CN101807407A - 负载杆、具备该负载杆的悬架以及悬架的制造方法 - Google Patents

负载杆、具备该负载杆的悬架以及悬架的制造方法 Download PDF

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CN101807407A
CN101807407A CN 200910006550 CN200910006550A CN101807407A CN 101807407 A CN101807407 A CN 101807407A CN 200910006550 CN200910006550 CN 200910006550 CN 200910006550 A CN200910006550 A CN 200910006550A CN 101807407 A CN101807407 A CN 101807407A
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load beam
vibration
damping sheet
suspension
pit part
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CN101807407B (zh
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池知洋一
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NHK Spring Co Ltd
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/4806Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
    • G11B5/4833Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/4902Electromagnet, transformer or inductor
    • Y10T29/49021Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49025Making disc drive
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/4902Electromagnet, transformer or inductor
    • Y10T29/49021Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49027Mounting preformed head/core onto other structure
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/4902Electromagnet, transformer or inductor
    • Y10T29/49021Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49027Mounting preformed head/core onto other structure
    • Y10T29/4903Mounting preformed head/core onto other structure with bonding
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/4902Electromagnet, transformer or inductor
    • Y10T29/49021Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49032Fabricating head structure or component thereof

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  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

本发明提供一种由粘贴减振片导致的变形少,具有稳定的特性的负载杆、悬架以及悬架的制造方法。负载杆,其构成支承磁头的悬架,由薄板弹簧构成,并形成有用于收容减振片的凹坑部。

