JPH04126360U - Track position detection mechanism of magnetic disk device - Google Patents
Track position detection mechanism of magnetic disk deviceInfo
- Publication number
- JPH04126360U JPH04126360U JP2968091U JP2968091U JPH04126360U JP H04126360 U JPH04126360 U JP H04126360U JP 2968091 U JP2968091 U JP 2968091U JP 2968091 U JP2968091 U JP 2968091U JP H04126360 U JPH04126360 U JP H04126360U
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- Prior art keywords
- magnetic disk
- protrusion
- photointerrupter
- track position
- detection mechanism
- Prior art date
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- Granted
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 230000007246 mechanism Effects 0.000 title claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims description 14
- 230000000903 blocking effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Landscapes
- Moving Of Head For Track Selection And Changing (AREA)
Abstract
(57)【要約】
【目的】 本考案は磁気ディスク装置のトラック位置検
出機構に関し、簡易な構成で磁気ディスクのトラックの
検出位置の調整が容易にできる磁気ディスク装置のトラ
ック位置検出機構を実現することを目的とする。
【構成】 磁気ディスクのトラック位置検出用のフォト
インタラプタ２０の、発光素子が内蔵された第１の突出
部と、受光素子が内蔵された第２の突出部の夫々の対面
する壁面に設けられた開口部２２ａ，２２ｂの１部を露
出するスリット３２ａ，３２ｂが設けられた遮蔽板３０
ａ，３０ｂと、この遮蔽板を第１及び第２の突出部の夫
々の対面する壁面に押し付けて固定する構成で遮蔽板３
０ａ，３０ｂを接続する接続部材３０ｃとよりなる移動
遮蔽部材３０をフォトインタラプタに取り付けた構成で
ある。
(57) [Summary] [Purpose] The present invention relates to a track position detection mechanism for a magnetic disk device, and provides a track position detection mechanism for a magnetic disk device that has a simple configuration and can easily adjust the detection position of a track on a magnetic disk. The purpose is to [Structure] A photointerrupter 20 for detecting the track position of a magnetic disk is provided on the facing wall of a first protrusion containing a light emitting element and a second protrusion containing a light receiving element. A shielding plate 30 provided with slits 32a and 32b that expose part of the openings 22a and 22b.
a, 30b, and a shielding plate 3 having a configuration in which the shielding plate is pressed and fixed to the facing wall surfaces of the first and second protrusions, respectively.
In this configuration, a movable shielding member 30 consisting of a connecting member 30c connecting 0a and 30b is attached to a photointerrupter.
Description
【０００１】0001
本考案は磁気ディスク装置のトラック位置検出機構に係り、特に磁気ヘッドが 磁気ディスクの半径方向に移動する際の最外周トラック位置をより精度良く検出 しうるように構成したトラック位置検出機構に関する。 The present invention relates to a track position detection mechanism of a magnetic disk device, and particularly to a magnetic head. Detects the outermost track position more accurately when moving in the radial direction of a magnetic disk The present invention relates to a track position detection mechanism configured to enable the detection of track positions.
