Printer Cover Adjustment Mechanism Using Elongated Holes
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Solution Overview
Problem
Existing printing apparatuses face issues with the cover not opening and closing appropriately due to varying dimensions of the frame and cover components, leading to potential misalignment and operational difficulties.
Innovation Solution
The printing apparatus incorporates an open-close mechanism with a base, holder, shaft, arm, and lockscrew, featuring elongated attachment and holder holes, and guide holes to allow precise adjustment and alignment of the cover relative to the frame, ensuring proper opening and closing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the cover is attached to the frame with fixed holes, then the structure is simple and rigid, but the cover cannot be adjusted to accommodate varying dimensions and cannot open and close appropriately
Solution Approach 1:
The patent applies the dynamics principle by using elongated holes instead of fixed circular holes in the attachment mechanism. The holder includes an elongated hole and the frame includes an elongated hole, allowing the holder to move along the elongated direction to adjust the cover position. This dynamic adjustment capability resolves the contradiction by enabling adaptability while maintaining a relatively simple structure.
Solution Approach 2:
The patent applies parameter changes by modifying the shape of the attachment holes from circular to elongated. This geometric parameter change allows the attachment mechanism to accommodate varying dimensions of the frame and cover, enabling the cover to open and close appropriately while keeping the overall mechanism simple.
2Reliability
If the cover dimensions and frame dimensions vary, then different configurations are needed, but fixed attachment holes prevent proper opening and closing operation
Solution Approach 1:
The elongated holes in both the holder and frame allow for dynamic adjustment of the holder position along the elongated direction. This enables the mechanism to accommodate variations in frame and cover dimensions while ensuring reliable opening and closing operation through the guided movement provided by the elongated hole geometry.
Solution Approach 2:
The elongated hole acts as an intermediary element between the holder and frame, allowing for dimensional variations to be absorbed while maintaining proper mechanical connection. The shape of the elongated hole mediates between the need for fixed connection and the need for dimensional accommodation.
3Manufacturing precision
If standard attachment holes are used, then manufacturing is simple, but alignment precision between cover and frame is insufficient
Solution Approach 1:
The patent changes the geometric parameter of the attachment holes from circular to elongated shape. This parameter change improves alignment precision by providing a guided direction for the holder movement while maintaining ease of manufacture as the elongated hole is a simple geometric modification that does not require complex manufacturing processes.
Data Source
AI summary
A printing apparatus includes a printing unit, a frame, a cover configured to open and close relative to the frame, and an open-close mechanism. The open-close mechanism includes a base attached to the frame, a holder attached to the base, a shaft attached to the holder, an arm attached to the shaft, the cover being attached to the arm, and a lockscrew configured to fix the holder to the base. The base includes an attachment hole used to attach the holder to the base, and a protrusion protruding toward the holder. The holder includes a holder hole overlapping with the attachment hole, and a guide hole into which the protrusion is inserted. The guide hole is an elongated hole elongated in one direction. The holder hole is an elongated hole elongated in the one direction. The lockscrew is inserted into the attachment hole and the holder hole.