different stitch types is improved, but the complexity of the device increases
Solution Approach 1:
The patent implements a swingable needle bar supporting platform that can rotate about the spindle axis, transforming a static needle position into a dynamic one. This allows the needle drop point to be moved to different positions corresponding to various stitch types (e.g., straight stitch, zigzag stitch, decorative stitches) without changing the physical stitch formation mechanism.
Solution Approach 2:
The swingable platform mechanism serves multiple functions: it positions the needle for different stitch types, supports the needle bar movement, and enables both lateral and rotational positioning. This single mechanism replaces what would otherwise require multiple separate adjustment systems for different stitch configurations.
3Illumination intensity
If the mark projection angle is adjusted to maintain brightness, then the illumination consistency is improved, but the positioning relationship between mark and stitch type becomes less intuitive
Solution Approach 1:
The display portion provides visual feedback to the user by showing the stitch type shape with overlaid mark position indicators. This feedback mechanism compensates for the loss of intuitive positional information by explicitly displaying where marks will be projected relative to the stitch pattern, regardless of the projection angle used to maintain brightness.
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
This configuration enhances user understanding of the positional relationship, improving operating efficiency by providing visual feedback and allowing precise positioning of the work cloth.
Implementation Method 1
a mark projection device that may project a point mark that is configured from a slit beam along a Y axis and a slit beam along an X axis
Data Source
AI summary
A sewing machine includes a display, a projection portion, a processor, and a memory. The display is configured to display display information related to sewing. The projection portion is configured to project a mark having a predetermined shape toward a sewing machine bed. The memory is configured to store computer-readable instructions therein that, when executed by the processor, cause the sewing machine to project, by the projection portion, the mark toward the sewing machine bed, and display by the display, mark display information that represents the mark and stitch type display information of a planned stitch type to be sewn, in a first positional relationship that corresponds to a second positional relationship between the position of the planned stitch type to be sewn and the position of the mark configured to be projected on the sewing machine bed.