Printer Detection Device Coaxial Elastic Torque Mechanism
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Solution Overview
Problem
Conventional detection devices in printers face issues with inconsistent detection sensitivity and delayed response due to non-parallel force direction from tension springs, leading to potential high-speed collisions and damage.
Innovation Solution
A detection device with coaxial elastic structures, featuring spiral flexible portions on a rotation shaft and a detection plate connected to the frame, providing consistent initial torque and reducing friction, allowing for immediate detection of abnormal objects and minimizing noise from axial vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tension spring is used to provide initial torque to the detection plate, then the detection device can detect abnormal objects, but the force direction is not parallel to the detection plate causing inconsistent detection sensitivity and delayed response
Solution Approach 1:
The tension spring is segmented into multiple spring segments that are distributed around the rotation shaft. Each spring segment applies force radially inward toward the shaft center, and the combined effect provides consistent initial torque regardless of the detection plate's rotational position, eliminating the directional force problem of conventional single springs
Solution Approach 2:
The spring segments are arranged in a circular pattern around the rotation shaft, with their attachment points forming a radial configuration. This curved/spherical arrangement ensures that the force vectors from all spring segments converge toward the center, providing consistent torque in all rotational positions of the detection plate
2Device complexity
If the tension spring is connected to the lateral side of the detection plate, then the device structure can be simplified, but the initial torque acts toward a specific direction causing detection sensitivity inconsistency during reciprocation
Solution Approach 1:
Instead of a single spring connected to one point on the detection plate, the spring system is segmented into multiple independent spring segments, each connected to different radial positions around the rotation shaft. This segmentation distributes the torque application points uniformly, eliminating directional bias while maintaining structural simplicity
Solution Approach 2:
Multiple spring segments are merged into a unified radial force system where all segments work together to provide consistent initial torque. The combined effect of all spring segments creates a balanced torque distribution that remains consistent regardless of the detection plate's position during reciprocation
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
Ensures timely detection of abnormal objects, preventing collisions and damage by maintaining consistent detection sensitivity and reducing friction, while also addressing noise issues during high-speed operations.
Implementation Method 1
the at least two spiral flexible portions on the rotation shaft are deformed, and the central axis of the at least two spiral flexible portions and the rotation shaft is maintained. Thus, a stable initial torque is provided to the detection plate
Data Source
AI summary
A detection device is disclosed for detecting an abnormal object in a printing path. The detection device includes a first frame body, a first rotation shaft, two flexible portions and a detection module. The first rotation shaft is pivotally connected to the first frame body and has a first central axis. The two flexible portions are disposed at two opposite ends of the first rotation shaft along the first central axis, to provide an initial torque. Each flexible portion is connected between the first rotation shaft and the first frame body. The detection module includes a detection plate connected to the first rotation shaft. When the detection plate is forced by the abnormal object, the detection plate drives the first rotation shaft against the initial torque to rotate around the first central axis, so that the detection module detects the rotation of the first rotation shaft and the detection plate.