TW417097B - Disk device - Google Patents

Abstract

A head carriage supports a head which performs recording/reproducing on a disk-shaped recording medium. A carriage moving mechanism moves the carriage in a radial direction of the disk-shaped recording medium. A head lifting/lowering mechanism causes the head to approach the disk-shaped recording medium. After recording/reproducing on the disk-shaped recording medium through the head is finished, the carriage moving mechanism moves the head to a position which is different from a position at which the head lifting/lowering mechanism caused the head to approach the disk-shaped recording medium at the last time.

Description

V. Description of the invention (1) Background of the present invention 1. Definition of the present invention A7 B7 Ministry of Economic Affairs-6-Sample cooperation of employees of the Central Bureau of Procurement and Printing The department of the present invention deals with-a disc device, in detail, its A film device is described in which a magnetic head can be approached-a disc-like recording medium and can perform its recording / reproducing action. ........ '—' · 2. Description of related technologies in an electronic device similar to a personal computer, word processor, etc. — — magnetic media device, for example, a setting can be used to Tools for recording information. In the magnetic disc device, when a disc cartridge serving as a recording medium container is loaded, the magnetic disc contained in the disc cartridge will rotate, and a magnetic head will slide to the magnetic disc. Above, to perform its magnetic recording / reproducing action β The magnetic disc device will have a recording medium moving mechanism, which includes a disc support and a slider, the former can be inserted into the disc cartridge And the latter can perform a sliding operation in response to the insertion of a disc cartridge, and the disc support can be moved from a rack insertion / exit position to a certain rack loading position β the slider It is subject to a force in one direction through a coil spring and the like. When the disc cartridge is inserted, a latch lever is pushed by one end of the disc cartridge to rotate, and the slider can be prevented from moving by the release of the latch lever. As a result, the slider can slide in the direction of the above-mentioned force, and the disc holder can be moved to the above-mentioned loading position of the conveyor. At this moment, the disc cartridge jCNSTI ^ (210X297 ^)-~~-(Please first Read the notes on the back of the page and then fill out this page} • Pack. Good, ml il ·! • • nn It can be clamped on a turntable. In order to exactly perform the loading operation performed by the disc support, the above-mentioned spring must be added to the force of its slider, and the setting must be strong * The cassette starts when the disc is inserted into the disc holder, and for a period of time until the disc cartridge is loaded, the slider will be accelerated by the spring force, and then the slider will slide at a substantially constant rate. β Therefore, the moment the slider reaches a sliding completion position, the magnetic head will make strong contact with the magnetic disc, so that the magnetic film on the surface of the magnetic disc may be damaged. In order to avoid this Problem, in the device of its related art, there is a device which can make the slider Speed damper. This damper uses an oil damper. The oil damper includes: a gear that is combined with a rack provided on the slider; a rotating body that can be connected with the gear Rotating together; and a container, which is filled with grease and contains the rotating body. In this oil damper, when the rotating body provided in the container is rotated due to the sliding of the slider, the The rotating body will be decelerated due to the viscous resistance of the grease set in its container, and the slider will be slowed down. However, in the magnetic disc device in its related art, it is loaded into the disc cartridge Before entering the magnetic disc device, the head's head conveyor of a building will always return to a predetermined position. For example, the head will face one of its outermost magnetic tracks' 0 (T pre-operation position). Therefore, when the disc cartridge is inserted into the disc support and the disc support is dropped to its loading position on the conveyor, the magnetic head is attached to the outermost magnetic track of the magnetic disc, above the above position. Do slide. This paper size applies to China National Standards CNS) Α4 specifications (210X297 mm) C Please read the notes on the back before filling in this card.) Pack 'Order printed by the Ministry of Economic Affairs Central Consumer Bureau Cooperative Printed by the Ministry of Economic Affairs Printed by the China Standards Bureau Consumer Consumer Cooperative Printed A \ 1〇97 A7 _________B7 V. Description of the Invention (3) Therefore, in the magnetic disc device in its related technology, since the disc cartridge is loaded at the moment when the disc cartridge is loaded, the magnetic head is on the same outermost magnetic track, 〇〇, If it slides above, its outermost magnetic track, 〇〇, is likely to be damaged. In addition, in its magnetic disc device, because the rotating speed of its magnetic disc is increasing, it has been tried to achieve high Density writing operations, and thus the storage capacity of the magnetic discs, have increased. In this type of magnetic disc device, the buoyancy caused by the air current generated by the high-speed rotation of the magnetic disc will be added to the magnetic head. Therefore, the yellow magnetic recording / reproducing operation is performed in a state where the magnetic head slightly floats above the magnetic disc, so that the surface of the magnetic disc will not be damaged. However, at the moment when the disc cartridge is loaded, the head carriage will drop quickly, so that the head approaches the magnetic disc. Therefore, even in the above-mentioned magnetic head floating type magnetic disc device, the magnetic head system is likely to hit the magnetic disc. In addition, in such a large-capacity magnetic disc device, the disc cartridge is loaded in the disc cartridge. At this moment, the magnetic head is attached to the same outermost magnetic track I⑼, and its topmost magnetic track, 00, is likely to be damaged. In the large-capacity magnetic disc device A, due to the small distance between their tracks, "when the disc surface is damaged, its writing error or reproduction error will occur", and its writing will not be performed. / Reproduced action. In addition, when the disc cartridge is loaded into the magnetic disc device, when its writing or reproducing actions are not performed, the magnetic disc is rotated at a high speed, and the magnetic head is Near the same magnetic track of the magnetic disc, once the vibration is added outside the magnetic disc device, the magnetic head will slide on the same track of the magnetic disc, and it will be possible to make the magnetic disk Paper size: Chinese National Standard (CNS) A4 specification (21〇 '乂 297mm) I * --------- iT --.---- f {Please read the precautions on the back first (Fill in this page) -6-41709 7 Consumers 'cooperation with the Central Bureau of Standards of the Ministry of Economic Affairs. The company printed A? --------- --- B7_ V. Description of the invention (一 "' Magnetic properties of discs The film is damaged. SUMMARY OF THE INVENTION It is an object of the present invention to provide a disc device capable of eliminating the above problems. A disc device manufactured according to the present invention includes: a magnetic head conveyor, which can be used to support a A magnetic head for performing recording / reproducing on a disc-shaped recording medium; a conveyor moving mechanism that can write on the disc-shaped recording medium Medium—moving the magnetic head conveyor in a radial direction; and a magnetic head raising / lowering mechanism that enables the magnetic head to approach the above-mentioned disc-shaped recording medium, wherein the magnetic head is written on the above-mentioned disc-shaped recording medium After the recording / reproducing is completed on the medium, the carriage moving mechanism can move the magnetic head to a certain position, so that it and the above-mentioned head raising / lowering mechanism make the head approach the above-mentioned disc-shaped writing for the last time The position of the recording medium is different. In this arrangement, a magnetic head is moved to a certain position after the magnetic head finishes writing / reproducing on the above-mentioned disc moon-shaped recording medium. And it is different from the previous position where the magnetic head raising / lowering mechanism brought the magnetic head closer to the disc-shaped recording medium. As a result, the same position of the disc-shaped recording medium will be avoided. It is damaged. So 'it will extend the life of the disc-shaped recording medium, and it will increase the reliability of performing recording / reproduction on the disc-shaped recording medium.' Disc writing Completed writing / reproduction on the media. The paper size is applicable to China National Standard (CNS) A4 (210X297 mm) ------------ 1 pack ------ iT-- 一- --- ^ (Please read the precautions on the back before filling out this page) Printed by Shellfish Consumer Cooperative, Central Bureau of Standards, Ministry of Economic Affairs 4 1109 7. A7 f ---------- B7 V. Invention Explanation (5) After that, the wheel movement mechanism can move the magnetic head to a certain magnetic track, and make it with the above-mentioned magnetic wealth high / lowering mechanism to make the magnetic head Zhao near the above-mentioned disc-like recording The tracks of the media are different. In this arrangement, the same track of the disc-shaped recording medium will be protected from damage. Therefore, it will prolong the life of the disc-shaped recording medium, and it will increase the reliability of performing recording / reproduction on the disc-shaped recording medium. After the recording / reproduction is completed on the recording medium, 'the conveyor moving mechanism moves the magnetic head to a magnetic track, and random selection can be made. * In this arrangement, the same magnetic of the disc-shaped recording medium is used. Orbits will be protected from damage. Therefore, it will prolong the life of the disc-shaped recording medium, and it will increase the reliability of performing recording / reproducing on the disc-shaped recording medium. After the recording / reproducing is completed on the recording medium, the conveyor moving mechanism moves the magnetic head to a magnetic track, and the magnetic head raising / lowering mechanism can make the magnetic head approach the disc-shaped writing for the last time. A track adjacent to the track of the recording medium. In this arrangement, the same track of the disc-shaped recording medium will be protected from damage. Therefore, it will prolong the life of the disc-shaped recording medium, and it will increase the reliability of performing recording / reproduction on