Auxiliary Table Guide Structure for Collision-Free Sewing Machine Attachment
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Solution Overview
Problem
Conventional sewing machines with auxiliary tables face collisions with components like needle bars and presser bars due to the auxiliary table's inclination during attachment and detachment, which complicates the process and increases the risk of damage.
Innovation Solution
A sewing machine design featuring a guide member on the bed and an engaging member on the auxiliary table that limits the tilt of the auxiliary table within a predetermined range, allowing it to be easily attached and detached while preventing collisions with the sewing machine's components, using a sliding contact mechanism and a groove system to guide the auxiliary table between attachment and detachment positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the auxiliary table is made detachable for easy attachment and detachment, then the ease of operation is improved, but the auxiliary table may collide against components such as needle bars and presser bars due to inclination during movement
Solution Approach 1:
A guide member is introduced as an intermediary component between the auxiliary table and the sewing machine bed. The guide member includes a guide hole that receives the engaging protrusion of the auxiliary table, constraining its movement path. This intermediary structure ensures the auxiliary table moves along a safe trajectory without colliding with needle bars or presser bars, while still allowing easy attachment and detachment operations.
2Ease of operation
If the auxiliary table is inclined during movement for attachment and detachment, then the ease of operation is improved, but harmful factors such as collision with components increase
Solution Approach 1:
The guide member acts as a mediator that allows the auxiliary table to be inclined during attachment and detachment (improving ease of operation) while simultaneously preventing harmful collisions. The guide hole in the guide member restricts the inclination angle and movement path, ensuring the auxiliary table follows a predetermined safe trajectory that avoids needle bars and presser bars.
3Ease of operation
If the auxiliary table is moved relative to the sewing machine bed without guidance, then the ease of operation is improved, but the tilt of the auxiliary table becomes uncontrolled causing collision
Solution Approach 1:
The guide member serves as a stabilizing intermediary that provides controlled movement guidance. The guide hole geometry defines a specific movement path and angular range, ensuring the auxiliary table tilts within predetermined safe limits during attachment and detachment. This maintains operational ease while preventing excessive tilt that would cause collision with machine components.
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
The solution enables secure and reliable attachment and detachment of the auxiliary table without collisions, ensuring smooth operation and reducing the risk of damage to the machine's components, while also allowing for easy handling and efficient movement between positions.
Implementation Method 1
the engaging member has a sliding contact portion which is brought into sliding contact with the bearing portion
Implementation Method 2
a side plate which extends below the bearing portion in a front-back direction and has a groove guiding the engaging member from the first position to the second position
Data Source
AI summary
A sewing machine includes a sewing machine bed, an auxiliary table detachably attachable to the bed, a guide member guiding the table between a first position where the table is held in parallel to an upper surface of bed and a second position where the table is detachably attached to the bed, and an engaging member mounted on the table so as to engaging the guide member. The guide member and the engaging member are engaged with each other, so that a tilt of the table to the upper surface of bed is limited within a predetermined angular range when the table is positioned between the first and second positions. The guide member has a bearing portion and a side plate having a groove guiding the engaging member from the first to second positions. The engaging member has a sliding contact portion brought into sliding contact with the bearing portion.