【０００２】0002
従来の磁気ディスク装置に適用されるているトラック位置検出機構としては、 例えば図１１に示すような構成のものがある。図１１中、キャリッジ１は磁気ヘ ッド２ａと、アッパヘッドアーム３の下面に設けられた磁気ヘッド２ｂとを有し 、モータ４に駆動されるリードスクリュウ５に螺合している。従って、キャリッ ジ１はリードスクリュウ５の回転量に応じて矢印Ｘ方向（磁気ディスクの半径方 向）に移動し、磁気ヘッド２ａ，２ｂを磁気ディスク（図示せず）の記録面（磁 気記録可能な最内周トラックと最外周トラックのとの間の範囲）に摺動させる。 なお、キャリッジ１の一方の側部にはリードスクリュウ５が螺合し、他方の側部 にはガイドシャフト６が貫通しており、キャリッジ１はガイドシャフト６に案内 されて移動する。 Track position detection mechanisms applied to conventional magnetic disk drives include: For example, there is a configuration as shown in FIG. In Figure 11, the carriage 1 is attached to a magnetic and a magnetic head 2b provided on the lower surface of the upper head arm 3. , is screwed into a lead screw 5 driven by a motor 4. Therefore, the carry The screw 1 rotates in the direction of the arrow X (radial direction of the magnetic disk) according to the amount of rotation of the lead screw 5. direction), and move the magnetic heads 2a, 2b to the recording surface (magnetic direction) of the magnetic disk (not shown). (the range between the innermost recordable track and the outermost recordable track). Note that a lead screw 5 is screwed onto one side of the carriage 1, and a lead screw 5 is screwed onto the other side. A guide shaft 6 passes through it, and the carriage 1 is guided by the guide shaft 6. Be moved.
【０００３】 その際、磁気ディスクの「最外周トラック（００トラック）」を基準点として 検出する必要があり、この「００トラック」はキャリッジ１のベース１ａより垂 立する被検出部の遮断板１ｂがフォトインタラプタ２０の検出間隙２０ｓ内に嵌 入し、光路を遮断することにより検出される。なお、フォトインタラプタ２０は 装置のベース（図示せず）に固定された基板８（図８中、１点鎖線で示す）の下 面に取付けられ、遮断板１ｂとの相対位置を充分に調整した後固定される。0003 At that time, use the "outermost track (00 track)" of the magnetic disk as a reference point. This “00 track” is located vertically below base 1a of carriage 1. The blocking plate 1b of the detected part that stands up is fitted into the detection gap 20s of the photointerrupter 20. is detected by blocking the optical path. Note that the photo interrupter 20 is Below the substrate 8 (indicated by a dashed line in FIG. 8) fixed to the base of the device (not shown) It is attached to the surface and fixed after sufficiently adjusting the relative position with the blocking plate 1b.
【０００４】0004
しかるに、上記の構成の場合、フォトインタラプタ２０の位置の調整のために 調整後の締め付け用ネジが必要となり、ネジの部品代と締め付けに要する工数が 余分に必要となる。尚、位置調整の必要が無ければ、フォトインタラプタを基板 に接着剤にて接着することにより、又は半田付けにより固定することができ、ネ ジは不要である。 However, in the case of the above configuration, in order to adjust the position of the photointerrupter 20, A tightening screw is required after adjustment, and the cost of the screw parts and the man-hours required for tightening are increased. extra is needed. In addition, if there is no need to adjust the position, place the photointerrupter on the board. It can be fixed by gluing it with adhesive or by soldering. ji is not necessary.
【０００５】 あるいは、図１２に示す構成の如く、フォトインタラプタ２０をあらかじめ基 板８に固定しておき、基板８を磁気ディスク装置のフレーム１１に固定するネジ １２を貫通する貫通孔８ａを長孔とし、基板８とフレーム１１に取り付けられた 他の機構との電気的接続を可とう性を有するケーブル１４をコネクタ１３に接続 する構成とすることにより、基板８のフレーム１１に対するＸ方向の相対位置を 調整できる構成とする方法もある。[0005] Alternatively, as in the configuration shown in FIG. Screws that are fixed to the board 8 and that fix the board 8 to the frame 11 of the magnetic disk device The through hole 8a passing through 12 is made into a long hole, and is attached to the substrate 8 and the frame 11. A flexible cable 14 is connected to the connector 13 for electrical connection with other mechanisms. By adopting a configuration in which the relative position of the board 8 with respect to the frame 11 in the X direction is There is also a way to create an adjustable configuration.
