JPH0424781B2 - - Google Patents
Info
- Publication number
- JPH0424781B2 JPH0424781B2 JP57076705A JP7670582A JPH0424781B2 JP H0424781 B2 JPH0424781 B2 JP H0424781B2 JP 57076705 A JP57076705 A JP 57076705A JP 7670582 A JP7670582 A JP 7670582A JP H0424781 B2 JPH0424781 B2 JP H0424781B2
- Authority
- JP
- Japan
- Prior art keywords
- feed screw
- head
- magnetic sheet
- magnetic
- track
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000008602 contraction Effects 0.000 claims description 7
- 230000007423 decrease Effects 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition 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
- G11B5/54—Disposition 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 with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
Landscapes
- Moving Of Heads (AREA)
Description
【発明の詳細な説明】
本発明は、磁気ヘツドにより磁気シートに記録
再生する磁気記録再生機に係り、特に温度変化に
対して好適なヘツド送り装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording and reproducing machine for recording and reproducing information on a magnetic sheet using a magnetic head, and particularly to a head feeding device suitable for temperature changes.
従来、磁気ヘツドにより円板状の磁気シートに
記録再生する磁気記録再生機のヘツド送り装置と
して、モータを一定量だけ回転し、この回転運動
を送りねじによつて直線運動に変換し、磁気ヘツ
ドを磁気シートの半径方向に一定間隔で送る方法
が知られている。 Conventionally, as a head feeding device for a magnetic recording/reproducing machine that uses a magnetic head to record and reproduce information on a disc-shaped magnetic sheet, a motor is rotated by a certain amount, and this rotational motion is converted into linear motion by a feed screw, and the magnetic head is A known method is to send the magnetic sheet at regular intervals in the radial direction of the magnetic sheet.
磁気シートは、ベース材として一般に熱膨張係
数の大きいポリエステルフイルムが多く使われて
いるため、周囲温度によつて、磁気シートの中心
を基準にして半径方向に伸縮する。そのため磁気
ヘツドを、前記ヘツド送り装置によつて、磁気シ
ートの半径方向に一定間隔で送つて記録していつ
ても、磁気シート上には一定のトラツク間隔で記
録されず、各々のトラツク間隔は、周囲温度が上
昇すると広がり、低下すると狭められる。 Since a polyester film with a large coefficient of thermal expansion is generally used as a base material of a magnetic sheet, it expands and contracts in the radial direction based on the center of the magnetic sheet depending on the ambient temperature. Therefore, even if the magnetic head is sent at regular intervals in the radial direction of the magnetic sheet to record, the recording is not performed on the magnetic sheet at regular track intervals, and each track interval is It widens when the ambient temperature rises and narrows when it falls.
このようにして記録されたトラツクを、記録時
と同様に、前記ヘツド送り装置によつて、磁気ヘ
ツドを一定間隔で送つて再生すると、記録された
トラツクとずれて再生する場合があり有効な再生
トラツク幅が減少し、再生信号のＳ／Ｎが劣化す
る。また記録トラツク間隔の狭い場所では、隣接
する相互のトラツク間でのグストークが増加し、
相互の再生信号の性能を劣化させるという欠点が
ある。 When a track recorded in this manner is reproduced by sending the magnetic head at regular intervals using the head feeding device in the same way as during recording, the playback may be out of alignment with the recorded track, making effective playback impossible. The track width decreases and the S/N of the reproduced signal deteriorates. In addition, in places where the recording track interval is narrow, the gastalk between adjacent tracks increases,
This has the disadvantage of deteriorating the performance of mutually reproduced signals.
本発明の目的は、上記した従来技術の欠点を除
き、再生信号のＳ／Ｎを劣化させず、また、トラ
ツク間のクロストークが増加することなく記録・
再生することができる磁気記録再生機のヘツド送
り装置を簡単で小型化に適した構成で提供するこ
とにある。 An object of the present invention is to eliminate the drawbacks of the prior art described above, to record and record data without deteriorating the S/N ratio of the reproduced signal, and without increasing crosstalk between tracks.
It is an object of the present invention to provide a head feeding device for a magnetic recording/reproducing machine capable of reproducing data with a simple structure suitable for miniaturization.