Description

负载杆、具备该负载杆的悬架以及悬架的制造方法
技术领域
本发明涉及盘片装置的悬架中的负载杆、具备该负载杆的悬架以及悬架的制造方法。
背景技术
一直以来,硬盘驱动器(HDD)、光磁盘驱动器等磁盘装置用头在高速旋转的磁盘上保持微小间隔地浮动于磁盘上,读写磁盘上的信息。伴随近年来记录密度变高的发展趋势,头尺寸变小,上浮量也变小,为了正确地读写磁盘上的信息,抑制头部的振动进行精密地定位很重要。
悬架的构造,一般如图10所示那样,包含磁头1、支承磁头的悬架2、固定悬架的安装台3。此外,悬架2包含一般由精密的薄板弹簧构成的负载杆、底板(未图示)、柔性件(未图示)等。
上述头部,会从磁头1的驱动装置和使盘片旋转驱动的马达等受到振动,因此由板簧等形成的悬架2会变形,磁头1的位置偏离而容易产生读取误差和写入误差。在此,为了减少乃至消除悬架2的振动,提案有将如图11所示那样的由约束体15和粘弹性体16层叠而成的减振片14(也称作“缓冲器”)粘贴到悬架2的负载杆上的方法。
根据此方法,被夹在振动的悬架2与约束体15之间的粘弹性体16伴随着悬架2的振动变形而变形,产生内部抵抗(分子摩擦),由于将振动能量转化为热能,所以悬架2直接受到的振动能量大幅被减少,获得了减振效果。如图12所示,将减振片粘贴到悬架2的负载杆上后,与粘贴前相比较,通过缓冲效果,各模式的增益峰值都下降。
另外,在悬架中,如图3(A)、图4(A)所示那样,为了提高负载杆的刚性,立起负载杆的宽度方向的两边缘部(称为凸缘(rib)弯曲)。此外,为了保持磁头相对磁盘的适当的上浮量,负载杆的与台3接近的根部稍微弯曲(称为荷重弯曲)。这样,在该弯曲加工之前粘贴了减振片的情况下,在进行负载杆的凸缘弯曲和荷重弯曲时,减振片有可能会与弯曲工具发生干涉,因此在实际的制造工序中,如图9所示那样在对负载杆进行弯曲加工后粘贴减振片。
但是,在将减振片粘贴到负载杆上时,为了使减振片的粘弹性体粘结在负载杆上,必须以一定的荷重朝向负载杆推压减振片。这样,在弯曲加工负载杆后粘贴减振片时,会存在此时的推压力使负载杆形状变形的情况。当负载杆变形后,存在因为该变形而破坏了弹簧荷重等静态特性和共振等动态特性的问题。由此,会破坏悬架的商品性和使用特性。
此外,在将减振片粘贴到负载杆上时,减振片相对负载杆的错位也会影响悬架的特性,但是一直以来,由于在没有显示粘贴位置的平的薄板弹簧构成的负载杆上粘贴减振片,所以实际上正确的定位很困难。
此外,在弯曲加工负载杆后粘贴减振片的现有的制造工序中,立起的凸缘等会妨碍减振片的粘贴,此外,因为要在负载杆上一个一个地粘贴减振片,所以操作性差。
此外,在将减振片推压粘贴到负载杆上时,有时粘弹性体会由于较大的推压力而向周边较多地溢出。此时,虽然必须除去该溢出,但是这不仅很麻烦而且很难干净地除去。此外,在粘贴了减振片之后,存在以包围其周围部分(粘弹性体)的方式用树脂等涂覆材料对其进行覆盖的情况,但是由于涂覆材料的使用量多,所以不利于负载杆的轻量化。
专利文献1:JP特开平10-162532号公报
专利文献2:JP特开平9-91909号公报
发明内容
本发明是鉴于以上的情况而做出的,主要目的在于提供一种由粘贴减振片导致的变形少,具有稳定的特性的负载杆、悬架以及悬架的制造方法。
本发明的负载杆,是构成支承磁头的悬架、由薄板弹簧构成的负载杆,其形成有用于收容减振片的凹坑部。
上述凹坑部通过局部蚀刻形成,也可以通过模具加工形成。此外,还可以通过将2个薄板重合而形成,在其中1个薄板上形成有比减振片大的贯通孔。
优选上述凹坑部的深度大于等于粘贴后的减振片的厚度。
本发明的悬架,是支承磁头的悬架,其具备上述中任一项所述的负载杆,并且在上述凹坑部中粘贴有减振片。
在上述悬架的制造方法中,在负载杆的上述凹坑部中粘贴了减振片后,对负载杆进行弯曲加工。
在上述悬架的制造方法中,由薄板弹簧材料以连接状态形成多个上述负载杆,在各负载杆的上述凹坑部中粘贴了减振片后,对负载杆进行弯曲加工,并将负载杆个别地切割分离。
根据本发明的负载杆,由于在粘贴减振片的位置形成大于减振片的凹坑部,将减振片收容在该凹坑部内,因此在粘贴了减振片的状态下进行负载杆的弯曲加工时,可以避免减振片与弯曲工具发生干涉。因此,可以在弯曲加工负载杆前的平坦状态粘贴减振片,不会引起负载杆的变形,能够防止静态特性和动态特性的偏差。凹坑部只要具有能够收容减振片程度的尺寸即可,但是考虑到粘贴减振片时的操作性、粘弹性体的溢出等,优选形成得大于减振片。
此外,因为可以将凹坑部(例如局部蚀刻部)作为粘贴减振片时的引导件来使用,所以减振片相对负载杆的定位容易。
此外,可以在弯曲加工负载杆前的平坦状态粘贴减振片,所以容易实现粘贴的自动化。特别是,在弯曲加工前,由于可以在负载杆坯料(连接的状态)上进行减振片的粘贴,所以在更高速、更高精度、更低变形的状态下的粘贴自动化成为可能,操作性可以进一步提高。
此外,在将减振片推压粘贴到负载杆上时,粘弹性体会由于较大的推压力而向周边溢出,但是由于减振片收容在凹坑部中,所以在减振片与凹坑部的立壁之间出现沟,溢出部分被该沟收纳,从而防止了现在那样的较大的溢出。此外,如上所述那样由于在减振片周围出现沟,所以通过填充树脂来涂覆减振片周围(剖面)部分很容易,并且涂覆材料使用量很少即可完成涂覆。
此外,因减振材料增加的质量与因凹坑部减少的质量相抵,因此也有利于负载杆的轻量化。
附图说明
图1(A)是现有的粘贴了减振片的负载杆的示意主视图,(B)是本发明的粘贴了减振片的负载杆的示意主视图。
图2是本发明的负载杆的凹坑部的局部剖面示意图。
图3(A)是图1(A)的Ⅰ-Ⅰ剖面放大图,(B)是图1(B)的Ⅰ-Ⅰ剖面放大图。
图4(A)是图1(A)的Ⅱ-Ⅱ剖面局部放大图,(B)是图1(B)的Ⅱ-Ⅱ剖面局部放大图。
图5(A)是表示现有的减振片的粘弹性体向周边溢出的样子的示意图,(B)是表示本发明的减振片的粘弹性体向周边溢出的样子的示意图。
图6(A)是表示现有的覆盖减振片的周围的样子的示意图,(B)是表示本发明的覆盖减振片的周围的样子的示意图。
图7是表示本发明的一实施方式的悬架的制造工序的一部分的图。
图8(A)是以连接状态形成了多个负载杆坯料的图,(B)是在连接状态的多个负载杆坯料上粘贴减振片的图。
图9是表示现有的悬架的制造工序的一部分的图。
图10是说明悬架的构造的图。
图11是表示减振片的构造的图。
图12是说明减振片的减振效果的图。
具体实施方式
以下,基于附图说明本发明的一实施方式。
图1(A)是现有的粘贴了减振片的负载杆的示意主视图,(B)是本发明的粘贴了减振片的负载杆的示意主视图。图2是本发明的负载杆的凹坑部的局部剖面示意图。图3(A)是图1(A)的Ⅰ-Ⅰ剖面放大图,(B)是图1(B)的Ⅰ-Ⅰ剖面放大图。图4(A)是图1(A)的Ⅱ-Ⅱ剖面局部放大图,(B)是图1(B)的Ⅱ-Ⅱ剖面局部放大图。
一直以来,负载杆L的宽度方向两侧呈凸缘状立起,中央部为平面,并在接近台的根部稍微弯曲。减振片D被粘贴在负载杆L上,从中央部的平面凸出。相对于此,本发明的负载杆L,在减振片D的粘贴部形成有稍大于减振片D的凹坑部,减振片D被收容在该凹坑部内而不会较大地凸出。这样在粘贴了减振片D的状态下进行负载杆L的弯曲加工时,避免减振片D与弯曲工具的干涉,因此能够在将减振片D粘贴到负载杆L上后进行负载杆L的弯曲加工。此时,如果将该凹坑部作为粘贴减振片D时的引导件来使用,则减振片D相对负载杆L的定位容易。
另外,在将减振片D推压粘贴到负载杆L上时,粘弹性体会由于推压力而向周边溢出,特别是在该推压力大的情况下,会如图5(A)所示那样地溢出较多,但是根据本发明的负载杆L,即使粘弹性体由于较大的推压力向周边溢出,也会如图5(B)所示那样地收纳在减振片D周围的沟中。此外,在粘贴了减振片D之后,通过如图6(B)所示那样地将树脂等填充到减振片D周围的沟中,能够以少量的涂覆材料覆盖减振片D周围部分。
该凹坑部可以与负载杆L坯料的蚀刻形成一起,通过局部蚀刻形成。此外,也可以通过冲压加工等形成。此外,也可以在薄板上通过冲裁加工等形成大于减振片D的贯通孔,并与另一薄板重叠而形成具有凹坑部的负载杆L。
凹坑部只要具备避免粘贴后的减振片D与弯曲工具的干涉程度的深度即可,但是优选具有大于等于减振片D厚度的深度。此外,凹坑部可以形成在负载杆的柔性件侧,也可以如本实施方式那样地形成在其相反侧。
在使用这种负载杆L制造悬架时,如图7所示那样,首先将减振片D粘贴到负载杆L的凹坑部,然后利用模具等弯曲工具进行负载杆L的凸缘弯曲和荷重弯曲。此时,在弯曲加工前的处于平坦状态的负载杆L上粘贴减振片D,因此没有了立起来的凸缘等的妨碍,因此与现有的相比能够容易地实现粘贴的自动化。
此外,在通过蚀刻等形成负载杆坯料时,如果如图8(A)所示那样地对多个负载杆坯料以连接起来的状态(连接状态)形成,如图8(B)所示那样在该连接状态下在负载杆L上粘贴减振片D,则在更高速、更高精度、更低变形的状态下的粘贴自动化成为可能,可以进一步提高操作性。
另外,本发明不限定于上述的实施方式,在不脱离本发明的精神的范围内可以做成其他各种构成。
本发明可以适用于例如盘片装置的悬架。