【０００６】 しかるに、この構成の場合は基板８をＸ方向へ移動可能とするためにフレーム １１内に余分な空間が必要となるとともに、ケーブル１４の収納空間も必要とな り従って装置の小型化を阻外し、更にケーブル１４が可とう性を有する特殊製品 であるため、コスト高となる。[0006] However, in this configuration, in order to make the board 8 movable in the X direction, the frame is In addition to requiring extra space within the cable 11, storage space for the cable 14 is also required. Therefore, it is a special product that prevents miniaturization of the device and also has a flexible cable 14. Therefore, the cost is high.
【０００７】 あるいは、図１１のキャリッジ１に設けられた遮断板１ｂをキャリッジ１に対 し移動可能な構成で取り付けることにより「００トラック」の検出位置を調整す る方式があるが、この構成は上記遮断板の調整のためにネジ，バネ等の部品が余 分に必要となり、この部品代，工数が余分に必要となるとともに、このためにキ ャリッジの重量が増し、キャリッジの移動用モータ４の負担が増すことによりキ ャリッジの円滑な動きが妨げられるおそれがある。[0007] Alternatively, the shielding plate 1b provided on the carriage 1 in FIG. By installing it in a movable configuration, you can adjust the detection position of the "00 track". However, this configuration requires extra parts such as screws and springs to adjust the above-mentioned shield plate. In addition to requiring additional parts and man-hours, this also requires The weight of the carriage increases, and the load on the motor 4 for moving the carriage increases. Smooth movement of the carriage may be hindered.
【０００８】 本考案は上述の問題点に鑑みてなされたものであり、簡易な構成でフォトイン タラプタによる「００トラック」検出位置の調整が容易な磁気ディスク装置のト ラック位置検出機構を実現することを目的とする。[0008] The present invention was developed in view of the above-mentioned problems, and it is a photo-input method with a simple configuration. A magnetic disk device drive with easy adjustment of the “00 track” detection position using a interrupter. The purpose is to realize a rack position detection mechanism.
【０００９】[0009]
磁気ヘッドを有し、磁気ディスクの半径方向に移動するキャリッジにトラック 位置検出用の遮断板を設け、発光素子が内蔵された第１の突出部と受光素子が内 蔵された第２の突出部とが対面するように配置され夫々の対面する壁面に設けら れた２つの開口部を通し光路を形成するフォトインタラプタの光路を遮断板が遮 断することにより磁気ヘッドが最外周トラック位置にあることを検出する磁気デ ィスク装置のトラック位置検出機構において、前記フォトインタラプタの前記第 １の突出部と前記第２の突出部の夫々に設けられた前記２つの開口部の夫々の１ 部を露出し、前記発光素子と前記受光素子との間に光路を形成するように設けら れたスリットを有する２枚の遮蔽板と、第１の突出部と第２の突出部の前記対面 する壁面の夫々に２枚の遮蔽板を押し付けるように２枚の遮蔽板を接続する接続 部材とよりなる移動遮蔽部材を、前記キャリッジ及び遮蔽板の移動方向に移動可 能にフォトインタラプタに取り付けた。 Tracks are placed on a carriage that has a magnetic head and moves in the radial direction of the magnetic disk. A shielding plate for position detection is provided, and the first protrusion in which the light emitting element is built in and the light receiving element are located inside. The second protruding portion is arranged so as to face the stored second protruding portion, and is provided on each facing wall surface. A blocking plate blocks the optical path of the photointerrupter, which forms an optical path through two openings. A magnetic device that detects that the magnetic head is at the outermost track position by In the track position detection mechanism of the disk device, the first 1 of the two openings provided in each of the first protrusion and the second protrusion. the light emitting element and the light receiving element so as to form an optical path between the light emitting element and the light receiving element. two shielding plates having slits, and the facing surfaces of the first protrusion and the second protrusion. A connection that connects two shielding plates so that they are pressed against each wall surface. A movable shielding member consisting of the member is movable in the moving direction of the carriage and the shielding plate. Attached to a photo interrupter.