この目的を達成するために、本発明では前記送
りねじは前記磁気シートと同じ膨張係数を有し、
一端を中心軸方向には移動できないように固定端
とし、他端を中心軸方向及び逆方向に伸縮可能な
自由端とし、かつ回転可能として軸支され、駆動
ギヤを備えたヘツド送りモータは回転軸が送りね
じとは分離された状態で、送りねじの中心軸と平
行に配置され、前記駆動ギヤを介して固定端の側
から前記送りねじの従動ギヤを駆動することによ
り、前記磁気ヘツドの移動範囲で周囲温度によつ
て磁気シートの伸縮する方向及びその量と、周囲
温度によつて送りねじが伸縮する方向及びその量
とが等しくなるように形成される。 To achieve this objective, the present invention provides that the feed screw has the same expansion coefficient as the magnetic sheet,
One end is a fixed end that cannot be moved in the direction of the center axis, the other end is a free end that can be expanded and contracted in the direction of the center axis and in the opposite direction, and is rotatably supported on a shaft.The head feed motor equipped with a drive gear rotates. The shaft is separated from the feed screw and is arranged parallel to the center axis of the feed screw, and the driven gear of the feed screw is driven from the fixed end side via the drive gear, thereby driving the magnetic head. The magnetic sheet is formed so that the direction and amount in which the magnetic sheet expands and contracts depending on the ambient temperature in the moving range are equal to the direction and amount in which the feed screw expands and contracts in response to the ambient temperature.
以下、本発明の実施例を図面により説明する。
第１図は本発明の磁気記録再生機のヘツド送り装
置の一例を示す斜視図、第２図は同装置の平面図
である。同図において、１はヘツド送りモータ、
２は駆動ギヤ、３は従動ギヤ、４は送りねじ、４
ａはおねじ、４ｂはフランジ、５は軸受、６はば
ね、７はヘツドキヤリージ、８はガイド、９は磁
気ヘツド、１０は磁気シート、１０ａは記録トラ
ツク列、１１はモータシヤフトを示し、第１図お
よび第２図で同符号のものは同様のものを示す。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing an example of a head feeding device for a magnetic recording/reproducing machine according to the present invention, and FIG. 2 is a plan view of the same device. In the figure, 1 is a head feed motor;
2 is a driving gear, 3 is a driven gear, 4 is a feed screw, 4
1 is a male screw, 4b is a flange, 5 is a bearing, 6 is a spring, 7 is a head carriage, 8 is a guide, 9 is a magnetic head, 10 is a magnetic sheet, 10a is a recording track row, and 11 is a motor shaft. In FIG. 2, the same reference numerals indicate the same components.
次にこのヘツド送り装置の動作を説明する。 Next, the operation of this head feeding device will be explained.
まずヘツド送りモータ１を、磁気ヘツド９を磁
気シート１０の半径方向に１トラツク送るのに相
当する量だけ時計または反時計方向に回転させ、
駆動ギヤ２を駆動させる。この駆動ギヤ２は送り
ねじ４の右端に固定して取り付けられている従動
ギヤ３とかみあつており、また軸受５で送りねじ
４の両端を支持しているため、送りねじ４を回転
させることができる。この送りねじ４にはおねじ
４ａが切つてあり、またヘツドキヤリージ７には
前記おねじ４ａに対応するめねじが切つてあるた
め、送りねじ４が回転することによつて、ヘツド
キヤリージ７は矢印ＡまたはＢの方向へ移動する
ことができる。このヘツドキヤリージ７の片端は
ガイド８によつて、送りねじ４の回転と共にヘツ
ドキヤリージ７が回転しなように、また円滑に移
動するように支持されている。磁気ヘツド９は、
その移動方向が磁気シート１０の中心に向うよう
にヘツドキヤリージ７に取り付けられている。以
上の動作によつて、磁気ヘツド９を磁気シートの
半径方向（矢印ＡあるいはＢの方向）へ１トラツ
ク送ることができる。また、ヘツド送りモータ１
の回転量によつて、磁気ヘツド９を必要なトラツ
ク分だけ自由に移動することもできる。 First, the head feed motor 1 is rotated clockwise or counterclockwise by an amount equivalent to feeding the magnetic head 9 one track in the radial direction of the magnetic sheet 10.