the disc-shaped recording medium. A disc device made according to another feature of the present invention includes:-a magnetic head conveyor, which can be used as a branch, can be written in a disc-like recording medium, the paper size applies Chinese National Standard (CNS) A4 specifications (210X297) Li> ----- ------ ΐτ ------ t (Please read the notes on the back before filling out this page) Printed by the Consumers 'Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs' '' Fei 03 li _ B; 5. Description of the invention (6) A magnetic head for performing recording / reproducing on the medium; a carriage moving mechanism that can move the magnetic head carriage in a radial direction of one of the disc-shaped recording media; and The magnetic head raising / lowering mechanism can make the magnetic head approach the above-mentioned disc-shaped recording medium, where 'when its carriage moving mechanism does not move the magnetic head, and the recording / reproducing operation is not performed, then In a state where a recording / reproducing action can be performed, after a period of time longer than a predetermined time, its carriage moving mechanism will move the magnetic head. In this arrangement, when its carriage moving mechanism and When the head is not moved, and the writing / reproducing operation is not performed, then In a state where the recording / reproducing action can be performed, after a period of time longer than a predetermined time, the carriage moving mechanism will move the magnetic head. As a result, the same magnetic track of the disc-shaped recording medium, It will be free from damage. Therefore, it will prolong the life of the disc-shaped recording medium, and it will increase the reliability of performing recording / reproduction on the disc-shaped recording medium. Other purposes and further features will be made clearer by referring to the detailed descriptions of the accompanying drawings below. Brief description of the diagrams Figure 1 shows a plan view showing a recording medium made and written in accordance with the present invention A magnetic disc device in the embodiment of the recording / reproducing device; FIG. 2 shows an exploded perspective view showing the general arrangement of the above magnetic disc device; FIG. 3 shows a front of one of the above magnetic disc devices View; This paper scale is applicable to China National Standard (CNS) A4 specification (210 X 297 mm > ---- ^ install -------- order ------ good (please read the precautions on the back first) (Fill in this page again) -9-

VV Printed by the Central Laboratories of the Ministry of Economic Affairs of the Ministry of Economic Affairs of the Fifth Cooperative Fifth, the description of the invention (7) Figure 4 shows a side view, which can show a state where a disc support and a slider are combined; Section 5Α And FIG. 5B illustrates a state where a first link and a second link are connected to each other; FIG. 6 shows an enlarged plan view showing a head carriage and a peripheral device in an exit mode Figure 7 shows a block diagram of a control system that can be used to exemplify a turntable and a magnetic head conveyor; Figure 8 shows an enlarged plan view that can be displayed in a recording / reproducing mode, a waiting state Magnetic head carriage and its peripheral devices; FIG. 9 shows an enlarged plan view, which can be displayed in the above-mentioned recording / reproducing mode of the magnetic head carriage and its peripheral devices in the case of performing a search operation; 10A, 10B , And 10C 囷 show some front views, they can exemplify the operation of one of the carriage stoppers required for their magnetic head conveyor; circles 11A, 11B, and 11C show some front views, they can exemplify the above-mentioned conveyance Frame stopper and its magnetic The operation of one of the lifting rods required by the arm. The twelfth display shows that they can display the experimental results of the height change of an upper magnetic head during the loading operation of a disc cartridge. Fig. 13 shows when a disc cartridge is inserted. In a disc holder, the flowchart of the program executed by the control circuit; Figure 14 shows an example of a variation of the program shown in Figure 13; Figure 15 shows an example of a variation of the program performed by the control circuit The paper size of this paper is suitable for financial and commercial use ® Home County (CNS) Α4 · (21 () > < 297 public broadcasting) — ~ ------ * --- ^ ------, 1T-- ----- Fate (Please read the notes on the back before filling this page) -10-? A? '~ —_B7_ _ 5. Description of the invention (8) A flowchart. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a disc device according to the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 shows a plan view showing a magnetic disc device 11 in an embodiment of a disc device according to the present invention. FIG. 2 shows an exploded perspective view showing the above magnetic disk > {general arrangement of the device 11} As shown in FIGS. 1 and 2 (a), in the magnetic disk device 11, above the frame 14, A disc support 12 and a slider 13 are installed, the former can be inserted into a disc cartridge (not shown), and the latter can be slid forward and backward to raise and lower the disc support 12 . The slider 13 is arranged on the frame 14 so as to be able to slide in the directions of a and B and to insert into the above-mentioned disc cartridge. The slider 13 will slide in the direction of A to make the disc The sheet support 12 is moved from a loading / unloading position of a conveying rack to a loading position of a certain round feeding rack. A turntable 15 which can be driven by a disc motor (not shown) to rotate a magnetic disc, and a magnetic head conveyor capable of supporting their magnetic heads 16, p. The mechanism 18 'is set to protrude from the surface 14a of the frame 14. On the bottom side 'of the frame 14, a circuit board (not shown in the drawings) with a control circuit is mounted. The head-carrying frame 18 'has a transport frame body 19 and a head arm 20, the former can support the lower magnetic head 16 on the top surface of an extended end thereof, and the bottom surface of the extended end of the latter The magnetic head 17 is supported on it, and is mounted on the conveying frame 19 in a rotatable manner. The paper bears the standard China Standards (CNS) Standard 8 (21〇 > < 297) -11-Printed by the Ministry of Economy, Central Bureau of Standardization, Shellfish Consumer Cooperation Du 41709 7 A7 _____B7_ V. Invention Explanation (9) The magnetic head conveyor 18 is guided by the guide shafts 21 and 24, the latter extending in their forward / backward direction (directions of A and B) so that they can be in their forward / backward direction Move in the direction. Bearing portions 18a, 18b, into which the guide shafts 21, 24 can be slidably fitted, are respectively provided on the right and left surfaces of the head transport frame 18, respectively. The bearing portion 18a includes a circular hole through which the guide shaft 21 can pass, and a main bearing that can determine the moving direction, horizontal position, and vertical position of the magnetic head conveyor 18. In addition, the bearing portion 8b It is a bearing with an angular 'C · shape, in which the guide shaft 24 can be assembled. Therefore, 'the bearing portion 18b cannot determine the moving direction and horizontal position of the magnetic head carriage 18', but can only determine the vertical position of the magnetic head carriage. The head wheel carriage 18 is guided by their guide shafts 21 and 24, and is driven by the sound coil of a carriage moving mechanism, and moves in the directions A and B. As a result, the magnetic heads 16, 17 supported by the magnetic head conveyor 18 can be located next to the desired magnetic tracks on the magnetic disc (not shown in the drawings) contained in the disc cartridge. Therefore, the magnetic recording / reproducing operation can be performed through their magnetic heads 16,17. Above the bottom side of the slider 13, a damper mechanism 31 is arranged. The damper mechanism 31 includes a damping plate 32 and a torsion spring 33. The former is rotatably disposed on the bottom side of the slider 13, and the latter can apply a force to the damping plate 32. Above the bottom side of the slider 13, a shaft 34 and a hook portion 13a2 are provided, the former supporting the damping plate 32 'in a rotating manner and the latter hooking one end of the torsion spring 33. In the damping plate 32, an elongated hole 32e is formed, which can be assembled and fixed in the paper. The standard of this paper is China National Standard (CNS) A4 (210 X 297 mm) --------- --Installation ------ Order ------ 1 (Please read the precautions on the back before filling this page) -12- ί 41709 1 Α7 _______ Β7 V. Description of the invention (10) Bolt on frame 14 86 »The damping plate 32 is a branch supported by the shaft 34 in a rotating manner, the latter protruding downward from the top plate 13 a of the slider 13. When the slider 13 slides in the directions A and B, the relative position of the plunger fixed on the frame 14 and the shaft 34 of the slider 13 will change. Therefore, the slider 13 The sliding operation will be slowed down as described below. Therefore, the damper mechanism 31 in this embodiment of the present invention is not an oil damper, but a mechanical damper mechanism that uses a spring force applied to the slider 13 to make the slider] 3 的 SLOPERATION REDUCTION # In addition, the damper mechanism 31 is arranged so that the damper mechanism 31 can be moved from the insertion / withdrawal position of its conveyor frame to the loading position of its conveyor frame along with the above sliding Device 3, the direction of movement (direction A), the opposite direction (direction B), applies a force to the slider 13 and then rotates the damping plate 32 over the slider π after a predetermined angle has passed. The damper mechanism 31 can apply a force to the slider 13 along the direction in which the slider π moves (direction A). Printed by the Central Procurement Bureau of the Ministry of Economic Affairs, Shelley Consumer Cooperatives {Please read the precautions on the back before filling out this page} So 'At the beginning of the disc cartridge loading operation, the damper mechanism 31 can pass through the torque spring 33 The spring force slows down the operation of the slider, so it can reduce the rate at which the disc support 12 descends, that is, the rate at which the disc is loaded. In addition, before the disc cartridge and the disc support 12 reach their loading position of the carousel, the direction in which the damper mechanism 31 applies force to the slider 13 will be caused by the rotation of the damper plate 32. So that the damper mechanism 31 can apply force to the slider 13 'in its loading direction (direction A), so that the disc and cassette can reach their loading position on the conveyor. (CNS) A4 size (210X297mm) -13- A7 B7 Central Standards Bureau of the Ministry of Economic Affairs ΗConsumption cooperation 衽 Printing V. Description of the invention (after 11 placements, the disc support 12 is