CN1316476C - 浮动块加载机构 - Google Patents

浮动块加载机构 Download PDF

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CN1316476C
CN1316476C CNB2003801057524A CN200380105752A CN1316476C CN 1316476 C CN1316476 C CN 1316476C CN B2003801057524 A CNB2003801057524 A CN B2003801057524A CN 200380105752 A CN200380105752 A CN 200380105752A CN 1316476 C CN1316476 C CN 1316476C
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于尔根·莫斯纳
斯蒂芬·纳普曼
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    • G11B7/1387—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector using the near-field effect
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    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10552—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base
    • G11B11/10554—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base the transducers being disposed on the same side of the carrier
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    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
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    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
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    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
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Abstract

本发明涉及一种用于带有可互换光存储媒体(8)的光学驱动器的柔性浮动块加载机构。一种光学驱动器的浮动块加载机构，该机构具有一个浮动块(2)，该浮动块固定于一个弹性臂(6)上并可以下降到光学存储媒体(8)的表面上和/或从光学存储媒体(8)的表面上升起，其中，具有一个不与所述弹性臂(6)相连接的加载元件(1)，该加载元件作用于弹性臂(6)上从而使浮动块(2)上升和/或下降。

Description

浮动块加载机构
技术领域
本发明涉及一种用于带可互换光存储媒体的光学驱动器的柔性浮动块加载机构。
背景技术
在硬盘技术中，使用了读写头，即下面所说的浮动块，其形状如同导弹并浮在硬盘存储盘上面的薄气垫上。这里的气垫是由硬盘快速旋转产生的。
浮动块固定在弹性臂的端部，借助于此臂，浮动块可移动到硬盘不同的读写位置。如果硬盘转速下降或进入停滞状态，气垫会遭到破坏，在硬盘起动时，必须首先把气垫建立起来。为解决这些问题，采取了一种特殊起/停措施，有了这种措施，此浮动块方能用于存储盘上(加载)和/或从存储盘移开，以免对存储盘和浮动块造成损坏。现在已知的浮动块起/停措施基本上有两种方式：
1)存储盘上专门设置一个磁头起落区：在存储盘的特定的粗糙区上设有一个停放处。存储盘上的数据区表面很光滑。如果浮动块停放在那里，在硬盘起动的瞬间，由于粘着力的作用，会从弹性臂上被扯掉。
2)倾坡加载机构：一个合适的机械装置将浮动块从存储盘表面经过一个斜坡移入存储盘外缘之外的停放处。由于加载只能在存储盘的外缘进行，所以，如果存储盘外缘的垂直摆动过大，这种方法会有问题。