Drive gear 2 is driven. This drive gear 2 meshes with a driven gear 3 fixedly attached to the right end of the feed screw 4, and since both ends of the feed screw 4 are supported by bearings 5, the feed screw 4 cannot be rotated. I can do it. This feed screw 4 has a male thread 4a cut therein, and the head carriage 7 has a female thread cut therein which corresponds to the male thread 4a, so when the feed screw 4 rotates, the head carriage 7 is threaded in the direction indicated by the arrow A or arrow B. can move in the direction of One end of the head carriage 7 is supported by a guide 8 so that the head carriage 7 does not rotate and moves smoothly as the feed screw 4 rotates. The magnetic head 9 is
It is attached to the head carriage 7 so that its moving direction is toward the center of the magnetic sheet 10. By the above operation, the magnetic head 9 can be fed one track in the radial direction of the magnetic sheet (in the direction of arrow A or B). Also, the head feed motor 1
Depending on the amount of rotation, the magnetic head 9 can be freely moved by the required track.
次に、磁気ヘツド９が、温度変化による磁気シ
ートの半径方向の伸縮に対応して移動できること
も説明する。 Next, it will be explained that the magnetic head 9 can move in response to the expansion and contraction of the magnetic sheet in the radial direction due to temperature changes.
第３図は、前記ヘツド送り装置の側面図であ
り、第１図、第２図と同符号のものは同様なもの
を示している。まず送りねじ４の材質は、磁気シ
ート１０の線膨張係数（18×10-6cm／cm／℃）と
同一の線膨張係数を持つ黄銅、ステンレス鋼など
が用いられる。 FIG. 3 is a side view of the head feeding device, and the same reference numerals as in FIGS. 1 and 2 indicate similar parts. First, the feed screw 4 is made of brass, stainless steel, or the like, which has the same linear expansion coefficient as the magnetic sheet 10 (18×10 -6 cm/cm/° C.).
また、右側の軸受５は、フランジ４ｂと接する
面が、磁気シートの中心に一致するように置かれ
る。送りねじ４の左側には、ばね６が、送りねじ
４の回転をさまたげないように入れられており、
送りねじ４を常に右側に押すように作用してい
る。 Further, the bearing 5 on the right side is placed so that the surface in contact with the flange 4b coincides with the center of the magnetic sheet. A spring 6 is placed on the left side of the feed screw 4 so as not to hinder the rotation of the feed screw 4.
It always acts to push the feed screw 4 to the right.
今、周囲温度が上昇すると、磁気シート１０は
中心Ｏを基準にして外周側に伸びる。送りねじ４
も同様に伸びるが、フランジ４ｂによつて、右方
向への伸びは抑えられ、磁気シート１０の中心Ｏ
に一致したフランジ４ｂと軸受５の接する面を基
準（以下、送りねじの基準位置Ｍとする）にし
て、磁気シート１０同方向に伸び、記録トラツク
半径Ｒの点では、磁気ヘツド９は、磁気シート１
０との伸びた分だけ左側に移動することができ
る。 Now, when the ambient temperature rises, the magnetic sheet 10 extends toward the outer periphery with the center O as a reference. Feed screw 4
similarly extends, but the flange 4b suppresses the extension to the right, and the center O of the magnetic sheet 10
The magnetic sheet 10 extends in the same direction with the contact surface of the flange 4b and the bearing 5 that coincides with each other as a reference (hereinafter referred to as the reference position M of the feed screw), and at the point of the recording track radius R, the magnetic head 9 sheet 1
It can be moved to the left by the amount of extension from 0.
次に、周囲温度が、低下すると、磁気シート１
０は、中心Ｏを基準にして内周側に縮む。送りね
じ４も同様に縮むが、送りねじ４はばね６によつ
て右側に押しつけられているため、磁気シート１
０の中心Ｏに一致した送りねじの基準位置Ｍを固
定点として、磁気シート１０と同方向に縮むこと
により、記録トラツク半径Ｒの点では磁気ヘツド
９は、磁気シートの縮んだ分だけ右側に移動する
ことができる。 Next, when the ambient temperature decreases, the magnetic sheet 1
0 shrinks toward the inner circumference based on the center O. The feed screw 4 also contracts in the same way, but since the feed screw 4 is pressed to the right by the spring 6, the magnetic sheet 1
By contracting in the same direction as the magnetic sheet 10 with the reference position M of the feed screw coinciding with the center O of 0 as a fixed point, the magnetic head 9 moves to the right by the amount of contraction of the magnetic sheet at the recording track radius R. Can be moved.
