Cable Buckling Prevention in Scanning Device Reciprocating Mechanism
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Solution Overview
Problem
Scanning devices face issues with cable buckling due to frictional resistance when the movable body reciprocates, causing the curved portion of the cable to contact and be restricted by structural members, leading to inefficient movement.
Innovation Solution
Incorporating an elastic member that is fixed to one structural member and engaged with the cable, exerting a force opposite to the curving direction of the cable, allowing it to maintain a straight posture and prevent buckling during reciprocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the cable is allowed to follow the reciprocating movement of the image sensor freely, then the cable can accommodate the movement, but the cable diameter of the curved portion becomes large and contacts the platen glass causing frictional resistance and buckling
Solution Approach 1:
The elastic member is pre-installed on the cable to exert a preliminary urging force that counteracts the tendency of the curved portion to expand and contact the platen glass. This preliminary action prevents frictional resistance and buckling before they occur during reciprocating movement.
Solution Approach 2:
The elastic member changes the mechanical parameters of the cable by introducing a restoring force that maintains the cable diameter within an allowable range. This parameter change prevents the cable from contacting structural members and reduces frictional resistance during movement.
2Object-affected harmful factors
If the cable is made with higher bending strength to prevent contact with platen glass, then frictional resistance is reduced, but the cable cannot smoothly follow the reciprocating movement of the image sensor
Solution Approach 1:
The elastic member dynamically adjusts the cable's effective bending strength by exerting an urging force that maintains the cable within an allowable diameter range. This allows the cable to follow reciprocating movement smoothly while preventing contact with the platen glass, resolving the contradiction between bending strength and movement smoothness.
3Object-affected harmful factors
If the cable diameter of the curved portion is kept small to avoid contact with platen glass, then frictional resistance is reduced, but the cable cannot accommodate the reciprocating movement of the image sensor
Solution Approach 1:
The elastic member provides a preliminary restoring force that prevents the curved portion of the cable from expanding to contact the platen glass. This allows the cable to accommodate reciprocating movement while maintaining a diameter that avoids frictional resistance.
Solution Approach 2:
The elastic member dynamically controls the cable diameter parameter, ensuring it remains within an allowable range that prevents contact with the platen glass while still accommodating the reciprocating movement of the image sensor.
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 elastic member ensures smooth movement of the cable by maintaining tension and preventing contact with structural members, thereby reducing friction and preventing buckling, ensuring reliable operation of the scanning device.
Implementation Method 1
an elastic member that is fixed to one structural member and engaged with the cable, exerting a force opposite to the curving direction of the cable
Data Source
AI summary
A scanning device may include a first structural member and a second structural member, a movable body that is configured to reciprocate between the first structural member and the second structural member, and a cable of which a first end is fixed to one of the first and second structural members and a second end fixed to the movable body. The cable may have a curved portion between the first end and the second end thereof. The scanning device may further include an elastic member of which a first end portion is fixed to one of the first and second structural members to which the first end of the cable is fixed, and a second end portion is engaged to the curved portion. The elastic member may be configured to elastically urge the cable in a direction opposite to the curving direction of the curved portion.