上述两种方法均不适用于试验系统及带可互换存储盘(如光存储装置)的其它系统，因为加载不能在存储盘的所有部位进行，此外，在案例1中，并没有离开存储盘的分离装置。目前已经采用的用于试验系统的几种方案示于图1中。
示于图1中的这些方案均有其缺陷：浮动块都是以不确定的或非平行的方式被导引于存储盘上的，并且弹性臂的悬架必须移动。这就大大影响了弹性臂位置的可重复性。
刊载于2002年第41卷日本应用物理杂志、作者为金(Kim)等人、题为“近场记录用光浮动磁头的有效设计和性能”的文章之1884-1888页中公开了，试图将从硬盘技术中已知的浮动在气垫上的浮动块的位移，传送到具有可互换光存储媒体的光学驱动器上。这个浮动块可以带有诸如磁线圈和/或具有高级数字快门的物镜或其中一部分(如所谓的固态浸没透镜，SIL)，这样，它就可以自光存储媒体沿光轴线移动一个很小的操作距离。浮动块安装在一个光读写装置上，它可以和光存储媒体做相对位移。如果使用可互换光存储媒体，就必然要有起落区，本文件所述结构则采用由弹性臂、微型光学装置集成于弹性臂连接的枢臂上。斜坡加载机构的实现是基于已知硬盘技术中的一种机构。故加载只能在存储器外缘进行。在使用与硬盘相比便宜得多的塑料制成的存储媒体时，经常在外缘出现偏离理想盘面的现象(垂直摆动或轴向偏移)，这些均使在外缘加载变得更困难，甚至于不可能。这就要求有一种能够在存储区内缘上或任何其它要求的位置进行操作，并能将浮动块与存储盘分离的特殊加载机构。
发明内容
本发明的目的是对现有技术方案加以改进。
本发明用于光学驱动器的浮动块加载机构就可以实现了这一目的，该机构包括一个固定于弹性臂上的浮动块和一个不与弹性臂相连的加载元件，该浮动块可下降到光存储媒体表面上和/或从光存储媒体表面上升起；所述加载元件作用于该弹性臂上，使浮动块下降和/或升起。在下降完成后的状态，该弹性臂不接触加载元件，由此不会影响该浮动块在存储媒体表面上的浮动。在升起后的状态，在加载元件的作用下，弹性臂略微偏离存储媒体表面产生轻微的倾斜。在这种方式中，弹性臂固定点是固定不动的，从而使弹性臂，当然也还有浮动块，总是以同样的方式相对于下降完成状态的光轴处于同一方向。另外还可以为调整弹性臂预应力以及作用于浮动块上的弹力，提供一个垂直调整装置。由于是两个稳定状态之间的转换，也就是浮动块下降或升起，所以，不存在不确定的中间位置。
所述加载元件伸到光存储媒体表面和弹性臂之间。这就使加载元件易于作用到弹性臂上，而无需为力的传递而耗资另设机构。
加载元件最好由一个杠杆驱动。实际是一个间接杠杆机构，将浮动块从存储媒体表面仅提起零点几毫米。这样浮动块可下降到存储媒体的表面，和/或从该表面上升起，并尽可能与该表面平行。
按照本发明，杠杆是由一齿轮机构驱动的。这样，可使杠杆获得精确的、可重复性的驱动。齿轮机构最好设有一个加载销，其上面设有一个齿轮，该加载销用螺纹旋入读写装置中，依靠齿轮的转动，使加载销旋入读写装置或从读写装置旋出。而加载销的运动驱动了杠杆。
所述齿轮机构最好设有一个齿条。由于该齿条固定于可位移的读写装置之外的光学驱动器上，所以无需为加载功能配以附加电机驱动装置。然后，例如，通过读写装置的粗跟踪功能件进行加载操作，使齿条与以螺纹旋入读写装置内的加载销之间产生相对运动。通过可变粗跟踪进量，可以对加载速度进行调整。当然，亦可为加载操作另设一个驱动电机。
将齿条设置为可移动的方式，具有另一个优点。这样，加载操作实际上可以在存储媒体的任何要求的位置进行。将齿条移动到所要求的位置是能满足上述要求的。不过，还是可以移动到存储媒体之外的稳定停放位置，以便更换该存储媒体。
更为有利的是，为齿条提供一个直线驱动装置，这样，甚至使加载操作可以在读写装置静止时进行。这也可以使浮动块下降到存储装置的最外区域，否则很难做到这点。同时，它还能够跳过存储媒体的缺陷区及使用不同直径的存储媒体。在发生故障时，浮动块可以自存储器任何要求的位置上升起；待命(standby)操作也能够在任何位置进行。如果浮动块直接下放到了已写盘区，也不会对存储媒体的未写区域产生不利影响。
按本发明的另一种方式，杠杆是由凸轮控制装置操控的。因此能够以简单的方式实现杠杆的精确、可重复性的动作。凸轮控制方式中的凸轮固定在光读写装置上，而杠杆则设在光存储媒体的读写区之外。这就使浮动块只能在存储媒体的外缘下降和/或升起。然而，反向安排也是可以的，即将凸轮设在光存储媒体读写区之外，而把杠杆固定在光读写装置上。两种安排均能容易地与现有的光读写装置设计结合起来。
本发明的浮动块加载机构最适用于从光记录媒体读取和/或向光记录媒体写入的装置。使用这种装置就能够实现记录机构利用光近场效应或带物镜侧线圈的磁光记录技术。例如，在使用高数值孔径及薄基和/或复盖层时，这是必要的。因此，它能够在存储媒体上获得相对较高密度的数据。