第４図は、本発明の第２実施例として、送りね
じ４の基準位置Ｍを、磁気シート中心Ｏより左側
に置いたときの、本ヘツド送り装置の側面図を示
しており、前記した図と同符号のものは同様のも
のを示している。 FIG. 4 shows a side view of the present head feeding device as a second embodiment of the present invention when the reference position M of the feed screw 4 is placed to the left of the center O of the magnetic sheet. Items with the same symbol indicate similar items.
第５図は、本発明の第３実施例として、送りね
じ４の基準位置Ｍを、磁気シート中心Ｏより右側
に置いたときの本ヘツド送り装置の側面図であ
り、前記した図と同符号のものは同様のものを示
している。 FIG. 5 is a side view of the head feeding device according to the third embodiment of the present invention when the reference position M of the feed screw 4 is placed on the right side of the center O of the magnetic sheet, and it has the same reference numeral as the above figure. Similar items indicate similar items.
第４図および第５図において、記録トラツク半
径Ｒの点で、磁気ヘツド９が磁気シート１０の伸
縮に対応して、同一方向に同量だけ移動できるよ
うにするためには、送りねじ４の線膨張係数を選
定する必要がある。 4 and 5, in order to allow the magnetic head 9 to move by the same amount in the same direction in response to the expansion and contraction of the magnetic sheet 10 in terms of the recording track radius R, the feed screw 4 must be It is necessary to select the coefficient of linear expansion.
第６図は、前記した送りねじの基準位置Ｍと磁
気シート中心Ｏとの距離Ｌと、送りねじの最適な
線膨張係数との関係を示す図である。同図におい
て、横軸に、送りねじの基準位置Ｍと磁気シート
中心Ｏとの距離Ｌをとり、送りねじの基準位置Ｍ
が磁気シート中心Ｏより左側にある場合を−Ｌ、
右側にある場合を＋Ｌで表わしており、縦軸に送
りねじの最適な線膨張係数をとつている。この最
適な線膨張係数とは、磁気シート１０の最外周の
記録トラツクにおいて、磁気シート１０の伸縮に
対応して、磁気ヘツド９が同一方向に同量だけ移
動できるように選定したものである。 FIG. 6 is a diagram showing the relationship between the distance L between the reference position M of the feed screw described above and the center O of the magnetic sheet, and the optimum coefficient of linear expansion of the feed screw. In the figure, the distance L between the reference position M of the feed screw and the center O of the magnetic sheet is plotted on the horizontal axis, and the reference position M of the feed screw is
is on the left side of the magnetic sheet center O, -L,
The case on the right side is represented by +L, and the optimal coefficient of linear expansion of the feed screw is plotted on the vertical axis. This optimum linear expansion coefficient is selected so that the magnetic head 9 can move by the same amount in the same direction in response to the expansion and contraction of the magnetic sheet 10 on the outermost recording track of the magnetic sheet 10.
以上説明したように、磁気シート中心Ｏと、送
りねじ４の基準位置Ｍが同一点にない場合でも、
送りねじ線膨張係数を第６図のようにＬに応じて
選定することにより、磁気シート１０の伸縮に対
応して、磁気ヘツド９を同一方向に同量だけ移動
させることができる。 As explained above, even if the magnetic sheet center O and the reference position M of the feed screw 4 are not at the same point,
By selecting the linear expansion coefficient of the feed screw according to L as shown in FIG. 6, it is possible to move the magnetic head 9 by the same amount in the same direction in response to the expansion and contraction of the magnetic sheet 10.
次に前記ヘツド送り装置を用いて、磁気ヘツド
９で、磁気シート１０に記録再生したときの動作
を第７図を用いて説明する。 Next, the operation of recording and reproducing data on the magnetic sheet 10 with the magnetic head 9 using the head feeding device will be described with reference to FIG.
第７図は、上記したヘツド送り装置で磁気ヘツ
ド９を１トラツクづつ送つて磁気シート１０に記
録するごとに周囲温度が変化した場合の、記録ト
ラツクモデルの一部分を示すものであり、x1、
x2、x3は磁気ヘツド９を、順に磁気シート１０を
半径方向に沿つて内周側に送つていつたときの位
置を示し、x1′、x2′、x3′は、前記したヘツド位置
で磁気シート１０に記録したトラツク名を示す。
また、T0、T1、T2は周囲温度であり、T0は通常
動作温度、T1はT0より高い温度、T2はT0より低
い温度であり、T1とT0およびT2とT0との差は同
じものとする。 FIG. 7 shows a portion of a recording track model when the ambient temperature changes each time the magnetic head 9 is fed one track at a time to record on the magnetic sheet 10 using the above-mentioned head feeding device.
x 2 and x 3 indicate the positions of the magnetic head 9 when the magnetic sheet 10 is sequentially fed toward the inner circumferential side along the radial direction, and x 1 ′, x 2 ′, and x 3 ′ are the positions described above. The track name recorded on the magnetic sheet 10 is shown at the head position.
