JPH04132643U - magnetic disk device - Google Patents

Abstract

(57) [Summary] [Purpose] To smoothly eject the disk cartridge 1. [Structure] A spring is provided for ejecting the disk cartridge 1. An elastic pressing portion 75 is provided which presses the main surface of the disk cartridge 1 using this spring when the disk cartridge 1 is ejected. This pressing portion 75 is arranged so as to be in contact with the vicinity of the end of the cartridge 1. Therefore, the pressing portion 75 does not contact the shutter of the cartridge 1.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention uses a floppy disk or similar magnetic disk to generate signals. The present invention relates to a magnetic disk device for recording or reproducing data.

0002

[Conventional technology]

A magnetic disk car that houses a magnetic disk with a diameter of 86 mm in a rigid case. tridges (microfloppy disks) are already known. This magnetic disk A drive cartridge consists of a magnetic disk, a case that covers it, and a magnetic disk installed in the case. It consists of a shutter that covers the opening for inserting the head, and when the shutter is opened, the head can be inserted. is configured to make contact with the screen.

0003

[Problem that the idea aims to solve]

A disk device that performs recording or playback using a disk cartridge as described above. is a shutter opening/cartridge ejector consisting of a rotating body and a spring that biases the rotating body. When the cartridge is inserted, the rotating body rotates against the spring. The shutter is opened by the rotating body, and at the time of ejection, the rotating body is opened by the above spring. The cartridge is configured to be ejected by rotation. However, the shutter Because of this, the strength of the spring cannot be made too weak. For this reason, Ije When the cartridge is empty, the cartridge is suddenly ejected, which may make the user feel uneasy. Also, since the cartridge is inserted with enough room in the disk device, There is a risk of vibration in the thickness direction of the cartridge during ejection. Therefore, this idea The purpose of this is to provide a magnetic disk device that can smoothly eject cartridges. It is about providing.

0004

[Means to solve the problem]

To achieve the above object, the present invention uses a magnetic disk and at least a disk rotation. a case having a diversion opening and a magnetic head insertion opening and covering the disk; a shutter attached to the case to selectively cover the magnetic head insertion opening; for recording or reproducing information using a magnetic disk cartridge consisting of a disk rotation mechanism including a motor for rotating the magnetic disk; and a magnetic head that faces the magnetic disk and records or reproduces information; A head including a motor for moving the magnetic head in a radial direction of the magnetic disk. a moving mechanism; and a mechanism for ejecting the cartridge in a direction in which a surface of the cartridge extends. and a spring that biases the cartridge in response to an ejection operation of the cartridge. a cartridge ejection mechanism configured to eject the cartridge; In a magnetic disk device, when the cartridge is ejected, the main body of the cartridge is A member is provided that elastically presses a portion of the surface where the shutter is not provided, and this The cartridge is configured to be ejected by the spring against pressure from the member. The present invention relates to a magnetic disk device characterized by the following.

[0005]

[Effect]

By arranging the pressing member as described above, damage to the shutter can be prevented and the cartridge can be removed. This allows for smooth discharge.

[0006]

【Example】

Next, referring to FIGS. 1 to 17, a floppy disk device according to an embodiment of the present invention will be explained. Explain the location. The disk device shown in FIGS. 1 to 14 has a flowchart shown in FIGS. 15 to 17. Device for recording or reproducing information using disc cartridge 1 It is.

[0007] As shown in FIGS. 16 and 17, the magnetic disk cartridge 1 has a diameter of 86 mm. It is constructed by housing a magnetic disk 2 in a rigid synthetic resin case 3. ing. Head insertion openings 4a and 4b are provided on both the front surface 3a and the back surface 3b of the case 3. are provided, and when not in use, these openings 4a and 4b are closed by a sliding shutter 5. It is closed. The shutter 5 is U-shaped so as to span from the front surface 3a to the back surface 3b. The engagement piece engages with the groove 6 provided on the back surface 3b as shown in FIG. slide along one side of the base 3. Move the shutter 5 to the right (close direction) in Figure 16. A torsion spring 7 is housed in the case 3 in order to bias the shaft. 5 is being pressed. The magnetic disk 2 is installed in the center of the magnetic sheet part 2a. It consists of a metal hub 2b. Exposed from the opening 8 on the back side 3b of the case 3 The hub 2b has a spindle insertion hole 2c and a positioning and driving pin insertion hole 2. d is provided. Note that the disk is inserted into the shutter 5 through the openings 4a and 4b. Windows 5a and 5b are provided for exposing the.