supported at the loading position of its conveyor The arrangement of the main components corresponding to the above arrangement will be described. The disc support 12 includes a top plate 12a and two conveyer guide portions 12b and 12c, which are formed at both ends of the top plate 12a to form f. It is curved so as to support the disc cartridge from both sides thereof. Therefore, the space surrounded by the top plates 12a and the rack guide portions 12b and 12c on both sides, that is, the part where a rack is inserted. The top plate 12a of the support 12 is provided with An opening 12d, in which the magnetic head carriage 18 can be moved. In addition, on the right side of the opening 12d, a lifting rod 25 is provided, which can contact a flange 20a protruding from one side of the magnetic head arm 20. In this way, the magnetic head 17 of the magnetic head arm 20 will be capable of intermittently rising and lowering in response to the rising and falling operations of the disk support 12. Therefore, the disk support 12 and the magnetic head arm 20 ' And the lifting rod 25, etc., can form a magnetic head raising / lowering mechanism. Since the shaft rods 25b 'protruding from both sides of one of the main body 25a of the lifting rod 25 are subject to their upright on the disc support Due to the support of the support portion 12h on the top plate 12a of 12, the lifting rod 25 is supported on the disc support 12. Therefore, 'the lifting rod 25 can be in two directions perpendicular to the moving direction of its conveyor (A, B directions) ) In the direction of E and F. In addition, a pair of coupling pins 12e are provided on both sides of the disc support 12, and they are coupled with the slider π. Since the disc support Two guide portions 12f, 12g protrude from the center of both sides of the seat 12. These guide portions 12f, 12g 'line of the frame 14 fit into the side walls of Mb, 14C provided in the cut-off part of the guide 14d, the inner 14e, and thus can support the disc

------ 1 --- ^ 袭 ------ Order ------ t (Please read the notes on the back before filling in this page; J

A7 B7 Ministry of Economy _ Printed by the Central Consumers ’Cooperative Consumer Cooperative V. Invention Description (i2) The operation of the rise and fall of the seat 12 is guided β As will be described below, the above is set on the disc support 12 A contact portion 25c of the lifting rod 25 on the top plate 12a will move upward and downward according to the operation of the disc support 12, and make contact with the protruding edge 20a of the head arm 20 and the lifting rod 25. Will rotate, so that the head arm 20 gradually descends. The length through which the contact portion 25c extends corresponds to the length of the magnetic disc from its innermost track to its outermost track, that is, its length corresponds to the stroke of the magnetic head conveyor 18. The slider 13 is mounted on the disc support 12 in a sliding manner. The slider 13 includes: a J-shaped flat plate (top plate) 13a; both sides i3b, 13c 'are bent downward from both sides of the top plate 13a; some inclined cut-out portions I3d, they are Provided in the side portions nb, 13c, and the humming pins I2e which can be respectively fitted into the disc support 12; and some coupling holes 13e, which can be respectively connected with the surfaces of the two sides of the frame 14 A protruding edge 14f protruding from the center forms a coupling. In addition, the slider 13 includes a flange i3g ′ which protrudes from the right side of the front end of the slider β. The flange 13g is fixed with an exit button 40 »In addition, a coil spring 41 can apply a force in the direction A To the slider 13. Fig. 3 (a) shows a front view β of one of the magnetic disc devices η As shown in Fig. 3, a front seat plate 27 attached with a disc insertion hole 26 is mounted on the front end of the frame µ. On the upper right side of the top part of one of the previous seat plates 27, a notch portion 27a is provided, in which the above-mentioned eject button 40 can be slidably fitted. Above the rear side of the front seat plate 27, the women's clothing has a flap 28 to cover the disc insertion hole 26, which can be opened along the paper standard (CNS) (_2igx Tencent) (please read the back first) (Notes on this page, please fill out this page)

Figure 4 shows a side view showing that the disc support i2 and the slider 13 are combined with each other. As shown in FIG. 4, the coupling pin 12e of the disc holder 12 is fitted into the slanted cut-out portion 13 (1 of the slider 13). In this way, the coupling pin 12e can be slid toward Slider 13 is driven, and the inclined cut-out portion 13d is driven. In this way, when the slider 13 slides in the direction B, the disc support 12 can be raised to the position where the conveyer rack is inserted / withdrawn Position. When the slider 13 slides in the B direction, the disc support 12 can be lowered to the position where the conveyor is loaded. Therefore, the disc support 12 and the slider 13 can form a write Recording medium conveying mechanism # Referring to FIG. 1, a latching mechanism 36 including a latching lever 38 and a coil spring 41 'is rotatably supported on the top surface of the top plate 12 & of the disc holder 12, and The latter can apply a force counterclockwise to the latching lever 38 »The latching lever 38 includes a lever portion 38a and a movement preventing portion 38b, the former being a pushed portion in action, which can be inserted into the dish as described above The disc cartridge 12 in the disc support 12, which prevents the slider u Move along the disc loading direction (direction A). The lever portion 38 & can be rotated in response to the insertion and ejection of the above-mentioned disc cartridge, and one of the doors of the disc cartridge can be opened and closed. An opening (not shown in the second figure) is provided in the top plate I2a of the disc cartridge. Through this opening, the lever portion 38a of the latch lever 38 can extend into the inside of the disc support 12 In order that the lever portion 38a can be subjected to the above-mentioned push-paper kill standard of the disc cartridge inserted into the disc support 12, the general Chinese bacteria standard (CNS) A4 specification (2 丨 οχ2 ") H- ^^ 1 ί II--* 1 Lt. I-II (Please read the precautions on the back before filling this page) Well-ordered ----------- ll !! -16-

T09.I A7 Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs____B7 V. Description of the Invention (η) 0 One end of the coil spring 41 is fixed in one of the fixing holes 38e of the bolt 38 and the coil The other end of the spring 41 is fixed in a fixing portion 13 i of the slider 13. As a result, the coil spring 41 can apply a force to the latch lever 38 to rotate it in a counterclockwise direction, and to a position where the slider 13 can be prevented from moving, the coil spring 41 can apply a force to the The slider 13 is used to move the slider 13 in the direction in which the disc is loaded (direction A). Therefore, 'the coil spring 41 acts to apply a force in the direction A to the slider 13 to return. The spring can also act as a spring that can reverse the clockwise direction and exert a force on the latch lever 38. As a result, the assembly work can be simplified and the work efficiency will be simplified compared with the case where a member that can apply a force to the latch lever 38 and a member that can apply a force to the slider 13 are separately provided. It can be improved, and its manufacturing cost can be reduced. "When the disc cartridge is inserted into the disc holder 12, the latch lever 38 can be made by pushing the front end of the disc cartridge. Turn clockwise. Then, when the arc-shaped movement preventing portion 38b of the latching lever 38 is separated from the movement-preventing portion 13h of the slider 13 due to the clockwise rotation of the latching lever 38, the above-mentioned subject receives the spiral The slider 13 with the force exerted by the spring 41 will slide in the A direction. As a result of the rotation of the latch lever 38, the protruding end portion 38c of the lever portion 38a will push the disc cartridge in the aforementioned opening direction. In this way, the magnetic heads 16, 17 will be in close proximity to the magnetic disc. When it is time to exit ----------- install ------ order '------ good (please read the precautions on the back before filling this page) This paper size is applicable to China Standard (CNS M4 specification (2Ϊ0 × 297 mm) -17- Printed by the Male Workers Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 1 41709 7 A7 —_________ B7______ 5. Description of the invention (l5) The button 40 is pressed in the direction of B, and therefore the When the slider 13 slides in the same direction, the movement preventing portion 38b will be released due to a movement preventing effect caused by contact with one side surface of the slider 13 to be prevented portion 13h. Thus, the The latch lever 38 will rotate counterclockwise due to the spring force 'of the coil spring 41. As will be described later, a conveyor stopper 45 functions as a locking member, which can be used at the time of withdrawal And in a waiting state, prevent the magnetic head wheel carriage 18 from moving, so that the magnetic heads 16, 17 can be prevented from moving. One of the bodies 45a of the carriage stopper 45 is installed along the a , B direction so as to face the right side of the guide shaft 24. The conveyor stops 45 is similar to the lifting rod 25, and is supported by a bearing portion (not shown in the figure) formed on the frame 14 and can rotate in the directions E and f. The conveyor stopper 45 includes: The purlin 45b, a V-shaped notch portion 45c, a connecting pin 45d, and a shaft 45e, the rack 45b is provided on one side surface of the body 45a, and can prevent the head carriage 18 from moving, The V-shaped notch portion 45c is engaged with a coupling pin 25d protruding from the end of the lifting rod 25. The connecting pin 45d is protruded from the top of the other side surface of the body 45a. Conveyor stopper 45 is rotated around the shaft 45e. In addition, as shown in FIG. 2, a movable tooth facing the rack 45b is provided on the right side surface of the magnetic head conveyor 18 56. The length that the rack 45b extends corresponds to the length of the magnetic disc from its innermost magnetic track to its outermost magnetic track, that is, its length is equivalent to the stroke of the magnetic head conveyor 18 . Therefore, when the conveyor stopper 45 is along the paper size, the Chinese national standard (CN S) A4 size (210X297mm) (Please read the notes on the back before filling in this tile) Binding · Book-18- Consumption Cooperation between Staff and Workers of the Central Bureau of the Ministry of Economic Affairs Du printed A7 ________B7 V. Description of Invention (Ιό) Direction When rotating, the rack 45b can be engaged with the movable rack 56 and thus the carriage stopper 45 can lock the magnetic head carriage 18. The carriage stopper 45 is connected with a link mechanism 46. In this link mechanism 46, a first link 46A and a second link 46B are connected to each other in a rotating manner. The