Optical Fiber Cutter Blade Positioning With Friction Release
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Solution Overview
Problem
Existing cutting devices for optical fibers face challenges in maintaining precise positioning and easy rotation of the blade member due to manufacturing inaccuracies, leading to inconsistent scratch depth and poor cutting quality.
Innovation Solution
A cutting device with a disc-shaped blade member positioned by a positioning member and supported by a height-adjustable support part, using elastic members for precise surface and point contacts, and a rotation mechanism that allows easy rotation by releasing contact with the positioning portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the blade member is pressed against the positioning portion to restrict its position, then positioning precision is improved, but large force is required to rotate the blade member, deteriorating operability
Solution Approach 1:
The support part is designed to be movable between a first position (before cutting) and a second position (after cutting). When moved to the second position, the support part releases the blade member from the positioning portion, allowing easy rotation. When moved to the first position, the support part contacts the positioning portion to restrict blade member position. This dynamic positioning enables both high positioning precision during cutting and easy rotation during maintenance.
2Ease of operation
If the pressing force of the blade member against the positioning portion is weakened, then operability is improved, but the blade member becomes misaligned or rotates unintentionally, resulting in poor positioning precision
Solution Approach 1:
The support part dynamically adjusts its position to control the pressing force. At the first position, the support part maintains appropriate contact with the positioning portion to ensure positioning precision. At the second position, the support part releases the blade member, allowing rotation without requiring continuous pressing force. This eliminates the need to continuously apply force while preventing unintentional rotation during normal operation.
3Reliability
If the blade member is rotated to replace the contact position with the optical fiber, then cutting quality consistency is improved, but the rotational axis may become off-center and eccentric, changing the blade member position and scratch depth
Solution Approach 1:
The support part is designed to move between positions to release and constrain the blade member. When the blade member needs to be rotated to replace the contact position, the support part moves to the second position to release the blade member, allowing rotation without constraining the rotational axis. After rotation, the support part moves to the first position to constrain the blade member at the new position, ensuring consistent scratch depth. This dynamic constraint release enables both rotation for position replacement and precision for consistent cutting.
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 high-precision positioning and easy rotation of the blade member, maintaining consistent scratch depth, improving cutting quality and reducing manufacturing complexity and costs.
Implementation Method 1
a first elastic member that presses the blade member toward the slit so that a tapered portion of the blade member is positioned by coming into contact with the positioning portion on an inner surface side of the slit
Implementation Method 2
a support part lowering mechanism that is provided on the main body and can push down the support part in a direction opposite to the positioning portion
Implementation Method 3
When the support part lowering mechanism lowers the support part to release the contact between the tapered portion of the blade member and the positioning portion, the rotation mechanism can rotate the blade member
Data Source
AI summary
A support part is disposed so as to be changeable in height with respect to a base, and supports a blade member. The support part is pressed, by an elastic member, upward relative to the base. A positioning member is fixed to the base, and thus the blade member fixed to the support part is pressed above the positioning member. When the support part is lowered by a support part lowering mechanism, contact between a tapered part of the blade member and the positioning member is released. Thus, friction between the blade member and a projection is removed, and the blade member can be rotated by a rotation mechanism.