Disk Drive Detection Pin Guide Mechanism
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Solution Overview
Problem
Existing disk drive devices are prone to damage of the disk detection mechanism when a disk is shifted or roughly inserted, due to the pressing force exerted on the detection pin, which can lead to deformation or damage of the lever member and increased complexity with additional components like resin rollers or high spring loads.
Innovation Solution
A disk drive device configuration featuring a lever member, a detection pin supported in a cantilever fashion, and a pressing member that biases the lever toward an initial position, with an inclined guide section facing the detection pin to redirect forces away from the pin's midpoint, preventing deformation and damage by allowing smooth operation even with misaligned or rough disk insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a detection pin is used to detect disk insertion and ejection, then disk insertion and ejection can be detected, but the lever member may be damaged due to pressing force when a disk is shifted or roughly inserted
Solution Approach 1:
A resin roller is introduced as an intermediary component between the detection pin and the disk. The detection pin rotates this roller to detect disk insertion and ejection, rather than the detection pin directly contacting the disk. This mediator protects the detection pin from damage while maintaining detection functionality, as the roller can rotate freely and transmit rotational motion without transmitting harmful lateral forces to the detection pin.
Solution Approach 2:
The direct mechanical contact between the detection pin and disk is replaced with a rotational roller mechanism. Instead of the detection pin directly engaging with the disk edge, the system uses a roller that rotates in response to disk insertion, converting linear contact into rotational motion. This substitution reduces wear and damage risk on the detection pin while preserving the detection function.
2Reliability
If a resin roller is added to the detection pin to prevent damage, then the detection mechanism durability is improved, but the device complexity increases
Solution Approach 1:
The resin roller is integrated with the detection pin as a unified component. The roller is positioned on the detection pin such that the detection pin rotates the roller, combining the detection function and the protective roller function into a single integrated assembly. This merging approach minimizes additional parts while achieving both durability and detection functionality.
3Reliability
If the detection pin is supported by a spring with high spring load to prevent damage, then the detection mechanism durability is improved, but the ease of operation deteriorates due to increased resistance
Solution Approach 1:
The resin roller serves as a mediator that allows the detection pin to rotate without direct lateral contact with the disk. This rotational mechanism eliminates the need for high spring loads to prevent damage, as the roller naturally accommodates insertion forces through rotation. The result is smooth disk insertion operation without excessive resistance, while still protecting the detection mechanism.
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 the disk drive device to detect disk insertion and ejection without damaging the detection mechanism, reducing the need for additional components and simplifying assembly, while maintaining effective operation with normal and abnormal disk insertion scenarios.
Implementation Method 1
The roller bracket is biased by an elastic force of a spring in a direction in which the transport roller moves closer to the lower surface of the guide top
Implementation Method 2
each of the detection levers 102 is pulled by a tension force from the spring 104 and stays at an initial position
Data Source
AI summary
In a disk drive device, a guide section is formed to protrude from the front surface of a guide top and face a front panel of a frame member with a detection pin therebetween. The guide section forms an inclined side that faces a free end of the detection pin with a gap therebetween. If a disk is shifted from the middle of a disk insertion slot in the right-left direction and is inserted into the disk insertion slot, the detection pin is flexibly deformed by a disk insertion force and is brought into pressure contact with the inclined side. A component force is exerted on the detection pin in a direction in which the detection pin is moved away from the middle of the disk insertion slot in the width direction. The component force smoothly rotates a detection lever from an initial position to an operating position.