first link 46A is formed into an L-shape in this plan view (see the fifth loading circle). The first link 46A has a shaft hole 46A !. A shaft 76 (see circle 6) standing on the frame 14 is fitted into the shaft hole 46A, so that the first link 46A is rotatably supported on the frame 14 9 the first The link 46A also has a Karma arm, which is engaged with a plunger 49 of a solenoid 48 to be described later. The first link 46A also has a connecting arm 46-83 and a connecting shaft 46A4, the former extending in a direction perpendicular to the Kahe arm 46A2, and the latter being disposed at one end of the connecting arm 46a3 ' And connected to the second link 46B. The coupling arm 46A2 has a bifurcated shape, which can extend to face the top and bottom of the plunger 49, and the coupling arm 46A2 has some coupling cut-off portions 46A6, which are connected with some The humming pins 49a protruding upward and downward from the plunger 49 are engaged. In addition, at the bottom end 'of the connecting shaft 46A4, there are a plurality of separation preventing claws 46 and 8 protruding in the radial direction. The second link 46B has a connection hole 46B2 at one end 'of one of the rod portions 46B! Extending in a straight line. The connection hole 46 is connected to the first link 46A. Further, 'the second link 46B has a fitting hole 46B3 at the other end of its rod portion 46B, i'. The connecting pin 45d 'of the carriage stopper 45 is fitted into the mounting hole 46B3. In addition, the second link 46B has the Chinese National Standards (CNS) (21〇 > < 297 Gong) approved on this paper (please read the note ^ h on the back before filling this page}- · • 19- Consumption cooperation by employees of the Central Bureau of Standards of the Ministry of Economic Affairs • 41709 7 Μ ______ Β7 V. Description of the invention (17) A spring hook hole 46B4 is provided near the mounting hole 46B3. The connection hole 46Ba has A circular shape with a pair of fan-shaped escapements formed on the side wall of its circular hole. These fan-shaped escapements have a protruding shape that can be separated from the prevention claw 46A7 of the first link 46A. Corresponding shape. Section 5A 囷 shows a plan view illustrating a state where the first link 46A and the second link 46B are connected to each other. The figure illustrates a plan which can be used to illustrate the first link 46A and the second link. A side cross-sectional view of a state where the rods 46B are connected to each other. As shown in FIGS. 5A and 5B, 'the assembly of the link mechanism 46 in the device' can be performed on their first link 46A and second A linearly extending shape in which the links 46B are connected linearly to each other And the first link 46A and the second link 46B are rotated within a range between a state indicated by a dotted line in circle 5A. In addition, as shown in FIG. 6, A spring force 'of a torsion spring 47 is applied to the second link 46B, so that the link mechanism 46 enters a state of linear extension. One end portion 47 a of the torsion spring 47 is hooked to the frame 14. A rear end portion 'and the other end portion 47b of the torsion spring 47 are hooked to the spring hook holes 46B4 of the second link 46B < • As a result, the link mechanism 46 is borrowed by the spring of the load bearing spring 47 The force is maintained in a state where it extends linearly. Therefore, the link mechanism 46 can push the carriage stopper 45 in the direction toward the magnetic head carriage 18. The other end portion 47b of the torsion spring 47 is It is curved so that the torsion spring 47 can push in the direction of the above-mentioned conveyor stopper 45 ------------ ΐτ ------- ^ (Please read first. Note: Please fill in this page again) This paper size is applicable to China National Standard (CNS) A4 specification (210X297mm) -20- 4 / r'l Γ " ·--A7 L ·, V-__B7 printed by the Standards Bureau Consumer Cooperative V. Description of the invention (is) The spring hook connection hole 46B4. One of the coil portions 47c of the torsion spring 47 is Assembled around a cylindrical protruding pin 77 protruding above the frame 14. When the solenoid 48 is activated in accordance with instructions given by its control circuit (not shown in the figures), a coil 48b will be subjected to Excitation, and attracting the plunger 49 in the C direction »The Kaghe latch 49a provided at the end of the plunger 49 will be able to engage with the first link 46A of the link mechanism 46. Therefore, when the spool 48 is excited and the plunger 49 attracts the plunger 49 in the C direction, the first link 46A of the link mechanism 46 will rotate clockwise, that is, When the solenoid 48 is not excited due to power supply failure or the like, the plunger 49 will return in the D direction due to the spring force of the torsion spring 47. At this moment, the first link 46A will rotate in the counterclockwise direction, that is, in the direction in which the movement of the conveyor is prevented. In this embodiment, the stroke S of the plunger 49 of the solenoid 48, that is, the stroke in which the plunger 49 can slide, is set to be small. In FIG. 2, a support member 50 is made of a certain sheet metal, and as a result of this support member 50 being fixed to the frame 14, the guide shaft 24, the link mechanism 46, Stern tube 48 and torsion spring 47. In Figs. 1 and 2, a guide shaft 51 is fixed to the frame 14 in a state where one end of the guide shaft 21 is pushed in the C direction perpendicular to the axial direction of the guide shaft 21 described above. ----------- ^ Installation ------ Order ------ Elephant (Please read the precautions on the back before filling this page) This paper size applies to Chinese National Standard (CNS) A4 specifications (210 X297 mm) -21-A7 A7 Printed by the Consumer Cooperatives of the Central Government Bureau of the Ministry of Economic Affairs ___B7 V. Description of the invention (l9) In a voice coil motor 52, there is a magnet (not shown in the figure) Arranged on the frame 14 and a coil 53 are integrally provided on the left side surface of the magnetic head carriage 18. The voice coil motor 52 is disposed at the left side of the guide shaft 21 and is arranged close to the center of gravity of the magnetic head conveyor 18. As a result, the magnetic head conveyor 18 can be driven in the A and B directions by a single voice coil motor 52 ', and thus the magnetic heads 16, 17' can perform a search operation. Therefore, compared with the case where a pair of voice coil motors are provided on both sides of the magnetic head carriage, the magnetic head carriage can be reduced, the moving space of the magnetic head carriage can be reduced, and it is possible The magnetic disc device 11 is downsized. The arrangement of the head carriage 18 and its peripheral devices will be described. FIG. 6 shows an enlarged plane 囷 which can display the above-mentioned magnetic head conveyor 18 and its peripheral devices in an exit mode. As shown in FIG. 6, the magnetic head arm 20 is subjected to a leaf spring 58 via a leaf spring 58. One of the magnetic head conveyors 18 is supported by a supporting table 57 so as to be rotatable in upward and downward directions. The magnetic head arm 20 is urged by a pushing portion 60a extending from a torsion spring 60 in the direction A, and the torsion spring 60 ′ is wrapped around a shaft 59 provided at the rear of the support 57 And hooked to it. In this way, the above-mentioned flange 20a protruding laterally from the head arm 20 will be pushed onto the surface of the contact portion 25c of the lift lever 25 due to the spring force of the torsion spring 60. Because the above-mentioned soil engaging bolt 25d protruding from the end of the lifting rod 25 is combined with the V-shaped notch portion 45c provided at the end of the conveyor stopper 45, the lifting rod 25 The following text paper scales can be applied to the Chinese National Standard (CNS) A4 specifications (2! 0X297 mm) ----------- ^ Installation ------ Order --_---- t-(Please read the precautions on the back before filling this page) -22- Consumption Cooperation by Employees of Central Bureau of Standards, Ministry of Economic Affairs, Printed A7 B7 V. Description of Invention (20) What will be described in the "Should stopper conveyor" 45 rotation operation, and intermittent rotation. Since the plunger 49 of the solenoid 48 is not attracted by the electromagnetic force, its plunger 49 will move in the d direction. In this way, the first link 46A and the second link 46B 'of the link mechanism 46 and the engagement latch 49a of the torsion spring 47 will be maintained at their straight edges due to the pulling of the torsion spring 47. In the state of stretching. As a result, the second link 46B will push the connection latch 45d of the carriage stopper 45 in the C direction. Therefore, the rack 45b of the carriage stopper 45 can be combined with the movable rack 56 of the magnetic head carriage is, and the magnetic head carriage 18 can be locked. In addition, at the rear of the frame 14, an exit detection switch 54 is provided, which can detect whether the slider 13 has been slid in the direction of its exit β. The exit extraction switch 54 can be moved along the exit button 40. The “direction B” being pushed is pushed by one end of the slider 13 and enters its closed state. The following describes the loading operation of the disc cartridge of the magnetic disc device 11 described above. As shown in FIGS. 1 and 3, when the disc cartridge (not shown in the figures) passes through the front seat disc 27, The disc insertion hole 26 is inserted into the disc support 12 'the latch lever 38 will be pushed to rotate clockwise. Secondly, the movement prevention portion 38b 'of the latch lever 38 will thus be separated from the movement prevention portion 13h of the slider 13, and the slider 13 will move in the direction A due to the force exerted by the coil spring 41. Do sliding. As a result of the clockwise rotation of the latch lever 38, the sliding paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) ----------- ^ -(Please read the note on the back before filling out this page) Dingquan-23-

