Sewing Machine Projector Arrangement for Long Pattern Projection
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Solution Overview
Problem
Existing sewing machines have limitations in projecting a wide variety of projection images due to the restricted dimensions of the projection area.
Innovation Solution
The sewing machine is designed with a projector arrangement that allows for a longer projection area in the short direction of the bed, where stitches are formed, enabling the projection of longer patterns and a wider variety of images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the projector is arranged on the arm closer to the needle bar, then the structure is more compact, but the projection area becomes restricted and cannot accommodate long patterns
Solution Approach 1:
The projector is arranged on the arm in the extending direction (longitudinal dimension) rather than in the forward feed direction (transverse dimension). This dimensional shift allows the projection area to extend longer in the forward feed direction, accommodating long patterns while maintaining a compact overall structure.
2Adaptability or versatility
If the projection area is extended in the forward feed direction, then long patterns can be projected, but the projector arrangement becomes more complex
Solution Approach 1:
The arm structure serves multiple functions: it supports the needle bar mechanism, provides mounting for the projector, and defines the projection area geometry. By utilizing the arm's extending direction for projector placement, the system achieves versatile image projection capability without adding separate structural components.
3Adaptability or versatility
If the light source is arranged in the forward feed direction or reverse feed direction with respect to the first lens, then long patterns in the stitch formation direction can be projected, but the projector design becomes more complex
Solution Approach 1:
The projector's optical parameters are configured such that the light source is positioned in the forward feed direction or reverse feed direction relative to the first lens. This parameter change in the optical arrangement enables long patterns to be projected along the stitch formation direction while keeping the projector's internal design manageable.
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 allows for the projection of images showing long patterns in the direction of stitch formation, thereby enhancing the capability to project a wider range of images compared to conventional sewing machines.
Implementation Method 1
a light source that outputs light guided to the first lens
Data Source
AI summary
A sewing machine includes a projector configured to project a projection image onto a projection area above a bed. The projector is arranged on a portion of an arm and includes a first lens, and a light source emitting light guided to the first lens. When a direction orthogonal to the extending direction and the up-down direction and toward a presser bar from a needle bar is defined as a forward feed direction, and a direction opposite the forward feed direction is defined as a reverse feed direction, the light source is arranged in the forward feed direction or the reverse feed direction with respect to the first lens, and a length of the projection area in a short direction of the bed is longer than a length of the projection area in a longitudinal direction of the bed.