Claims (8)

1.一种负载杆,其构成支承磁头的悬架,由薄板弹簧构成,其特征在于,形成有用于收容减振片的凹坑部。
2.根据权利要求1所述的负载杆,其特征在于,上述凹坑部通过局部蚀刻形成。
3.根据权利要求1所述的负载杆,其特征在于,上述凹坑部通过模具加工形成。
4.根据权利要求1所述的负载杆,其特征在于,上述凹坑部通过将2个薄板重合而形成,在其中1个薄板上形成有比减振片大的贯通孔。
5.根据权利要求1~4中任一项所述的负载杆,其特征在于,上述凹坑部的深度大于等于粘贴后的减振片的厚度。
6.一种悬架,其支承磁头,其特征在于,具备权利要求1~5中任一项所述的负载杆,并且在上述凹坑部中粘贴有减振片。
7.一种权利要求6所述的悬架的制造方法,其特征在于,在负载杆的上述凹坑部中粘贴了减振片后,对负载杆进行弯曲加工。
8.一种权利要求6所述的悬架的制造方法,其特征在于,由薄板弹簧材料以连接状态形成多个上述负载杆,在各负载杆的上述凹坑部中粘贴了减振片后,对负载杆进行弯曲加工,并将负载杆个别地切割分离。
CN200910006550.3A 2009-02-17 2009-02-17 负载杆、具备该负载杆的悬架以及悬架的制造方法 Active CN101807407B (zh)

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CN200910006550.3A CN101807407B (zh) 2009-02-17 2009-02-17 负载杆、具备该负载杆的悬架以及悬架的制造方法
JP2010025668A JP5604128B2 (ja) 2009-02-17 2010-02-08 サスペンション及びサスペンションの製造方法
US12/704,712 US8161626B2 (en) 2009-02-17 2010-02-12 Method for manufacturing a suspension
US13/423,864 US8913346B2 (en) 2009-02-17 2012-03-19 Suspension for a disk drive including a load beam having a recess containing a damper, and method for manufacturing suspension

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US8913346B2 (en) 2014-12-16

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