Hinge Cable Protection Film Layout for Wide-Angle Chassis Rotation
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Solution Overview
Problem
Existing laptop PCs with rotation angles beyond 130 degrees face challenges in securing space for the S-shaped extra length of flat cables due to the increased size and tensioned protection films crossing linearly, exposing the cables and limiting the rotation angle range.
Innovation Solution
An electronic apparatus with a hinge connecting two chassis, featuring a flat cable protected by a laminated protection film, a tension roller, an idle roller, and a drawer body, which allows the cable to form an S-shape and maintain slack depending on the rotation angle, ensuring the cable is appropriately protected and housed within a wide rotation angle range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protection film is tensioned and pulled to cover the flat cable, then the flat cable is protected from exposure in the gap, but the space for containing the large S-shape increases when the rotation angle range is widened
Solution Approach 1:
The protection film is configured to dynamically change its state between tensioned (when chassis are close) and slack (when chassis are rotated apart). The film transitions from a taut configuration to a folded-back configuration, allowing it to adapt to different rotation angles without requiring additional space in any single state.
Solution Approach 2:
The protection film's physical state parameters change based on the rotation angle between chassis. When the rotation angle increases, the film transitions from a tensioned linear state to a folded-back state with an extra length space, allowing the S-shape to expand without increasing the bounding box volume.
2Adaptability or versatility
If the rotation angle range between chassis is widened, then the usability of the electronic apparatus is improved, but the S-shape for extra length absorption increases in size
Solution Approach 1:
The protection film utilizes the third dimension (vertical/folding direction) to accommodate the S-shape expansion. Instead of expanding the S-shape horizontally which would increase the bounding box, the film folds back on itself vertically, creating an extra length space that absorbs the S-shape growth without increasing the overall device volume.
3Device complexity
If the protection film crosses the space linearly, then the structure is simple, but the space for containing the large S-shape cannot be secured when rotation angle is widened
Solution Approach 1:
The protection film is configured to nest within itself by folding back. The extra length space created by the folded-back film allows the S-shape to be contained within the film's own structure rather than requiring external space, maintaining a compact overall form while accommodating large rotation angles.
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 solution enables a wider rotation angle range between the chassis while effectively protecting the flat cable, preventing exposure and wear, and maintaining the cable's integrity through a winding mechanism that absorbs route length changes.
Implementation Method 1
a tension roller to which an end of the protection film is fixed and that biases the protection film so as to wind the protection film
Implementation Method 2
a hinge connecting the first chassis and the second chassis at respective connecting edges thereof relatively rotatably
Data Source
AI summary
An electronic apparatus includes: a first chassis; a second chassis; a hinge connecting the first chassis and the second chassis at respective connecting edges thereof relatively rotatably; a flat cable provided across the first chassis and the second chassis; a protection film laminated on the flat cable across the first chassis and the second chassis; a drawer body that is coaxial with the hinge and rotates integrally with the second chassis; a tension roller to which an end of the protection film is fixed and that biases the protection film so as to wind the protection film, in the first chassis; and an idle roller that relays to extend a route of the protection film between the drawer body and the tension roller, in the first chassis.