Guide Pin Positioning in Pivoting Recording Apparatus
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Solution Overview
Problem
In recording apparatuses, the guide pin interferes with the wall of the guide hole when the recording portion is pivoted relative to the support portion, compromising positioning accuracy and requiring a solution to prevent interference while maintaining engagement.
Innovation Solution
A movable member is positioned at one end of the guide hole orthogonal to the guide pin's direction, biasing the guide pin towards the other end of the guide hole, ensuring it contacts the end and preventing interference during pivotal movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the recording portion is pivoted relative to the support portion about a prescribed shaft to ensure maintenance space, then ease of operation is improved, but the guide pin interferes with the wall that defines the guide hole, worsening positioning accuracy
Solution Approach 1:
The guide hole is designed with a movable member that changes its configuration based on the pivotal position. When the recording portion is pivoted to the maintenance position, the movable member moves to allow the guide pin to clear the wall. When returned to the recording position, the movable member returns to its original position to maintain positioning accuracy. This dynamic adjustment resolves the contradiction between ease of operation and positioning precision.
Solution Approach 2:
The guide hole is divided into multiple sections: a first portion with a first cross-sectional shape that engages the guide pin during recording, and a second portion with a second cross-sectional shape that accommodates the guide pin during maintenance positioning. This segmentation allows different geometric configurations for different operational states, enabling both accurate positioning and interference-free maintenance access.
2Manufacturing precision
If the guide pin and guide hole are held in engagement to ensure positioning accuracy, then manufacturing precision is improved, but the guide pin interferes with the guide hole wall during pivotal movement, worsening reliability
Solution Approach 1:
The movable member dynamically adjusts the guide hole's cross-sectional shape based on the pivotal angle. During recording operations, the guide hole maintains its engagement shape for positioning accuracy. During maintenance pivoting, the movable member shifts to create clearance, preventing interference and damage. This dynamic behavior ensures both positioning accuracy and operational reliability.
Solution Approach 2:
The cross-sectional parameters of the guide hole are changed based on the operational state. The guide hole transitions between a first cross-sectional shape (for engagement and positioning) and a second cross-sectional shape (for maintenance access). This parameter change, controlled by the movable member's position, prevents interference while maintaining positioning functionality.
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 ensures accurate positioning of the recording and support portions by preventing interference between the guide pin and the guide hole's wall, maintaining engagement and enhancing operational reliability.
Implementation Method 1
the movable member is configured to bias the guide pin that is in engagement with the guide hole in a direction toward the other end of the guide hole such that the guide pin contacts the other end of the guide hole
Data Source
AI summary
A recording apparatus, including: a support portion; a recording portion; a first casing; a second casing; a positioning mechanism including a guide pin and a guide hole, for defining a relative position of the recording portion and the support portion by engagement of the guide pin and the guide hole when the second casing is positioned at a close position; and a movable member disposed at one end of the guide hole for moving in a direction away from the other end of the guide hole, so as to be retracted from a moving region of the guide pin that moves relative to the guide hole in association a pivotal movement of the second casing, wherein the movable member is for biasing the guide pin engaging the guide hole in a direction toward the other end of the guide hole such that the guide pin contacts the other end.