A \ 1〇θ Α7 Β7 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of Invention (21) The movement prevention function of the device 3 will be released as described above, and the disc cartridge The shutter will be opened by the protruding end portion 38c of the lever portion 38a. Both sides of the disc holder 12 are supported by the two side walls 1 and 14c of the cymbal frame 14 and can only be moved in the upward and downward directions. As a result, when the slider 13 is slid in the A direction, the slanted cut-out portion 13d of the slider 13 is driven due to the Kago pins 12e of the disk support 12. 'The disk support 12 will Drop from its carriage insertion / exit position to its carousel loading position. In addition, in its exit mode, the end of the slider 13 extending in the B direction is in contact with the exit detection switch 54 and the exit detection switch 54 can be brought into its closed state. The exit detection switch 54 'will output an exit detection signal to its control circuit β. As a result, the solenoid 48 will be de-excited' and thus the plunger 49 can be moved in the direction of 0. In addition, in the In its exit mode, because the solenoid 48 is not excited, 'the first link 46A and the second link 46B of the link mechanism 46 will be forced to become the spring force Fa of the torsion spring 47' Straight. In this way, the carousel stopper 45 will be pushed in the direction toward the head carousel 18. As a result, its rack 45b will be forced to form a Kaghe with the movable rack 56 of the magnetic head conveyor 18. That is, the spring force Fa of the torsion spring 47 is a connection pin 45d as the driving force Fb ′, so that the conveyor stopper 45 and the mounting hole 46B3 of the link mechanism 46 are combined, and can be along the C direction. Promoted β This paper standard is in accordance with the national standard of China ^^^ From the specifications "⑴〆 ??? 々!" (Please read the notes on the back before filling out this page) -Book-24- Central Bureau of Standards, Ministry of Economic Affairs Printed by ABC B7 A7 B7 V. Description of the invention (22) The head wheel carriage 18 is driven by the voice coil motor 52 along the A and B directions. Therefore, when the voice coil motor 52 is not supplied with power, etc. When no driving force is provided, if there is nothing to prevent the movement of the above-mentioned head carriage 18, the head carriage 18 will be able to move freely. However, in its exit mode, because of the carriage stopper 45, The rack 45b is engaged with the movable rack 56 of the magnetic head conveyor 18, and thus the magnetic head conveyor 18 is locked. 'The magnetic head carriage 18 will be free from free movement. In any other In modal, when there is no power supply, the voice coil It will not provide driving force up to 52. However, because the solenoid 48 is also de-energized, 'the head conveyor 18 will be locked, and the head conveyor 18 will be free from free movement.' Figure 7 shows a block diagram of a control system that can be used to illustrate the turntable 15 and the head conveyor 18. As shown in Figure 7, a control circuit 81 can drive and control the sound via a VCM driver 82 ' Coil motor 52 'whereby the magnetic head conveyor 18 and the magnetic heads 16, 17 can perform the above-mentioned search operation together. In addition,' when the disc cartridge is loaded into the magnetic disc device, the The control circuit 81 can drive and control the disc motor 84 'through a spindle motor driver 83 to rotate the turntable 15 and rotate the magnetic disc (recording medium) 85. In addition, in this One of the control circuits 81 is stored in the memory, as will be described below, and a control program is stored, which can be used to move the control circuit 81 along a radius direction, thereby moving the magnetic heads 16 on the magnetic disc 85. , 17. In addition, A random number generator is connected to the control circuit 81. The paper size is applicable to the Chinese National Standard (CNS) Α4 specification (2 丨 〇X 297 mm) ------- 1 ---: installation ------ Order ------ Good (please read the notes on the back before filling this page) -25- Printed by the Shellfish Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs ^ a yi _Η? __ 5. Description of the invention (23), and The random number generator 86 is a database containing a random number list, which can be used to randomly select a position on the magnetic disc 85, or a randomizer that can randomly output the data on the magnetic disc 85. Position, they are the positions where the magnetic heads 16 and 17 move as described above. Fig. 8 shows an enlarged plan view, which can be displayed in the recording / reproducing mode, and a head wheel in a waiting state. The carriage 18 and its peripheral devices; as shown in FIG. 8, when the magnetic disc device 11 is in a standby state similar to a standby state, a sleep state, etc. in its writing / reproducing mode. , The head conveyor 18 will not perform its search operation. In this case, the solenoid 48 is de-excited. . Therefore, similar to the withdrawal mode shown in the sixth circle, the first link 46A and the second link 46B of the link mechanism 46 will be caused by the spring force Fa of the torsion spring 47. The linear extension and the carriage stopper 45 will be pushed in the direction of the above-mentioned magnetic head carriage 18. In this way, the rack 45b will be forced to form a Gap with the movable rack 56 of the magnetic head conveyor 18. Thus, in the waiting state in its recording / reproducing mode, the magnetic head conveyor 18 will be locked so as to be prevented from moving in the A and B directions. Fig. 9 shows an enlarged plan view showing the head conveyor 18 and its peripheral devices in the case of performing the search operation in the above-mentioned writing / reproducing mode. As shown in Fig. 9, in this case, when the disc cartridge inserted into the disc support 12 is moved to the position where its conveyor is loaded, a disc sensor (in the figure) (Not shown) will be in the ON state. The rotation speed of the disc motor 84 that drives the turntable 15 will reach a predetermined high paper scale. Applicable to China National Standard (CNS) A4 specification (2) 0X297 mm. ) ----------- ^ Install ------ Order ------- East (Please read the notes on the back before filling this page) -26- Central Ministry of Economic Affairs MJ_Β7_ printed by the Bureau of Work and Consumer Cooperatives V. Description of the invention (24) speed, and then the solenoid 48 will be stimulated "Therefore, in this case, the solenoid 48 will be stimulated, and the The C direction attracts the plunger 49. At this moment, since the second link 46B of the link mechanism 46 rotates clockwise, the attractive force of the solenoid 48 will increase, which will be explained below. Therefore, the above-mentioned link mechanism 46 and The first link 46A and the second link 46B connected to the plunger 49 will enter its crossbow state, and the rack 45b of the carriage stopper 45 will be forced to contact the magnetic head conveyor. The movable rack 56 of 18 is separated. As a result, the head carriage 18 will be released by the lock of the carriage stopper 45. In this way, the magnetic head conveyor 18 can receive the driving force of the voice coil motor 52, and perform its search operation along the radial direction (A, B direction) of the magnetic disc. Therefore, the magnetic heads 16, 17 will be brought close to the desired track on the magnetic disc. The plunger 49 attracted along the C direction due to the excitation of the solenoid 48 will be coupled with the first link 46A supported by the shaft 76 on the frame 14 in a rotating manner. The arms 46 into 2 form a coupling. Therefore, the attractive force Fd of the solenoid 48 will be converted into its torsion force Ff for turning the first link 46A, and it will become a pulling force Fe for pulling the connection pin 45d in the D direction. The attractive force Fd of the solenoid 48 is increased during the process of converting the attractive force Fd of the solenoid 48 into a torque Ff, and the first link 46 A is rotated clockwise by this. And make the second link 46B rotate counterclockwise, and because of the result of the rotation of the second link 46B, 'the connection pin 45d will be in the direction of the disc, (read the precautions on the back before filling (This page)-♦ This paper size applies to Chinese National Standard (CNS) A4 (210X297). -27- Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 4tT〇9 7 Α7 _Β7_ V. Description of the invention ( 25) The pulling force Fe is pulled. In addition, 'the attractive force Fd of the solenoid 48 also acts as a driving force Fg', by which the V-shaped notch portion 45c of the conveyor stopper 45 is pushed to push the coupling of the lifting rod 25 in the D direction. Latch 25d · So, even when the attractive force Fd of the solenoid 48 is small, this force will be increased via the link mechanism 46, and will be transmitted to the conveyor stoppers 45 and the lift lever 25 » Therefore, even when the attractive force Fd of the solenoid 48 is a small force, it can still obtain a sufficient driving force. In this way, the power consumption of the solenoid 48 is reduced, and a space required to set the solenoid 48 is reduced, so that its device is reduced. * The head arm 20 will be explained to the above-mentioned conveyance rack. The operation of the actuator 45, the link mechanism 46, the torsion spring 47, and the solenoid 48. Circles 10A, 10B, and 10C show some forward views, and they can exemplify the operation of the carriage stopper 45 required for the above-mentioned magnetic head carriage 18. Section 10A 囷 shows the state of its exit mode. The joint mechanism 46 is urged by the spring force of the torsion spring 47 along the C direction. Therefore, the carriage stopper 45 will rotate in the E direction due to the spring force of the torsion spring 47, and the rack 45b will form a buzz with the movable rack 56 of the magnetic head carriage 18. Together. Therefore, the magnetic head carriage a will be locked by the carousel stopper 45. The 10th state shown in the writing / reproducing mode of the waiting state ^ In this state 'and its exit mode The situation is similar. The link mechanism 46 will be pushed by the spring force of the torsion spring 47 in the direction C. Therefore, 'the stopper 45 of the conveyor will be spring force of the yellow 47 due to the torsion. This paper size applies to the Chinese National Standard (CMS) A4 specification (210X297) ---------- Packing ------ Order-^ ---- East (Please read the notes on the back before filling out this page) -28- 7 09 7 Printed by the Central Standards Bureau of the Ministry of Economy 2. Description of the invention (26) Rotation in the E direction, and the rack 45b will be engaged with the movable rack 56 of the magnetic head conveyor 18, so that the magnetic head conveyor 18 can be stopped by the rotary rack The actuator 45 is locked. Section 10C 囷 shows the state in the case of performing its search operation in its writing / reproducing mode. In this state, as described above, the solenoid 48 will be excited, and the second link 46B 'of the link mechanism 46 will be driven in the D direction. In this way, the carriage stopper 45 will rotate in the F direction due to the driving force of the solenoid 48, and the rack 45b will be separated from the movable rack 56 of the magnetic head carriage 18, And therefore, the above-mentioned magnetic head carriage 18 is locked by the carriage stopper 45 and will be released. In this way, the magnetic head conveyor 18 will perform its search operation along the A and B directions. Figures 11A, 11B, and 11C show some front views, which can illustrate the operation of the above-mentioned conveyor stopper 45 and the lifting rod 25 required for the head arm 20 * Figure 11A shows the state of its exit mode The carriage stopper 45 will rotate in the E direction due to the spring force of the torsion spring 47, and the rack 45 b will be engaged with the movable rack 56 of the magnetic head carriage 18. In addition, because the disc support 12 is raised to the above-mentioned rack insertion / exit position, the lift of $ 25 will also increase. In the above-mentioned support member 50 substantially fixed to the frame 14, an adjusting bolt 74 which can be used to adjust the height of the lifting rod 25 will be rotated. The bottom of the adjusting bolt 74 will come into contact with a contact portion 75 extending from the end of the lifter 25. Therefore, by changing the adjustment of the adjustment of the bolt 74, the paper wave scale is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 mm). — —-(Please read the note ^^ on the back before filling this page )--29- A7 B7 Printed by the Consumer Cooperatives of the Central Government Bureau of the Ministry of Economic Affairs of the People's Republic of China. 