Also, T 0 , T 1 , T 2 are the ambient temperatures, T 0 is the normal operating temperature, T 1 is higher than T 0 , T 2 is lower than T 0 , T 1 and T 0 and T The difference between 2 and T 0 is assumed to be the same.
まず周囲温度T0のとき、ヘツド位置x1で第１
のトラツクx1′を記録する。次に、ヘツドを１ト
ラツク送り第２のトラツクを記録する時点で周囲
温度が温度T0から温度T1に上昇したとする。こ
の温度上昇によつて磁気シート１０は外周方向に
伸び、前記トラツクx1′は左側に移行するが、こ
の磁気シート１０と同様に、送りねじ４も伸びる
ため、ヘツド位置は従来の点線で示す位置より左
側になり、前記トラツクx1′と記録したトラツク
x2′は、正規のトラツクビツチＰに保たれる。 First, when the ambient temperature is T 0 , the first
Record the track x 1 ′. Next, suppose that the ambient temperature rises from temperature T 0 to temperature T 1 at the time when the head is advanced one track and records the second track. Due to this temperature rise, the magnetic sheet 10 expands in the outer circumferential direction, and the track x1 ' moves to the left. However, like the magnetic sheet 10, the feed screw 4 also expands, so the head position is as shown by the conventional dotted line. The track that is to the left of the position and recorded as the track x 1 '
x 2 ' is kept at the regular track bit P.
次に、さらにヘツドを１トラツク送り、第３の
トラツクを記録する時点で、周囲温度が温度T1
から温度T2に低下したとする。この温度低下に
よつて、磁気シート１０は内周方向に縮み、前記
トラツクx1′、x2′は右側に移行するが、この磁気
シート１０と同様に送りねじ４も縮むため、ヘツ
ド位置は従来の点線で示す位置より右側になり、
前記トラツクx2′と記録したトラツクx3′も、正規
のトラツクピツチＰに保たれる。 Next, the head is advanced one more track, and when the third track is recorded, the ambient temperature has reached the temperature T 1
Suppose that the temperature drops from T to 2 . Due to this temperature drop, the magnetic sheet 10 shrinks in the inner circumferential direction, and the tracks x 1 ′ and x 2 ′ shift to the right, but since the feed screw 4 also shrinks in the same way as the magnetic sheet 10, the head position changes. It is to the right of the position indicated by the conventional dotted line,
The track x 3 ' recorded as the track x 2 ' is also kept at the regular track pitch P.
次に周囲温度T0で上記した記録トラツクx1′、
x2′、x3′を再生する。磁気シート１０は周囲温度
がT2からT0に上昇することによつて、再び外周
方向に伸びるが、送りねじ４も同様に伸びるた
め、一定間隔で、磁気ヘツド９を送つて再生して
も、記録トラツク上を正確に再生することができ
る。 Next, at the ambient temperature T 0 , the above recording track x 1 ′,
Play x 2 ′, x 3 ′. The magnetic sheet 10 expands in the outer circumferential direction again as the ambient temperature rises from T 2 to T 0 , but the feed screw 4 also expands in the same way, so even if the magnetic head 9 is sent at regular intervals for regeneration. , it is possible to accurately reproduce recorded tracks.
以上説明したように、本発明によれば、周囲温
度の変化によつて磁気シートが半径方向に伸縮し
ても、磁気ヘツドがこの伸縮に対応して移動する
ことができるので、再生信号のＳ／Ｎの劣化、お
よびトラツク間相互のクロストークを発生させる
ことなく、記録、再生することができるヘツド送
り装置を提供することができる。 As explained above, according to the present invention, even if the magnetic sheet expands and contracts in the radial direction due to changes in ambient temperature, the magnetic head can move in response to this expansion and contraction, so that the reproduction signal S Accordingly, it is possible to provide a head feeding device capable of recording and reproducing data without causing deterioration of /N or mutual crosstalk between tracks.