【００１０】0010
光路形成用のスリットを有する移動遮蔽部材の遮蔽板が、フォトインタラプタ の第１の突出部と第２の突出部の夫々の対面する壁面に押し付けられることによ り生ずる摩擦力でフォトインタラプタに移動可能な状態で固定される。従ってネ ジ等の余分な部品が不要である。 The shielding plate of the movable shielding member having a slit for forming an optical path is a photointerrupter. by being pressed against the facing walls of the first protrusion and the second protrusion. It is movably fixed to the photo-interrupter by the frictional force generated. Therefore, No extra parts such as jis are required.
【００１１】[0011]
図１は本考案になる第１実施例の磁気ディスク装置のトラック位置検出機構の 移動遮蔽部材３０が取り付けられたフォトインタラプタ２０の斜視図を示す。 FIG. 1 shows a track position detection mechanism of a magnetic disk drive according to a first embodiment of the present invention. A perspective view of a photointerrupter 20 with a movable shielding member 30 attached thereto is shown.
【００１２】 尚、移動遮蔽部材３０を取り付けたフォトインタラプタ２０を除く磁気ディス ク装置のトラック位置検出機構の構成は図１１に示した従来のものと同一であり 、従来の技術の項にて説明したのでその説明を省略する。0012 Note that magnetic disks other than the photointerrupter 20 to which the movable shielding member 30 is attached The structure of the track position detection mechanism of the track device is the same as the conventional one shown in Fig. 11. , has been explained in the section of the prior art, so its explanation will be omitted.
【００１３】 図１は本考案になる移動遮蔽部材３０を装着したフォトインタラプタ２０の斜 視図を示す。[0013] FIG. 1 shows an oblique view of a photointerrupter 20 equipped with a movable shielding member 30 according to the present invention. A view is shown.
【００１４】 又、図２は図１のフォトインタラプタ２０の斜視図を示す。[0014] Further, FIG. 2 shows a perspective view of the photointerrupter 20 of FIG. 1.
【００１５】 両図中、フォトインタラプタ２０は従来のフォトインタラプタの対面する壁面 の夫々に開口部２２ａ，２２ｂを設けたものであり、図３で示した図１のIII − III 線に沿う断面図及び図４で示した図１のIV−IV線に沿う断面図で示す如く、 発光素子２１ａを内蔵する第１の突出部２０ａと受光素子２１ｂを内蔵する第２ の突出部２０ｂとが対面するように配置されており、２つの開口部２２ａ，２２ ｂを通し光路Ａを形成するものである。[0015] In both figures, the photo interrupter 20 is the wall surface facing the conventional photo interrupter. III-- in FIG. 1 shown in FIG. As shown in the cross-sectional view taken along line III and the cross-sectional view taken along line IV-IV in FIG. 1 shown in FIG. The first protrusion 20a has a built-in light emitting element 21a, and the second protrusion has a built-in light receiving element 21b. The two openings 22a, 22 are arranged so that the protrusion 20b faces each other. b to form an optical path A.
【００１６】 図１１の遮断板１ｂがフォトインタラプタ２０の検出間隙２０Ｓに嵌入したと きこの光路Ａをさえぎることにより、前述の磁気ディスクの「００トラック」の 位置が検出される。[0016] When the blocking plate 1b in FIG. 11 is inserted into the detection gap 20S of the photointerrupter 20, By blocking the optical path A of the mushroom, the “00 track” of the magnetic disk mentioned above can be The position is detected.
【００１７】 図７は移動遮蔽部材３０の斜視図を示す。[0017] FIG. 7 shows a perspective view of the movable shielding member 30. As shown in FIG.
