Printer Lid Dual-Spring Mechanism for Bounce Suppression
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Solution Overview
Problem
Printers with operation parts mounted on opening/closing lids tend to experience bounce issues during opening due to the heavy weight, leading to unstable and fast motion closure.
Innovation Solution
A dual-spring mechanism is implemented, where a first spring applies a large urging force for stability and impact suppression during closure, and a second spring applies a closing force only after a predetermined angle, with contacting parts on the housing and lid interacting to absorb impact and prevent bounce.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a first spring member applies a large urging force in the opening direction to achieve stability improvement and impact suppression, then stability and impact suppression are improved, but the opening motion becomes too fast and bounce occurs at completion
Solution Approach 1:
The spring mechanism is segmented into two distinct spring members: a first spring member that provides large urging force for stability, and a second spring member that activates later to control opening speed and suppress bounce. This segmentation allows each spring to perform its specific function without interfering with the other, resolving the contradiction between stability and speed control.
Solution Approach 2:
The second spring member is configured to separate from the opening/closing lid before the first spring member fully engages, and then come into contact to apply closing direction urging force when the lid approaches the completion of opening motion. This preliminary positioning allows the second spring to activate at the optimal moment to control speed and suppress bounce.
2Reliability
If the second spring member applies urging force in the closing direction after the first predetermined angle, then bounce is suppressed, but the device complexity increases
Solution Approach 1:
The second spring member is integrated into the existing hinge structure, sharing the same mounting space and structural framework. The contacting part on the opening/closing lid and the contacted part on the housing are incorporated into the existing lid and housing structures respectively, rather than adding separate complex mechanisms. This merging approach minimizes the increase in device complexity while achieving bounce suppression.
3Reliability
If contacting parts are designed to interact after the second predetermined angle, then impact absorption is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The contacting part on the opening/closing lid and the contacted part on the housing are designed to come into contact before the full opening motion is completed, providing cushioning action in advance to absorb impact. This preliminary contact prevents hard impacts at the completion of opening motion, improving reliability while allowing for reasonable manufacturing tolerances.
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 dual-spring mechanism ensures a stable and controlled opening motion by applying the closing force near the completion of the opening motion, effectively suppressing bounce and maintaining a smooth operation.
Implementation Method 1
a first spring member that applies an urging force in an opening direction to the opening/closing lid
Implementation Method 2
a second spring member configured to apply an urging force in a closing direction to the opening/closing lid
Implementation Method 3
the contacting part of the opening/closing lid separated then comes into contact with the contacted part of the housing at the completion of the opening motion of the opening/closing lid to absorb the impact
Data Source
AI summary
The disclosure discloses a printer including an opening/closing lid, a first spring member, and a second spring member. The second spring member is separated from the opening/closing lid without applying an urging force in the closing direction to the time the opening/closing lid has pivoted from a closed state by a first predetermined angle and comes into contact with the opening/closing lid to apply the urging force when the opening/closing lid has pivoted from the closed state in the opening direction by the first predetermined angle. The opening/closing lid comprises a contacting part configured to be separated from a contacted part of the housing in the closed state, and to come into contact with the contacted part from the time the opening/closing lid has pivoted from the closed state by a second predetermined angle to the time the opening/closing lid has pivoted by a third predetermined angle.