5. Description of the invention (27 to the amount of the supporting member 50, it will be possible to adjust the raising amount of the lifter 25. In addition, in this While the disc support 12 is being raised to its insertion / withdrawal position, the above-mentioned contact portion 75 with the lifting rod 25-body forming will come into contact with the bottom end of the adjusting bolt 74. The lifting rod 25 It is supported by the top surface of the disc support 12, and can be rotated about its shaft 25b in the directions E and F. Therefore, the above-mentioned contact portion 75 extending from the lifting rod 25 to the right can be supported by the disc. The seat 12 moves upward and comes into contact with the bottom end of the adjustment bolt 74 'and thus the lifting rod 25 can be rotated in the direction of F. In addition,' the above-mentioned flange 20a protruding from the head arm 20 to the right is related to the The left side of the lift lever 25 makes contact. Therefore, when the lift lever 25 When the sheet support 12 moves upward and rotates in the F direction, the flange 20a 'of the magnetic head arm 20 will be lifted by its contact portion 25c. In this way, the magnetic head arm 20 can be maintained in its upward moving position, where The upper magnetic head 17 is separated from the lower magnetic head 16. At this moment, the coupling latch 25d of the lifting rod 25 is separated from the V-shaped notch portion 45c of the carriage stopper 45. Fig. 11B shows The waiting state in its recording / reproducing mode. In this state, the head arm 20 will temporarily stay at the intermediate position between its insertion / exit position and its disc loading position. When the sheet support 12 moves downward, the above-mentioned coupling latch 25d 'protruding from the end of the lifting rod 25 in the direction b is inserted into the V-shaped recess portion 45 <: of the conveyor stopper 45. Then, 'The coupling pin 25d of the lifting rod 25 will be accepted by the V-shaped notch portion 45c of the conveyor stopper 45, and will be associated with the wheel: ---------- rA-- ---- ΐτ --- ^ ---- ^ (Please read the note ^^ on the back before filling in this education) -30- Employees' Cooperatives of Biaofeng Bureau, Ministry of Economic Affairs 41709 7 A7 ________B7_ V. Description of the Invention (28) The inclined portion of the V-shaped notch portion 45c of the carriage stop 45 comes into contact. Therefore, the head arm 20 will stay in its insertion / exit position to its disc The center position between the chip loading positions. Therefore, the above downward movement of the head arm 20 moving with the lifting rod 25 will be temporarily suspended. In this waiting state, because the head arm 20 is descending to its disk Before the sheet loading position, it stays at the above-mentioned intermediate position. The magnetic head 17 supported by the protruding end of the magnetic head arm 20 faces the magnetic head 16 supported by the protruding end of the transport frame body 19. Wait for a predetermined space S in the middle. Therefore, the magnetic head 17 is located above the magnetic disc (not shown in the figure). In addition, 'the lower magnetic head 16 does not contact the magnetic disc described above until the disc support 12 is lowered to the loading position of its transport rack.' However, due to the result of the disc support 12 being lowered, the magnetic The disc will slowly come into contact with the magnetic head 16 due to the weight of the magnetic disc. Figure 11C shows the state in the case of performing its search operation in the recording / reproducing mode. In this state, the solenoid 48 will be excited, and the link mechanism 46 will be driven in the D direction as described above. Thus, the carriage stopper 45 will rotate in the F direction due to the driving force of the solenoid 48, and its rack 45b will be separated from the movable rack 56 of the magnetic head transport rack 18. As a result, the lock of the head carriage 18 will be released. The V-shaped notch portion 45c of the conveyor stopper 45 can push the lifting rod 25 downward in response to the rotation of the conveyor stopper 45 in the F direction. The paper size is applicable to the Chinese national standard (CNS) ) A4 specification (210X297 mm) ------------ ^ ------- II (Please read the precautions on the back before filling out this page)% -31-Central Ministry of Economic Affairs F 4 1ί 局 '·· A7 --—— ________ B7 printed by the Bureau of Standards and Construction Cooperatives' Fifth, the coupling pin 25d of the description of the invention (29). In this way, the lifting lever 25 can be rotated in the direction F in response to the rotation of the conveyor stopper 45 described above, and the contact portion 25c of the lifting lever and the lifting lever 25 will be lowered. Thus, 'the magnetic head arm 20 will descend, so in the above-mentioned waiting state', the upper magnetic head π supported by the magnetic head arm 20 stays in the vicinity of the magnetic disc (not shown in the drawings) after the above. , The street should be lowered and moved by the head arm 20 to make contact with the above magnetic discs, so that the upper magnetic heads Π and the lower magnetic heads 16 will come into contact, and thus the above magnetic discs will be lost in the middle β Therefore, the upper magnetic head 17 will be intermittently moved to a recording / reproducing position 'wherein, the upper magnetic head Π will be able to come into contact with the above magnetic disc. As a result, the above-mentioned magnetic disc rotating at a high speed can be relieved by the vibration of the upper magnetic head 17 '. In this way, the magnetic film formed on the surface of the magnetic disc can be protected from damage. The withdrawal operation is exactly the opposite operation to the loading operation described above, and its description will be omitted. The twelfth circle shows the experimental results that can show the height change of the upper magnetic head 17 described above. In Fig. 12, curve I shows a characteristic curve of a related technical command, a device without a damper. Curve ϋ shows its related art t, a characteristic curve of a device using a damper mechanism that can reduce the operating speed of the slider with a viscous damper. The curve BI shows the characteristic curve of the above-mentioned head arm 20 in the case of gradual decline as in the embodiment of the present invention. * When their I, π, and m are compared with each other, it will be understood ---- ------- i installation ------ order --- ^ ---- east (please read the precautions on the back before filling this page) This paper standard is free to use Chinese National Standard (CNS) A4 Specifications (210X297 mm) -32- Printed by the Shellfish Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 417097 A7 ______B7 V. Description of the invention (30) There are the following differences: In the case of curve I where a damper is not used, because There is no damper that can slow down the loading operation of the disc cartridge. As a result of the sliding operation performed by the slider, their disc supports and head arms will fall rapidly. The upper magnetic head supported by the head arm will drop rapidly, and will push the magnetic disc above its lower magnetic head. "As a result, when its upper magnetic head hits its lower magnetic head via the magnetic disk, its counteraction occurs. Due to the force, its upper magnetic head will beat, so that Repeated impacts of the magnetic disc. In this way, the magnetic film formed on the surface of the magnetic disc will be damaged. In the case of using the curve ϋ of the above-mentioned damper, although the operating speed of its magnetic head will be slowed down, because these disc supports and The magnetic head arm is a single stroke from the position where the disc (conveyor) is inserted / withdrawn, lowered to the position where the disc (conveyor) is loaded, and the position of the magnetic head is very high. Not very effective. In this way, although the loading operation of the disc cartridge will be slowed down by its damper, when its magnetic head comes into contact with the magnetic disc, the operation of its magnetic head will be accelerated. Therefore, in the above magnetic disc device using the damper, compared with the case where the damper is not used, the falling rate of the magnetic head will be decelerated, because the deceleration effect of the magnetic head arm is not sufficient. When the lower magnetic head is hit by the magnetic disc, the upper magnetic head will repeatedly hit the magnetic disc due to the jump of the upper magnetic head. In this way, the magnetic film formed on the surface of the magnetic disc is likely to be damaged. This paper size is applicable to Chinese National Standard (CNS) Α4 specification (210 × 297 mm) -----------. • Attack ------ Order-: ---- (Please read first Note on the back page, please fill in this page again) -33- Printed by the Central Bureau of Standards, Ministry of Economic Affairs, Shellfish Consumer Cooperative A7 ______B7__ V. Description of the Invention (31) In contrast, according to the present invention, the operation of the slider 13 The speed will be decelerated by the mechanical damper mechanism 31 and the lowering operation of the head arm 20 is performed intermittently. As shown by the curve in FIG. 12, the magnetic head 17 can be seen along the Its operating speed in the height direction is gradually changed, and it is the slowest. In the case of the magnetic disc device 11 made according to the present invention, the loading operation of their disc support 12 and head arm 20 is as described above with reference to Figures 11A, 11B, and 11C, In the waiting state, the lifting rods 25 and the head arms 20 are temporarily stopped at an intermediate position between their insertion / reproducing position and the disc loading position. In this waiting state, the magnetic head 17 supported by the extended end of the magnetic head arm 20 is near the magnetic disc and stays at the above-mentioned intermediate position when the lower magnetic head 16 will be supported by the disc. The seat 12 is lowered, and the magnetic disc mentioned above makes contact. However, since the above magnetic disc is caused by the weight of the magnetic disc itself and comes into contact with the lower magnetic head 16, the magnetic film of the above magnetic disc will not be damaged. In this waiting state, the rotation speed of the disc motor 84 that moves the turntable 15 will reach a predetermined