【００１８】 同図中、移動遮蔽部材３０は例えば板金加工成形品であり、図７に示す如く弾 性を有する板金を折り曲げコの字形に成形したものであり、対面する遮蔽板３０ ａ，３０ｂとこれを接続する接続部材３０ｃとより構成される。[0018] In the same figure, the movable shielding member 30 is, for example, a sheet metal processed molded product, and as shown in FIG. The shielding plate 30 is made by bending and forming a sheet metal into a U-shape. a, 30b and a connecting member 30c that connects them.
【００１９】 図８は図７のVIIIの方向から見た正面図を示す。同図中、移動遮蔽部材３０は 対面する遮蔽板３０ａ，３０ｂの相互離隔距離が折り曲げ部３１ａ，３１ｂでは フォトインタラプタ２０の２つの突出部２０ａ，２０ｂの相互離隔距離ｄ1 と等 しく、折り曲げ部３１ａ，３１ｂからの距離が離れるに従い相互離隔距離が増す 構成である。即ち、図８においてｄ1 ＜ｄ2 とし、図１に示す如く、移動遮蔽部 材を構成する板金の弾性に抗し、遮蔽板３０ａ，３０ｂの相互離隔距離を縮めな がらフォトインタラプタ２０の検出間隙２０Ｓに押し込む。ここで移動遮蔽部材 ３０が遮蔽板の相互離隔距離を拡げようとする作用を有する板バネを構成してい るため、フォトインタラプタ２０の２つの突出部２０ａ及び２０ｂの対面する壁 面に押し付けられることにより、移動遮蔽部材３０がフォトインタラプタ２０の 検出間隙２０Ｓに固定される。FIG. 8 shows a front view seen from the direction VIII in FIG. In the figure, in the movable shielding member 30, the mutual separation distance between the facing shielding plates 30a and 30b is equal to the mutual separation distance d 1 between the two protrusions 20a and 20b of the photointerrupter 20 at the bent portions 31a and 31b, and , 31b, the mutual separation distance increases as the distance increases. That is, in FIG. 8, d 1 <d 2 and as shown in FIG. 1, the detection gap 20S of the photointerrupter 20 is reduced while resisting the elasticity of the sheet metal constituting the movable shielding member and shortening the distance between the shielding plates 30a and 30b. Push it into. Here, since the movable shielding member 30 constitutes a leaf spring that has the effect of increasing the distance between the shielding plates, the movable shielding member 30 is pressed against the facing wall surfaces of the two protrusions 20a and 20b of the photointerrupter 20. , the movable shielding member 30 is fixed in the detection gap 20S of the photointerrupter 20.
【００２０】 又、遮蔽板３０ａ，３０ｂの夫々の中程にはスリット３２ａ，３２ｂが設けら れており、図１，図３，図４に示す如くこのスリット３２ａ，３２ｂがフォトイ ンタラプタの開口部２２ａ，２２ｂの夫々を覆い１部を露出することにより、互 いの露出部分を介し光路Ａを形成する構成である。[0020] Further, slits 32a and 32b are provided in the middle of each of the shielding plates 30a and 30b. As shown in FIGS. 1, 3, and 4, these slits 32a and 32b are By covering each of the openings 22a and 22b of the interrupter and exposing one part, it is possible to In this configuration, an optical path A is formed through the exposed portion of the lens.
【００２１】 次に「００トラック」検出位置の調整方法について説明する。[0021] Next, a method of adjusting the "00 track" detection position will be explained.
【００２２】 「００トラック」検出位置の調整は、例えば前述の如く図１１においてフォト インタラプタ２０をＸ方向へ移動するのと同一の効果を得ることにより実現でき る。即ち、図１，図４において光路ＡをＸ方向へ移動すればよい。[0022] Adjustment of the “00 track” detection position can be done, for example, by using the photo This can be achieved by obtaining the same effect as moving the interrupter 20 in the X direction. Ru. That is, the optical path A may be moved in the X direction in FIGS. 1 and 4.
