Printer Blade Load Distribution via Reciprocating Motion
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Solution Overview
Problem
Conventional printers apply both cutting and pushing loads to the driving mechanism, increasing the maximum load required to move the movable blade, which can be inefficient and potentially strain the system.
Innovation Solution
The printer uses a driving force transferring mechanism to move the movable blade in a backward direction, distributing the load and using a pushing member to push cut-off papers into a stacking portion without an additional power source, reducing the load on the driving mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the movable blade pushes paper toward the paper stacking portion during forward movement, then no additional power source is needed, but the maximum load on the driving means increases due to combined cutting and pushing loads
Solution Approach 1:
The patent divides the blade movement into separate forward and backward phases with distinct functions. The forward movement performs cutting only, while the backward movement performs pushing. This segmentation separates the cutting load and pushing load into different time periods, reducing the peak load on the driving means while maintaining the benefit of using a single power source.
Solution Approach 2:
The blade performs periodic reciprocating movements where the pushing action occurs during the backward movement phase rather than the forward phase. This periodic alternation between cutting (forward) and pushing (backward) allows the driving means to handle only cutting load during forward stroke, reducing maximum load while still achieving paper transport without additional power sources.
2Productivity
If the movable blade cuts paper while moving forward, then cutting function is achieved, but the driving means must handle both cutting load and pushing load simultaneously
Solution Approach 1:
The patent segments the blade's reciprocating motion into functionally distinct phases: forward movement dedicated to cutting and backward movement dedicated to pushing. This temporal segmentation ensures that cutting and pushing loads do not overlap, allowing the driving means to handle only the cutting load during the forward stroke, thereby reducing the maximum load requirement while maintaining effective cutting functionality.
3Force
If the pushing member is driven by the backward movement of the movable blade, then the load is distributed and maximum load is reduced, but a driving force transferring mechanism is required
Solution Approach 1:
The patent merges the driving functions by using the same driving means to power both the movable blade and the pushing member through a driving force transferring mechanism. The backward movement of the blade, which would otherwise be a idle return stroke, is utilized to drive the pushing member via the transfer mechanism. This combining of functions reduces the maximum load on the driving means while the transfer mechanism remains relatively simple, connecting the blade's backward motion to the pushing member's rotation.
Solution Approach 2:
The system utilizes the blade's own backward movement to drive the pushing member, making the pushing function self-powered without requiring an additional independent power source. The driving force transferring mechanism captures the kinetic energy from the blade's return stroke and converts it to rotational motion of the pushing member, allowing the system to serve itself by using waste motion for useful work.
Data Source
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AI summary
Provided is a printer in which a cut-off paper is pushed into a paper stacking portion without an additional power source while reducing the maximum load applied to driving means for driving a movable blade. A printer 1 includes: a movable blade 161 for cutting a paper P1 disposed between a fixed blade and a movable blade as it moves in a forward direction and separating a printed part as a cut-off paper; driving means 162 for moving the movable blade 161 in a reciprocating manner; a pushing member 72 which is driven to push a cut-off paper P2 in a thickness direction of the cut-off paper P2; a paper stacking portion 77 for stacking the cut-off paper P2 pushed by the pushing member 72; and a driving force transferring mechanism 70 for transferring a driving force of the driving means 162 to the pushing member 72 to drive the pushing member 72.