rotation rate. Then, the solenoid 48 will be excited, so that the above-mentioned magnetic head conveyor is The lock will be released, and at the same time, the rotation operation of the lifting rod 25 will start, and the above-mentioned lowering operation of the head arm 20 will restart. When the magnetic head arm 20 is lowered due to the result of the rotation of the lifting rod 25, the magnetic disk pushed by the upper magnetic head 17 will immediately push the lower magnetic head 16. However, since the magnetic head 17 stays in the middle position, the paper size is applicable to China National Standard (CMS) A4ii (210X297 mm) ----------------- il- ------ t (Please read the note on the back before filling this page) -34- 4Π097 _ ^ __ Five 'Description of the Invention (32) Near the magnetic disc until it comes into contact with the magnetic disc The acceleration of the position will be small. As a result, when the upper magnetic head 17 comes into contact with the lower magnetic head 16 via the above magnetic disc ', the vibration applied to the lower magnetic head 16 will be reduced. Therefore, the magnetic head 17 is located near the magnetic disc. The position 'approaches the above magnetic disc at a slow speed and comes into contact with it. As a result, the magnetic head 17 will not jump when it comes into contact with the magnetic disks mentioned above, and thus its magnetic film will be surely protected from damage. In addition, as can be understood from the curve 1II, the lowering operation of the head arm 20 will be temporarily stopped in its waiting state. In this way, the rate at which the magnetic head 17 comes into contact with the magnetic disc will be sufficiently reduced. In addition, it is to electrically detect the rotation rate of the disc motor 84 driving the turntable 15 to its predetermined rotation rate in its waiting state, and then the solenoid 48 will be excited, and Force the aforementioned magnetic head π to fall. As a result, when the magnetic head 17 comes into contact with the magnetic disk described above, the buoyancy caused by the air flow above the magnetic disk will be applied to the magnetic head 17. In this way, when the magnetic head 17 comes into contact with the magnetic disc, the vibration applied to the magnetic disc will be relieved. Printed by the Consumer Goods Cooperative of the Central Bureau of Probation, Ministry of Economic Affairs

Ml- H-nnn · »1-tl ·--(Please read the precautions on the back before filling out this page) In the magnetic disc device 11 operating as described above, when the upper disc cartridge is inserted into the disc When the chip holder 12 is inside, the control circuit 81 will execute the following procedures. When the disc cartridge is inserted into the above-mentioned disc holder 12, the control circuit 81 will execute the procedure shown in item 13). In step si (hereafter, the term "step" will be omitted), when the disc cartridge is inserted into the above-mentioned disc support, the paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) -35- Economy 4i7QBI at _______B7_ printed by the Ministry of Work of the Central Government Bureau of the Ministry of Work V. Description of the Invention (33) When seat 12 is in 'S2, the disc motor 84 will be driven to rotate. In S3' the solenoid 48 will be excited, and thus the lock of the above-mentioned head carriage 18 will be released. That is, as a result of the solenoid 48 being excited, the link mechanism 46 will enter its deformed state, and thus the carriage stopper 45 'will be forced to interact with the magnetic head carriage. 18 apart. At the same time when the lock of the above-mentioned magnetic head conveyor .18 is released, ‘the rotation operation of the lifting rod 25 will start, and the above-mentioned downward movement of the head arm 20’ will start again. The upper magnetic head 17 will move from a waiting position 'to its recording / reproducing position, wherein the upper magnetic head 17 is in contact with the magnetic disc 85 described above. Therefore, the writing / reproducing operation of "in S4" can be performed on the magnetic disc 85 via their magnetic heads 16,17. Then, the information can be written on the magnetic disc 85, or the information written on the magnetic disc 85 can be read. In S5, the magnetic head conveyor 18 will be moved by the above-mentioned voice coil motor 52, and their magnetic heads 16, 17 will be forced to perform their search operation. "Then in S6, it will be able to decide whether Give a stop order. When it is decided in S6 that a stop instruction is not issued, §4 will be executed again, and thus its writing / reproducing action will be executed. However, when it decides to issue a stop instruction in S6, it executes §7. Then in S7, the positions of their magnetic heads 16, 17 above the magnetic disc 85 will be randomly selected. At this moment, their magnetic heads corresponding to the values output by the random number generator 86 above will be selected randomly. Stop position This paper size applies to the Chinese national standard {CNS) Α4 size (210 × 297 mm) (Please read the precautions on the back before filling out this page) -Book-36- Duty Consumption Cooperation, Central Office of the Ministry of Economic Affairs System V * Α7 _______ Β7 ___ 5. Description of the invention (34) (magnetic track). Then in S8, power will be supplied to the voice coil motor 52, and thus the magnetic head carriage 18 can be driven in a radial direction of the magnetic disc. Therefore, their magnetic heads 16, 17 will be forced to perform their search operation. Then in S9, 'it will determine whether their heads 16, π have reached the selected head stop position (track)'. When it is determined in S9 that these heads have not reached the selected head stop position (track), 'S8 will be executed again, and thus its search operation will continue. However, when it is determined in S9 that the heads have reached the selected head stop position (track) as described above, S10 will be executed again, and thus' the power supplied to the voice coil motor 52 above will be stopped, and their The search operation of the magnetic heads 16, 17 will stop. Then in S11, the excitation of the solenoid 48 will be stopped, and therefore the head carriage 18 will be locked. That is, the solenoid 48 will be de-energized. The link mechanism 46 will be forced to extend in a straight line, and thus the rack 45b of the above-mentioned carriage stopper 45 will be compatible with the above-mentioned magnetic head carriage 18. The movable racks 56 are humming together. Next, while the above-mentioned magnetic head carriage is locked, the lift lever 25 will rotate, the magnetic head arm 20 will be raised, and the upper magnetic head 17 will be separated from the magnetic disc 85. In S12, it will decide whether to issue a writing / reproducing instruction. When it decides to issue a write / reproduce instruction in S12, S3 will be executed again, and thus their processes starting from S3 will be executed again. However, 'when it decides not to issue a writing / reproducing instruction in S12' S13 will be executed 'and therefore it will determine that the disc card sheet paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm); ---------- Order ^ --- ^ ---- line (please read the note on the back before filling out this page) -37- Member of the Central Government Bureau of the Ministry of Economic Affairs ΗConsumer Cooperation Du Yinzhuang 4 1709,1 V. Description of Invention (35)-Whether the box has been withdrawn. When it is determined in S13t that the disc > | card cassette has not been ejected, si2 will be executed again. However, when it is determined in SI3 that the disc cartridge has been withdrawn, the SU will be executed, and thus the rotation of the disc motor material will be stopped, and their current procedures will be terminated. Therefore, when the writing / reproducing is completed and the stop instruction is given, the head carriage 18 will be forced to perform its search operation and thus move away from the magnetic disc 85 described above in the upper magnetic head 17 and the head carriage Before 18 is locked, the magnetic heads 16, 17 will move to the head stop position randomly selected by the magnetic disc 85 (the track p results that the upper magnetic head 17 will approach the magnetic disc 85 'and form with it) The position where it contacts (track) will be different from the position where the upper magnetic head 17 approached the magnetic disc 85 last time and made contact with it. As a result, the magnetic heads 16, 17 will be evenly aligned with the magnetic disc 85. The entire surface is in contact. In this way, the same track of the magnetic disc 85 will be protected from damage. \ Figure 14 shows a flowchart of an example of a variation of S7 shown in Figure 13®. In Figure 14 'In S21', the track number 'η' stored in the memory of one of the control circuits 8 mentioned above, where the upper magnetic head 17 approached the magnetic disc 85 last time and made contact with it, is from the control circuit 81 Memory read In S22, it will determine whether the track number, η ·, is the innermost track-when it determines the track number in S22, η · 's track is not the innermost track. When the track is selected, a track number 'η + Γ' is selected in S24. Therefore, in this example, when the stop order is issued, if the above paper size applies the Chinese National Standard (CNS) Α4 specification (2 i 0 X 297 mm) -38- I ---- ^ ------ ir ------- 't (Please read the note ^ K on the back before filling this page) Ministry of Economy Printed by the Central Bureau of Standards Consumer Cooperative A7 ---------- B7_ V. Description of the Invention (36) The magnetic track 17 that approached the magnetic disc 85 and made contact with it last time is its The innermost track is the number of the outermost magnetic track, and if the upper magnetic head 17 last approached the magnetic disc 85 and made contact with it, it is not the innermost track. The track number of the inner track adjacent to the upper magnetic head 17 approaching the magnetic disc 85 and in contact with it is selected. Then, the upper magnetic head 17 moves away from the above Before the magnetic disc 85 and the magnetic head conveyor 18 are locked, the magnetic heads 16, 17 will move to the magnetic track of the number that has been so selected by the procedure shown in Fig. 14. As a result, the upper part The magnetic head 17 will approach and come into contact with the magnetic disc 85, and its magnetic track will be different from the magnetic track on which the upper magnetic head 17 approached the magnetic disc 85 and made contact with it last time. As a result, the magnetic heads 16, 17 'will be able to make uniform contact with the entire surface of the magnetic disc 85. In this way, the same magnetic track of the magnetic disc 85 will be protected from damage. A flowchart of a variation paradigm. As shown in FIG. 15, in S41, when the head conveyor 18 is stopped, 'the heads 16, 17 are stopped, and the recording / reproducing operation is also stopped,' a timer of one of the control circuits 81 described above, Time measurement will begin in the middle of S42. Then in S43, it will decide whether the writing or reproducing operation has started. When the operation of deciding to write or reproduce in S43 has begun, its current operation is completed, and its operation of writing / reproducing will be performed. However, when the action of deciding to write or reproduce in S43 did not start, this paper size adopts the national standard of China (CNS) A4 (210X297 mm) -39- -------..