【００２３】 具体的にはフォトインタラプタ２０を基板８に固定した状態で図５又は図６に 示す如く、移動遮蔽部材をＸ方向のどちらかに移動すればよい。但し上記の移動 は、発光素子２１ａから発せられた光が遮蔽板３０ａ及び３０ｂのスリット３２ ａ及び３２ｂを介し、受光素子２１ｂに達する範囲内に限られる。即ち発光素子 と受光素子のＸ方向の有効幅の内側にスリット３２ａ，３２ｂが含まれる範囲内 で移動可能である。[0023] Specifically, the photointerrupter 20 is fixed to the substrate 8 as shown in FIG. 5 or 6. As shown, the movable shielding member may be moved in either direction in the X direction. However, the above movement The light emitted from the light emitting element 21a passes through the slits 32 of the shielding plates 30a and 30b. It is limited to the range that reaches the light receiving element 21b via the light receiving element 21b via the light receiving element 21b. That is, a light emitting element and within the range that includes the slits 32a and 32b inside the effective width of the light receiving element in the X direction. It is possible to move.
【００２４】 尚、前述の如く、フォトインタラプタ２０に対し移動遮蔽部材３０は、移動遮 蔽部材を構成する板金が有する弾性により、夫々の遮蔽板３０ａ，３０ｂがフォ トインタラプタの２つの突出部２０ａ，２０ｂの壁面に押し付けられることによ り生ずる摩擦力により固定されているので、摺動により移動することが可能であ る。 図９は本考案になる第２実施例の磁気ディスク装置のトラック位置検出機構の 移動遮蔽部材３０’が取り付けられたフォトインタラプタ２０’の斜視図を示し 、図１０は図９のフォトインタラプタ２０’のみの斜視図を示す。[0024] Note that, as described above, the movable shielding member 30 is a movable shielding member with respect to the photointerrupter 20. Due to the elasticity of the sheet metal constituting the shielding member, each of the shielding plates 30a and 30b is By being pressed against the walls of the two protrusions 20a and 20b of the interrupter, It is fixed by the frictional force generated by the movement, so it cannot be moved by sliding. Ru. FIG. 9 shows a track position detection mechanism of a magnetic disk device according to a second embodiment of the present invention. shows a perspective view of a photointerrupter 20' with a movable shielding member 30' attached; , FIG. 10 shows a perspective view of only the photointerrupter 20' of FIG.
【００２５】 図１０のフォトインタラプタ２０’は、発光素子を具備する第１の突出部２０ ’ａと受光素子を具備する第２の突出部２０’ｂの対面する壁面の上端部に、移 動遮蔽部材をＸ方向に移動するときの案内と、上方への外れ防止を目的とした、 案内用突出部２３ａ，２３ｂが内側に向かって設けられている。尚、他の構成に ついては第１実施例のフォトインタラプタ２０と同一であるので、その説明を省 略する。[0025] The photointerrupter 20' in FIG. 10 includes a first protrusion 20 that includes a light emitting element. ’a and the upper end of the wall surface facing the second protrusion 20 ’b, which is provided with a light receiving element, is moved. The purpose is to guide the moving shielding member when moving it in the X direction and to prevent it from coming off upward. Guide protrusions 23a and 23b are provided inward. In addition, for other configurations Since this is the same as the photointerrupter 20 of the first embodiment, the explanation thereof will be omitted. Omitted.
【００２６】 図９の移動遮蔽部材３０’は、高さｈをフォトインタラプタ２０’の第１及び 第２の突出部２０’ａ，２０’ｂの対面する壁面の案内用突出部２３ａ，２３ｂ 迄の高さと等しくすることによりはめ込みができる構成とされている。又、Ｘ方 向へ移動するときの、ドライバ，ペンチ等の工具による取り扱いの容易性を目的 として、Ｘ方向の長さをフォトインタラプタ２０’より長くするとともに、接続 部材３０’ｃの手前端部に、かぎ部３３と、貫通孔３４が設けられている。[0026] The movable shielding member 30' of FIG. Guiding protrusions 23a, 23b on the facing wall surfaces of the second protrusions 20'a, 20'b The configuration allows for fitting by making the height equal to the previous height. Also, X direction The purpose is to make it easier to handle with tools such as screwdrivers and pliers when moving in the direction As a result, the length in the X direction is made longer than the photo interrupter 20', and the connection A hook portion 33 and a through hole 34 are provided at the front end of the member 30'c.
