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Ramp for magnetic disc apparatus

A technology of disk devices and ramps, applied in the configuration/installation of recording heads, structural parts of record carriers, data recording, etc.

Inactive Publication Date: 2014-04-16
NIPPON MEKTRON LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] And, regarding the composition of the slope, the composition disclosed in the following patent documents 1 to 5 is known at present, but no matter which one is not in order to reduce the slope Stepped structure is provided on the bottom of the rigid recessed disk insertion part

Method used

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  • Ramp for magnetic disc apparatus
  • Ramp for magnetic disc apparatus
  • Ramp for magnetic disc apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] The present invention includes the following embodiments.

[0052] (1) That is, in order to increase the shock resistance and reduce the rigidity, and in the case of retracting the disk insertion part near the sliding part, the duckbill part (tip part) where the dimensional accuracy is most required will be lost in the direction of the disk. Distortion occurs and dimensional stability deteriorates.

[0053] (2) For this purpose, the depth of the disk insertion portion near the sliding portion is maintained, and the depth of the disk insertion portion at other locations is reduced.

[0054] (3) Further, by retracting the disk insertion portion only from the highly rigid resin, the volume of the highly rigid resin decreases while the volume of the slidable resin remains the same. As a result, a step is formed on the bottom surface of the disk insertion portion. By reducing the volume of the highly rigid resin, the rigidity of the disk insertion portion can be reduced.

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Abstract

For cushioning a shock to prevent problems such as a reading error, a ramp for a magnetic disc apparatus is made of a resin material for forming a ramp main body and a material having higher rigidity than the resin material, disc facing surfaces in the disc insertion portion for inserting a magnetic disc is provided with disc contact portions made of the high rigidity material, a bottom surface portion of a concave portion of the disc insertion portion is constructed by a combination of a bottom surface portion made of the resin material and a bottom surface portion made of the high rigidity material, and a step structure is provided by arranging the bottom surface portion made of the high rigidity material at a position moved rearward in a depth direction of the concave portion in comparison with the bottom surface portion made of the resin material.

Description

technical field [0001] The present invention relates to a ramp used in a loading / unloading mechanism in a magnetic disk device such as a hard disk drive (HDD), and more specifically, to a ramp molded as a two-color molded product, wherein the The two-color molded product is formed of a resin material forming the ramp main body and a material having higher rigidity than the resin material. Background technique [0002] In recent years, HDDs have been used not only in personal computers but also in mobile home appliances such as music players and digital video cameras, and the impact resistance standards have become increasingly strict. Among them, such as Figure 5 As shown in (A) to (B), when the HDD is impacted, the disk a inside the casing bends, and the high-strength disk a made of glass or aluminum and the ramp made of resin (POM, LCP, etc.) with good sliding properties b contact, causing the phenomenon that the slope b wears a lot. In this case, scattering of a large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/54G11B21/12G11B21/22G11B33/00
CPCG11B5/54G11B21/22
Inventor 关庄太冈延由记清本修一十时道也中宫光裕住谷武次平松丈纪高桥功治
Owner NIPPON MEKTRON LTD
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