Printer Top Cover Opening Mechanism with Integrated Spanner
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Solution Overview
Problem
Traditional printer designs have an inconvenient upper cover opening mechanism that requires multiple operations to fully open, making it difficult to change printing paper rolls.
Innovation Solution
A printer with a cover-opening member hinged to the top cover, featuring a spanner and locking hook mechanism, and an elastic member for easy engagement and disengagement with the printer body, allowing the top cover to be opened in a single operation by rotating the cover-opening member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional locking hook and spanner mechanism is used, then the upper cover can be locked securely, but multiple operations are required to open the cover completely
Solution Approach 1:
The patent combines the locking hook and spanner into a single integrated cover-opening member that performs both locking and opening functions. The cover-opening member includes a locking portion that engages with the locking groove on the printer body, and when rotated, it automatically disengages the locking hook while simultaneously opening the upper cover in one continuous motion.
Solution Approach 2:
The cover-opening member is designed as a dynamic component that can rotate between different positions. It transitions from a locked position where the locking portion engages with the locking groove, to an unlocked position where rotation disengages the locking mechanism and opens the cover. This dynamic rotation enables the single-operation opening function.
2Device complexity
If the cover-opening member is integrated with the top cover, then the structure is simplified, but the locking mechanism may become less reliable
Solution Approach 1:
The cover-opening member is segmented into distinct functional portions: a locking portion with a locking hook, a spanner portion for manual operation, and a connecting portion that hinges to the top cover. This segmentation allows each portion to perform its specific function efficiently while maintaining overall structural simplicity and locking reliability.
Solution Approach 2:
The locking groove on the printer body serves as an intermediary element that receives and engages with the locking hook on the cover-opening member. This intermediary mechanism provides a reliable locking interface while allowing the cover-opening member to remain integrated with the top cover, balancing simplicity and reliability.
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
Simplifies the operation of opening the top cover, enabling complete access for paper changes without additional steps, while maintaining dust prevention and secure engagement.
Implementation Method 1
an elastic member (4) which has a predetermined deformation and is fixedly provided between the cover-opening member (3) below the hinging point and the top cover (2)
Implementation Method 2
the middle of the cover-opening member (3) is hinged to the top cover (2)
Implementation Method 3
a cover-opening member, wherein an opening is provided in the middle of the upper wall of the top cover
Data Source
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AI summary
A printer comprises: a printer body (1), a top cover (2) hinged to the rear portion of the printer body, and a cover-opening member (3). An opening (21) is formed in the middle of the upper wall of the top cover. The lower end of the cover-opening member (3) is passed through the opening (21) and engaged with the printer body (1). The middle of the cover-opening member (3) is hinged to the top cover (2). The lower end of the cover-opening member can be engaged with or disengaged from the printer body (1) as long as a user rotates the cover-opening member upward. The printer has a simple construct, and the user can open the top cover in a single operation.