【００２７】 尚、フォトインタラプタを除くこの第２実施例の磁気ディスク装置のトラック 位置検出機構の構成は、図１１に示した従来のものと同一であり、従来の技術の 項で説明したので、その説明を省略する。[0027] Incidentally, the tracks of the magnetic disk device of this second embodiment excluding the photointerrupter The configuration of the position detection mechanism is the same as the conventional one shown in FIG. Since it was explained in Section 1, its explanation will be omitted.
【００２８】[0028]
光路形成用のスリットを有する遮蔽板を有する移動遮蔽部材が、それ自体の弾 性により遮蔽板をフォトインタラプタの発光素子を内蔵する第１の突出部と受光 素子を内蔵する第２の突出部の対面する壁面へ押し付けることにより保持される ことにより、「００トラック」検出位置の調整の際は移動遮蔽部材を壁面に沿っ てスライドするといった簡単な操作で調整することができ、しかも調整後はそれ 自体の弾性により保持されるので、位置ずれを起こすこともなく、調整後の精度 を保持することができる。 A movable shielding member having a shielding plate having a slit for forming an optical path has its own elasticity. Depending on the nature, the shielding plate is connected to the first protrusion containing the light emitting element of the photointerrupter and the light receiving part. It is held by pressing the second protrusion containing the element against the facing wall surface. Therefore, when adjusting the “00 track” detection position, move the movable shielding member along the wall surface. Adjustments can be made with simple operations such as pressing and sliding, and after adjustment, the Because it is held by its own elasticity, it does not shift its position, and the accuracy after adjustment is maintained. can be retained.
【図１】本考案になる第１実施例の移動遮蔽部材とフォ
トインタラプタの斜視図である。FIG. 1 is a perspective view of a movable shielding member and a photointerrupter according to a first embodiment of the present invention.
【図２】本考案になる第１実施例のフォトインタラプタ
の斜視図である。FIG. 2 is a perspective view of a photointerrupter according to a first embodiment of the present invention.
【図３】図１のIII −III 線に沿った断面図である。FIG. 3 is a sectional view taken along line III-III in FIG. 1;
【図４】図１のIV−IV線に沿った断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG. 1;
【図５】図４の移動遮蔽部材を移動した断面図である。FIG. 5 is a cross-sectional view of the movable shielding member of FIG. 4 when it is moved.
【図６】図４の移動遮蔽部材を移動した断面図である。FIG. 6 is a cross-sectional view of the movable shielding member of FIG. 4 when it is moved.
【図７】本考案になる第１実施例の移動遮蔽部材の斜視
図である。FIG. 7 is a perspective view of the movable shielding member of the first embodiment of the present invention.
【図８】図７のVIIIの方向からみた正面図である。8 is a front view seen from the direction VIII in FIG. 7. FIG.
【図９】本考案の第２実施例のフォトインタラプタと移
動遮蔽部材の斜視図である。FIG. 9 is a perspective view of a photointerrupter and a movable shielding member according to a second embodiment of the present invention.
【図１０】本考案になる第２実施例のフォトインタラプ
タの斜視図である。FIG. 10 is a perspective view of a photointerrupter according to a second embodiment of the present invention.
【図１１】従来の第１例の斜視図である。FIG. 11 is a perspective view of a first conventional example.
【図１２】従来の第２例の斜視図である。FIG. 12 is a perspective view of a second conventional example.