- --.- Name ------ Order: ------------- line (please read the precautions on the back before filling this page) Printed by A7 _B7_ 5. Description of the invention (37), and when the head conveyor 18 is in its stopped state, S44 is executed, and thus it will determine whether the time measured by the timer has exceeded a predetermined time T. Until Before the time measured by the timer exceeds the predetermined time T, S43 and S44 will be repeated again and again. When it determines in S44 that the time measured by the timer has exceeded a predetermined time T, it is in S45. These magnetic heads 16, 17 are selected to be prepared to be moved to the position of the magnetic disc 85. At this moment, they will select their head stop positions (tracks) corresponding to the values randomly rotated by the random number generator 86 described above. Alternatively, select the track number selected last time in S45 of the program shown in Figure 15 The track β of the number obtained as a result (when the addition results in the track number of the innermost track, the outermost track is selected). Then 'in S46, S47, and S48', perform the other Results similar to those of S9, and S10 ". As a result, the search operation can be performed in the mode of writing / reproducing (ie, the magnetic heads 16, π are next to the magnetic disc 85) , But the search operation has not been performed, and the recording / reproducing action has not been performed, when the heads 16 and 17 are next to the magnetic disc for a period longer than its predetermined time (pre-delay time T) The position of 85 will be forced to change. So 'the magnetic heads 16, 17 will be free from being close to the same track of the magnetic disc 85 for a long time. As a result, the same track of the magnetic disc 85' will be Protected from damage β Although in the above-mentioned embodiment, when the magnetic heads move away from the magnetic discs described above, the magnetic head conveyor will be locked. 'It can also provide another kind of magnetic When a disc is used, the magnetic head can be used to feed the paper. Standard (CNS) Α4 specification (21〇χ297 公 董} ---- -40- ----------- installation ------ order; ---; ---- line ( Please read the notes on the back before filling in this page) ms A7 B7 Ministry of Economic Affairs_Central Bureau of Standards for Offshore Consumers Co-operation, Printing and Printing V. Description of the Invention (38) The arrangement of the feeder is not locked. The recording / reproducing action is' the magnetic heads are moved during the search operation (that is, in the radial direction of the magnetic disc) 'and then the magnetic heads will move closer to the above magnetic discs' and In addition, in this arrangement, it is possible to prevent the magnetic heads from contacting the same magnetic track of the magnetic discs each time the magnetic heads approach the magnetic discs mentioned above and come into contact with them. In this way, 'it is possible to make the above magnetic disc the same. A magnetic track is protected from damage. In addition * Although the above-mentioned embodiment is a magnetic disc device, the present invention is exemplified' can also be applied to an optical disc device, a Magnetic disc device, a recording / reproducing device in which a card-like recording / reproducing medium like a memory card, etc. can be loaded. Even if the slider is slid above its disc support in the above-mentioned embodiment, the present invention can also be applied to an arrangement in which its slider is slid below its disc support. The present invention is not limited to the above-mentioned embodiments, and various modifications and modifications can be made without departing from the scope of the present invention. The contents of Basic Patent Application No. i0_045718 filed on February 26, 1998 and No. 11-028126 filed on February 5, 1998 will be incorporated by reference into this specification. This paper size applies to China National Standard (CNS) Α4 specification (2 丨 〇X 297 公 董) -41-• ^ ϋ. HI 1 ^ 1 »nn ^ i —Lr— 1 ^ 1 I (Please read the note on the back first $ Item, please fill out this page), ΤΓ Φ I 417091 A7 B7 V. Description of the invention (39) Comparison of component numbers 15 ... Turntable 16 .... Lower magnetic head 17 .... Upper magnetic head 18 ... Magnetic head carriage 18a, ... 18b ... bearing part 19 ... conveying frame body 20 .... head arm 21,24 ... guide shaft 25..lifting rod 25a ... Ben Zhao 2 5 b _.drawing rod 25c ..... contacting portion 25d · .. Kaghe plug 2 6… disc insertion hole Central Ministry of Economic Affairs of the Ministry of Economic Affairs and Consumer Cooperative Printing 11… magnetic disc device 12… disc support 12a ... top plate 12b, 12c " .conveyor guide Leading portion 12d ... Opening latch 12f, 12g ... Leading portion 12h ... Supporting portion Π ... Slider 13a ... Top plate 13a2 ... Hook portion 13b, 13c ... Side portion 13d ... Inclined Cut-off part 13e ... Coupling hole 13g ... Flange 13h ... Move part to be prevented 14 ... Frame 14a ... Surface 14b, 14c ... Side wall 14d, 14e ... Guide cut-out part 14f , 20a ... Flange 27 .. Front seat plate 27a ... Mouth part 28 ... Folder 31..Damper mechanism 32..Damper plate 32e ... Elongated hole 33..Torsion spring 34,59 ... Shaft -42- This paper uses the Chinese National Standard (CNS) A4 specifications (210X 297 mm) 41709T V. Description of invention (40) A7 B7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 36 .. Latching mechanism 38 .. Lever 38a ... Lever portion 38b. ..Movement prevention part 38c ... protruded end part 38e ... fixed hole 40 ... exit button 41 .. coil spring 45 .. conveyor stopper 45a ... main body 4 5 b ... rack 45c ... V-shaped notch portion 45d ... connecting pin 45e ... shaft 46 ... link mechanism 46A ... first link 46B ... second link 46A, ... Shaft hole 46A2 ... Boom arm 46A3 ... Connecting arm 46A4 ... Connecting shaft 46A6 ... Boom cut-out portion 46A7 ... Separation prevention claw 46B1 ... Lever portion 46B2 ... Connecting hole 46B3 ... .Assembly hole 46B4 ... Spring hook connection hole 47 ... Torque spring 47a ... End portion 47b ... End portion 47c ... Coil portion 48 ... Solenoid 48b ... Coil 49 ... Plunger 49a ... Mesh Latch 50 .. Support member 51 .. Guide shaft 52 .. Voice coil motor 53 .. Coil 54 .. Exit Test switch 56 ... movable rack 57 .. support stand 58 .. leaf spring 60 ... torsion spring 60a ... pushing part 74 ... adjusting bolt 75 ... contact part 7 6 ... shaft; ------------ meaning ------ order --- ^ ---- line (please read the precautions on the back before filling this page) This paper size applies Chinese national standards ( CNS) A4 specification (2 丨 OX297 mm) -43- A7 B7 V. Description of the invention (41) 77.... Cylindrical protruding pin 86 ... pin 81 ... control circuit fa ... spring force 82 ... VCM drive fb, fg ... Propulsion 83 .. Mandrel motor drive fd ... Attraction 84 .. Disc motor fe ... Pull power 85 ... Magnetic disc ff ... Torque 86 .. .. Random number generator; --- --- ----silver (please read the precautions on the back before filling this page) Economy Printed on paper by the Consumer Standards Cooperative of the Ministry of Standards of the People's Republic of China, using Chinese National Standard (CNS) A4 (2 ω X 297 mm) -44-

Claims (1)

4 i / 09 7 -ϋΐ £ ϋ £ § ___, patent application scope I _ a disc device, including: a magnetic head conveyor, which can be used to support a disc recording medium Reproduced magnetic heads; a carriage moving mechanism that moves the magnetic head carriage in a radial direction of the above-mentioned disc-shaped recording medium; and a magnetic head raising / lowering mechanism that allows the magnetic head to approach the above The disc-shaped recording medium, wherein after the magnetic head has completed the writing / reproducing operation on the above-mentioned disc-shaped recording medium, the conveyor moving mechanism can move the magnetic head to a certain position, and It is different from the position where the above-mentioned head raising / lowering mechanism brought the head toward the above-mentioned disc-shaped recording medium for the last time. 2. The disc device as claimed in item 1 of the scope of patent application, wherein after the magnetic head has completed recording / reproducing on the above-mentioned disc-shaped recording medium, the carriage moving mechanism can move the magnetic head To a certain track, and it is different from the above-mentioned head raising / lowering mechanism to make the head approach the track of the disc-shaped recording medium for the last time. 3. The disc device as claimed in item 1 of the scope of patent application, wherein after the magnetic head has completed the writing / reproducing operation on the above-mentioned disc-shaped recording medium, the carousel moving mechanism makes the magnetic head One of the tracks moved is randomly selected "4. For the disc device applied for in item 丨 of the scope of patent application, in which the magnetic head is completed on the above-mentioned disc-shaped recording medium, and the recording is reproduced. After the operation ', the conveyor moving mechanism moved the magnetic head to a certain magnetic paper size using the Chinese National Standard (CNS) A4 specification (210X297 mm) II--I * J. ---- rtx__ f Please read the notes on the back first and then fill in the tile.) Order the Pai-Consumer Cooperative Du Yinzhuang-45, 4 \ l09 of the Ministry of Economic Affairs. 6. The scope of the patent application track is the same as the above mentioned magnetic head elevation. / The lowering mechanism brought the magnetic head closer to a magnetic track adjacent to the magnetic track of the above-mentioned disc-shaped recording medium for the last time. 5. A disc device including: a magnetic head conveyor, which can be used to support an Perform recording / reproducing operations on a disc-shaped recording medium A magnetic head; a carriage moving mechanism that can move the magnetic head conveyor in a radial direction of one of the above-mentioned disc-shaped recording media: and a magnetic head raising / lowering mechanism that can cause the magnetic head to approach the above-mentioned disc shape Recording medium, where 'when its carriage moving mechanism does not move the magnetic head, and the recording / reproducing action is not performed, in a state where the recording / reproducing action can be performed, a period longer than After a predetermined time, its carriage moving mechanism will move the magnetic head. (Please read the notes on the back before filling this page) .1T line! Printed by the Consumer Goods Cooperative of the Central Government Bureau of the Ministry of Economic Affairs This paper is suitable for the national ladder (CNS) A4 (210X297 mm) of the country t -46-