[0008] A device for recording or reproducing using the cartridge 1 shown in FIGS. 16 and 17. A disk device consists of a disk rotation mechanism, magnetic head, head movement mechanism, and cartridge. Includes guide mechanism, circuit board, etc. Figure 8 shows the disk device with the circuit board removed. A plan view, and FIG. 9 is a front view. As is clear from these drawings, the disk device is , one (lower) magnetic head 11 and the other (upper) magnetic head 11 facing this one magnetic head 11 is brought into contact with one surface of the disk 2. recording or reproducing, and bring the other magnetic head 12 into contact with the other surface of the disk 2. recording or playback. As shown in FIG. 10, one magnetic head 11 is located in the lower cap. The magnetic head 12 is fixedly attached to the ridge 13, and the other magnetic head 12 is the upper carriage. The head support arm 14 is attached to the head support arm 14. The head support arm 14 is a plate spring 1 5 is attached to the lower carriage 13, and this plate spring 15 and arm 14 are attached to the lower carriage 13. The magnetic head 12 is brought into contact with the disk 2 by the pressing coil spring 15a. biased in the direction. Note that the head carriage 13 is connected to a stepping motor. The disk is moved by a known head movement mechanism consisting of a rotational motion-linear motion conversion mechanism. It is configured to be able to move in two radial directions.

[0009] The disk rotation mechanism includes a disk rotation motor 16 shown in FIGS. 1 and 9 and a disk rotation motor 16 shown in FIGS. It consists of a rotary body 17 for rotating a coupled disk. The rotating body 17 is connected to the disk 2. It engages with the metal disk 2b and rotates while supporting the disk 2, as shown in FIG. The spindle 17a, the magnet 17b for attracting the metal disk 2b, and the driving pin and 17c. The spindle 17a is provided on the metal disk 2b shown in FIG. The drive pin 17c is inserted into the hole 2c, and the drive pin 17c is inserted into the hole 2d.

0010 In Figures 1 and 9, it is inserted from the front, in Figure 8 it is inserted from the bottom upward, and in Figure 1 2, hold the disk cartridge 1 that is inserted from right to left and insert the disk. from the non-engaging position (non-rotating position) to the engaging position (rotating position) of the rotating body 17 A cartridge holder 18 is provided for guiding the cartridge up to. This cartridge As best seen in FIGS. 1 and 8, the cartridge holder 18 is attached to the back surface 3 of the cartridge 1. A base portion 19 that supports the b side, and a pair of side portions 20, 2 rising vertically from the base portion 19. 1, a top plate 22 for determining the height position on the surface 3a side of the cartridge 1, and a cartridge 1. The stopper surface 23a that determines the insertion position of the cartridge 1 and the head support arm engagement portion 23b. Guide pins 24 and 25 are provided on the pair of side surfaces 20 and 21, respectively. As shown in Figure 13, this can be called a chassis or a container. It is inserted into the guide hole 26a of the support base 26 that can be formed. The guide hole 26a is shown in FIG. 3 extends in the vertical direction, that is, in the axial direction of the rotating body 17 in FIG. Guide you in the direction of.

