Disc Device Magazine Pullout Stiffness Weight Trade-off
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Solution Overview
Problem
Conventional disc devices face challenges in efficiently pulling out magazine units due to insufficient stiffness and weight distribution, leading to increased force requirements and reduced storage capacity.
Innovation Solution
The disc device incorporates a rail with higher stiffness than the magazine holders, a box-shaped handle with a recessed engagement portion, and a connecting member to facilitate easy pullout of magazine units, allowing for increased storage capacity without additional mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If magazine holders are made lighter to reduce overall weight, then weight is reduced, but stiffness becomes insufficient making pullout difficult
Solution Approach 1:
The patent combines magazine holders made of resin (lightweight material) with a metal rail (high stiffness material) to create a composite structure. The resin magazine holders reduce weight while the metal rail provides the necessary stiffness and strength for pullout operation, resolving the contradiction between weight reduction and maintaining structural rigidity.
2Quantity of substance
If more magazines are stored in each magazine unit to increase storage capacity, then storage capacity increases, but the structure becomes heavier and harder to pull out
Solution Approach 1:
By using resin for magazine holders and a metal rail for the guiding structure, the patent achieves high storage capacity while keeping the overall weight manageable. The lightweight resin holders reduce the weight penalty of storing multiple magazines, while the stiff metal rail ensures smooth pullout operation despite the increased mass.
Solution Approach 2:
The patent extracts the stiffness function from the magazine holders themselves and places it in the separate metal rail structure. This allows the magazine holders to be optimized for weight reduction while the rail provides the necessary mechanical strength for operation, enabling high storage capacity without compromising ease of pullout.
3Ease of operation
If conventional handle designs are used, then manufacturing is simple, but pullout operation requires excessive force
Solution Approach 1:
The patent extends the handle in the width direction (lateral dimension) rather than only in the depth direction. This dimensional change creates a larger engagement area for the user's fingers, providing better leverage and reducing the force required for pullout operation, while the box-shaped structure maintains manufacturing simplicity.
Data Source
AI summary
A disc device of the present disclosure includes a plurality of magazine units aligned in height direction of the disc device. Each of the magazine units includes a plurality of magazine holders each storing at least one magazine, a rail that is slidable in depth direction of the disc device along a side of a housing of the disc device and has higher stiffness than the magazine holders, and a box-shaped handle mounted to a front end of the rail to extend in width direction of the disc device. The plurality of magazine holders is arranged in depth direction of the disc device. The rail holds the plurality of magazine holders at one side of the magazine holder. The handle extends from the front end of the rail toward a free-end side of the magazine holders and includes a recessed engagement portion that admits a finger in depth direction of the disc device and enables the finger to engage when each of the magazine units is pulled out in depth direction of the disc device.