附图说明
为加深理解，请参照下列图1-图4中关于本发明的解释。相同的标号代表相同的元件。
图1为按现有技术的带浮动块的存储媒体试验装置中的加载机构；
图2为本发明光学驱动器的一种加载机构；
图3为试验系统加载机构的另一种形式；和
图4为本发明加载机构的另一最佳实施例.
具体实施方式
图1为从现有技术已知的在存储媒体试验装置区域内实现加载机构的几种可能的方式：
a)倾斜加载杠杆：
加载机构的旋转点位于弹性臂(6)的末端。弹性臂悬架(9)是一种直接杠杆机构。加载操作只能在存储媒体(8)外围进行，这样才不会和存储媒体(8)发生碰撞。
b)加载杠杆：
加载机构的旋转点(11)位于弹性臂悬架(9)的末端。因此，加载操作可以在存储媒体(8)任何要求的位置进行，但这种结构不能对浮动块(2)进行调整使其平行于存储媒体(8)的表面。这意味着，在开始时，浮动块(2)以一个外刃接近于该表面。这就增加了在为浮动块(2)稳定运行而建立起气垫之前，浮动块(2)与存储媒体(8)相碰撞的危险性。
c)带有加载指状物的加载杠杆：
在加载操作过程中，浮动块(2)在带有加载指状物(12)的弹性臂(6)的支撑下，基本上保持水平的位置。这样，浮动块(2)以近乎平行的方式被控制于存储媒体(8)表面的上方。
图2为本发明光学驱动装置的加载机构。在操作期间，随着存储媒体(8)旋转，浮动块(2)漂浮于存储媒体表面上方约20毫微米至1.5微米的气垫上，并由一个具有确定了的弹力特性的弹性臂(6)保持在一个垂直方向有一定弹性的状态，存储媒体(8)在本图中仅示出了一部分。为了前述的关于粘着力的原因，当存储媒体处于静止状态时，浮动块(2)不能放置于存储媒体(8)的表面上。当存储媒体(8)旋转时，需要有一种机械加载机构能将浮动块(2)很轻柔地放下。这样就可以保证在浮动块与存储媒体(8)的表面接触前建立起气垫。相应地，浮动块(2)也以同样的方式从旋转的存储媒体(8)上升起。
图2中所示的加载机构不需要附加的驱动装置，因为杠杆机构是由在标准的读写装置(4)中所具有的电机驱动粗跟踪功能件操纵的。一个加载触头(1)伸到存储媒体(8)和弹性臂(6)之间。该加载触头安装于加载杠杆(3)上，该加载杠杆以一个预定的倾斜运动将弹性臂(6)从而也将浮动块(2)升起或降下。加载触头(1)在对弹性臂(6)施力的位置约移动0.3毫米，其中0.1毫米是其开始接触到弹性臂(6)之前的空程。这导致浮动块(2)中心约有0.3毫米的位移。加载杠杆(3)是由加载销(7)驱动的，加载销设有一个齿轮并用螺纹旋入读写装置(4)中。加载销(7)在读写装置(4)的螺纹中的旋转，能使其根据旋转方向在垂直方向做向上或向下运动。加载销(7)的旋转是借助齿条(5)实现的，齿条固定在框架上，它是可以移动的，齿条的齿数与系统的杠杆机构及加载销(7)的螺距相配合。根据运动的方向，使用跟踪马达，借助齿条(5)在预定位置的啮合作用下，使加载销(7)上升或下降。选择合适的螺纹方向和齿条(5)位移止动件能保证浮动块(2)总能在存储媒体(8)的读写范围内上升或下降。如果浮动块(2)在加载机构的作用下，放置于存储媒体(8)除其外缘的任何要求的位置上，而漏掉的存储媒体(8)外缘部分仍然要被读或写，则应将齿条(5)推到相应于存储媒体(8)外缘的终点挡块上。否则，加载机构会将浮动块(2)在其放下的地方再次升起。读写装置(4)朝存储媒体(8)中心点方向的运动会使浮动块(2)下降到存储媒体(8)的表面上。读写装置(4)朝存储媒体(8)外缘方向的运动会使浮动块(2)从存储媒体(8)的表面升起。作为另一种方式，可以借助一个为齿条(5)而设置的直线驱动装置调整所要求的加载位置。在这种情况，也可以在读写装置(4)处于静止状态时，借助齿条(5)的移动同时实现加载操作。
图3为本发明加载机构的另一种形式，例如，它可以用于试验系统。使用可移动的终点挡块(13)可以将齿条(5)推出存储媒体(8)的范围，这样浮动块(2)也可以移到存储媒体(8)的最外缘，以便从存储媒体(8)读取或写入数据，或进行其它的试验。
本发明加载机构的另一种实施例示于图4中。在这里，加载操作是由凸轮控制装置在存储媒体(8)外缘上的实现的。在这种情况，加载杠杆(3)固定于驱动装置的框架上。下降和升起浮动块(2)的加载操作总是在光学存储媒体(8)的外区进行的。安装在读写装置(4)上的凸轮(10)在加载操作期间通过加载触头(1)控制弹性臂(6)的偏移。读写装置(4)向存储媒体(8)中心点方向的运动使浮动块(2)下降到存储媒体的表面上。读写装置(4)向存储媒体(8)外围方向的运动使浮动块(2)从存储媒体(8)的表面升起。