第１図は本発明の一実施例を示す磁気記録再生
機のヘツド送り装置の斜視図、第２図は同装置の
平面図、第３図は同装置の側面図、第４図は第２
の実施例を示す同装置の側面図、第５図は第３の
実施例を示す同装置の側面図、第６図は送りねじ
基準位置と磁気シート中心との距離と送りねじの
線膨張係数の関係を示す線図、第７図は記録トラ
ツクの一部分を示すパターン図である。
１……ヘツド送りモータ、２……駆動ギヤ、３
……従動ギヤ、４……送りねじ、５……軸受、６
……ばね、７……ヘツドキヤリージ、８……ガイ
ド、９……磁気ヘツド、１０……磁気シート。
Fig. 1 is a perspective view of a head feeding device of a magnetic recording/reproducing machine showing one embodiment of the present invention, Fig. 2 is a plan view of the same device, Fig. 3 is a side view of the same device, and Fig. 4 is a second
Fig. 5 is a side view of the same device showing the third embodiment, Fig. 6 shows the distance between the feed screw reference position and the center of the magnetic sheet and the linear expansion coefficient of the feed screw. FIG. 7 is a pattern diagram showing a portion of a recording track. 1... Head feed motor, 2... Drive gear, 3
... Driven gear, 4 ... Feed screw, 5 ... Bearing, 6
...Spring, 7...Head carriage, 8...Guide, 9...Magnetic head, 10...Magnetic sheet.
Claims (1)
従動ギヤを備えた送りねじを用いて直線運動に変
換し、これによつて直線移動するヘツドキヤリツ
ジに取付けた磁気ヘツドで、円板状の磁気シート
の半径方向に一定間隔で記録・再生する磁気記録
再生機であつて、前記送りねじは前記磁気シート
と同じ膨張係数を有し、一端を中心軸方向には移
動できないように固定端とし、他端を中心軸方向
及び逆方向に伸縮可能な自由端とし、かつ回転可
能として軸支され、前記ヘツド送りモータは回転
軸が送りねじとは分離された状態で、送りねじの
中心軸と平行に配置され、前記駆動ギヤを介して
固定端の側から前記送りねじの従動ギヤを駆動す
ることにより、前記磁気ヘツドの移動範囲で周囲
温度によつて磁気シートの伸縮する方向及びその
量と、周囲温度によつて送りねじが伸縮する方向
及びその量とが等しくなる構成としたことを特徴
とする磁気記録再生機のヘツド送り装置。1. The rotation of a head feed motor equipped with a drive gear is converted into linear motion using a feed screw equipped with a driven gear, and thereby a magnetic head attached to a head carriage that moves linearly moves a disc-shaped magnetic sheet. A magnetic recording/reproducing machine that records and reproduces data at regular intervals in a radial direction, wherein the feed screw has the same expansion coefficient as the magnetic sheet, has one end fixed so that it cannot move in the direction of the central axis, and the other end. has a free end that can be expanded and contracted in the direction of the central axis and in the opposite direction, and is rotatably supported by a shaft, and the head feed motor is arranged parallel to the central axis of the feed screw, with the rotating shaft being separated from the feed screw. By driving the driven gear of the feed screw from the fixed end side via the drive gear, the direction and amount of expansion and contraction of the magnetic sheet depending on the ambient temperature within the movement range of the magnetic head, and the ambient temperature 1. A head feeding device for a magnetic recording/reproducing machine, characterized in that the direction in which the feed screw expands and contracts and the amount thereof are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7670582A JPS58196660A (en) | 1982-05-10 | 1982-05-10 | Head feed device of magnetic recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7670582A JPS58196660A (en) | 1982-05-10 | 1982-05-10 | Head feed device of magnetic recording and reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58196660A JPS58196660A (en) | 1983-11-16 |
| JPH0424781B2 true JPH0424781B2 (en) | 1992-04-28 |
Family
ID=13612928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7670582A Granted JPS58196660A (en) | 1982-05-10 | 1982-05-10 | Head feed device of magnetic recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58196660A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5211912A (en) * | 1975-07-18 | 1977-01-29 | Hitachi Ltd | Magnetic head position settlement apparatus |
| JPS5633009U (en) * | 1979-08-22 | 1981-04-01 |
-
1982
- 1982-05-10 JP JP7670582A patent/JPS58196660A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5211912A (en) * | 1975-07-18 | 1977-01-29 | Hitachi Ltd | Magnetic head position settlement apparatus |
| JPS5633009U (en) * | 1979-08-22 | 1981-04-01 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58196660A (en) | 1983-11-16 |
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