１ キャリッジ １ａ ベース １ｂ 遮蔽板 ２０，２０’ フォトインタラプタ ２０ａ 第１の突出部 ２０ｂ 第２の突出部 ２０Ｓ 検出間隙 ２１ａ 発光素子 ２１ｂ 受光素子 ２２ａ，２２ｂ 開口部 ３０，３０’ 移動遮蔽部材 ３０ａ，３０ｂ 遮蔽板 ３０ｃ 接続部材 ３２ａ，３２ｂ スリット Ａ 光路 1 carriage 1a base 1b Shielding plate 20, 20’ Photo interrupter 20a first protrusion 20b second protrusion 20S detection gap 21a Light emitting element 21b Light receiving element 22a, 22b opening 30, 30' Moving shielding member 30a, 30b shielding plate 30c connection member 32a, 32b slit A optical path
Claims (1)
向に移動するキャリッジにトラック位置検出用の遮断板
を設け、発光素子が内蔵された第１の突出部と受光素子
が内蔵された第２の突出部とが対面するように配置され
夫々の対面する壁面に設けられた２つの開口部を通し光
路を形成するフォトインタラプタの該光路を該遮断板が
遮断することにより、該磁気ヘッドが最外周トラック位
置にあることを検出する磁気ディスク装置のトラック位
置検出機構において、前記フォトインタラプタの前記第
１の突出部と前記第２の突出部の夫々に設けられた前記
２つの開口部の夫々の１部を露出し、前記発光素子と前
記受光素子との間に光路を形成するように設けられたス
リットを有する２枚の遮蔽板と、該第１の突出部と該第
２の突出部の前記対面する壁面の夫々に該２枚の遮蔽板
を押し付けるように該２枚の遮蔽板を接続する接続部材
とよりなる移動遮蔽部材を、前記キャリッジ及び遮蔽板
の移動方向に移動可能に該フォトインタラプタに取り付
けてなる磁気ディスク装置のトラック位置検出機構。Claim 1: A carriage having a magnetic head and moving in the radial direction of a magnetic disk is provided with a blocking plate for detecting a track position, a first protrusion having a built-in light emitting element and a second protrusion having a built-in light receiving element. The shielding plate blocks the optical path of the photointerrupter, which is arranged so that the protruding parts of the photointerrupter face each other, and forms an optical path through two openings provided in the facing walls, so that the magnetic head is In a track position detection mechanism of a magnetic disk device that detects that the magnetic disk device is at an outer track position, each of the two openings provided in each of the first protrusion and the second protrusion of the photointerrupter. two shielding plates having a slit with one portion exposed and provided to form an optical path between the light emitting element and the light receiving element; and the first protrusion and the second protrusion. A movable shielding member comprising a connecting member connecting the two shielding plates so as to press the two shielding plates against each of the facing wall surfaces is movable in the moving direction of the carriage and the shielding plate. A magnetic disk drive track position detection mechanism attached to an interrupter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2968091U JP2508436Y2 (en) | 1991-04-26 | 1991-04-26 | Track position detection mechanism for magnetic disk unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2968091U JP2508436Y2 (en) | 1991-04-26 | 1991-04-26 | Track position detection mechanism for magnetic disk unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04126360U true JPH04126360U (en) | 1992-11-18 |
| JP2508436Y2 JP2508436Y2 (en) | 1996-08-21 |
Family
ID=31913499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2968091U Expired - Lifetime JP2508436Y2 (en) | 1991-04-26 | 1991-04-26 | Track position detection mechanism for magnetic disk unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2508436Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013171609A (en) * | 2012-02-22 | 2013-09-02 | Alpine Electronics Inc | Disk device including optical detection unit |
-
1991
- 1991-04-26 JP JP2968091U patent/JP2508436Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013171609A (en) * | 2012-02-22 | 2013-09-02 | Alpine Electronics Inc | Disk device including optical detection unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2508436Y2 (en) | 1996-08-21 |
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