Claims (8)

1.一种光学驱动器的浮动块加载机构，该机构具有一个固定于一个弹性臂(6)上的浮动块(2)和一个与弹性臂(6)分开的加载元件(1)，该浮动块可以下降到光学存储媒体(8)的表面上和/或从光学存储媒体(8)的表面上升起，该加载元件(1)伸到光学存储媒体(8)和所述弹性臂(6)之间并由一个杠杆(3)驱动使弹性臂(6)动作，从而使所述浮动块(2)下降和/或升起，其特征在于，该杠杆(3)由一个齿轮机构(5，7)驱动，该齿轮机构具有一个设有齿轮的加载销(7)和一个齿条(5)，该齿条设置为可移动的方式并与所述加载销(7)上的齿轮相啮合。
2.按权利要求1所述的浮动块加载机构，其特征在于，为所述齿条(5)设有一个直线驱动装置。
3.按权利要求2所述的浮动块加载机构，其特征在于，所述加载销(7)上的齿轮是借助所述直线驱动装置使齿条(5)相对于齿轮移动而动作的。
4.按权利要求1至3之一所述的浮动块加载机构，其特征在于，所述加载销(7)上的齿轮是利用一个粗跟踪功能件使所述齿条(5)相对于齿轮移动而动作的。
5.按权利要求1至3之一所述的浮动块加载机构，其特征在于，该机构还包括为所述齿条(5)设置的位移止动件，以保证所述浮动块(2)总是在所述存储媒体(8)的读写范围内下降和/或升起。
6.按权利要求1至3之一所述的浮动块加载机构，其特征在于，在下降完成后的状态，所述弹性臂(6)不和所述加载元件(1)接触。
7.按权利要求1至3之一所述的浮动块加载机构，其特征在于，该机构还包括一个用于调整所述弹性臂(6)预应力的调整装置。
8.一种从光记录媒体读取和/或向光记录媒体写入的装置，其特征在于，该装置具有一个按权利要求1至7之一所述的浮动块加载机构。
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