[0011] Cartridge holder movement to move the holder 18 in the axial direction of the rotating body 17 The mechanism is composed of a slide body 27. As is clear from Figure 11, this Like the holder 18, the slide body 27 is made by bending a metal plate into a U-shape. The central bottom part 28 is parallel to the base of the holder 18, and the holder is vertically raised from the central bottom part 28, which is parallel to the base of the holder 18. from a pair of side surfaces 29 and 30 arranged parallel to the side surfaces 20 and 21 of the router 18. Become. The disk cartridge 1 is inserted into the bottom surface 28 of this slide body 27. A plurality of long holes 31 extending in the direction are provided and are implanted in the base bottom 32 shown in FIG. A guide pin 33 is inserted. This slide body 27 is connected to this guide pin 33. It slides in the direction of insertion of the cartridge 1 while being guided by. Slide body 27 and holder 18 so as to have a certain relationship with the side surface of the slide body 27. 29 is provided with two inclined grooves 34 as shown in FIG. A pin 24 protruding from the slanted groove 34 engages with the slanted groove 34 . Therefore, in Fig. 12, the slide body 2 7 slides to the right, the pin 24 is pressed downward by the edge of the inclined groove 34, and the pin 24, the holder 18 moves from the position shown in FIG. 12 to the position shown in FIG. In addition, already A similar groove is provided in one side surface portion 30, and the pin 25 engages therein. The springs 35 and 36 shown in FIG. 11 bias the slide body 27 downward in FIG. It is. That is, the springs 35 and 36 move the holder 18 to the disk engagement position (rotation). holder 18 through the slide body 27. It is.

0012 The slide body 27 is held in place so that the holder 18 is kept in the non-engaging position (non-rotating position). The locking mechanism for locking against the screws 35 and 36 is a locking lever as shown in FIG. 37, the locking release sliding plate 38, and the locking recess 39 provided in the slide body 27. It has as a main component. The locking lever 37 is connected to a shaft 40 implanted in the holder 18. It has a locking pin 41 near one end and an engagement hole near the other end. It has 42. Further, a bar provided between the holder 18 and one end of the locking lever 37 A counterclockwise biasing force is applied to the locking lever 37 by the screw 43 in FIG. There is. The locking recess 39 of the slide body 27 is arranged in the vertical direction (cartridge insertion direction) in FIG. ) is provided in a recessed state from a surface 44 extending in the direction shown in FIG. The locking lever 37 is shown in Figure 8. Since it is biased counterclockwise, the engagement between the pin 41 and the recess 39 is maintained stably. held. The lock release sliding plate 38 prevents the linear movement of the cartridge 1 when it is inserted into the locking lever. It has a function of converting the rotational movement of the bar 37 into rotational movement. This sliding plate 38 is installed on the holder 18. It is guided by the curved guide part 45 and slides in the vertical direction (cartridge insertion direction) as shown in FIG. move. The end surface 38a of this sliding plate 38 is in contact with the cart when the cartridge 1 is inserted. It is arranged at a position where it is pressed by one side of the ridge 1. Therefore, the cartridge The sliding plate 38 moves following the insertion movement of the edge 1. This sliding plate 38 has an engaging pin. A pin 46 is implanted and inserted into the engagement hole 42 of the locking lever 37, and then the edge It is inserted into the engagement hole 48 of the projector/shutter opening/closing lever 47. If pin 4 6 is not associated with the shutter opening/closing lever 47, the sliding plate 38 The locking lever 37 rotates clockwise following the upward sliding movement in FIG. The locking pin 41 comes out of the recess 39 of the ride body 27, and the slide body 27 is locked. When released and before the shutter 8 is opened, the slide body 27 is moved by the springs 35, 3 shown in FIG. A force of 6 causes a downward displacement in FIG. However, in reality, the shutter opening/closing lever Since the pin 46 is inserted into the engagement hole 48 of the locking lever 37 and the opening/closing lever, The bars 47 are interrelated and are restricted from independent movement.

[0013] The shutter opening/closing lever 47, which also has an eject function, is attached to a shaft embedded in the holder 18. 49, and a shutter opening/closing pin 50 is attached to one end of the rotating body. have. A spring 51 is provided between the opening/closing lever 47 and the holder 18. Therefore, the opening/closing lever 47 is always rotated in the counterclockwise direction (cartridge eject direction) in Fig. 8. direction).

[0014] The heads 11 and 12 are brought into contact with the disk 2 so that data can be converted, and the disk The head loading mechanism for separating the head from the disk 2 uses springs 15 and 15a to load the head. The arm 14 is biased in the direction of the The protrusion 14a and the holder 18 provided on the arm 14 to be displaced according to the and an engaging portion 23b provided at. As shown in FIGS. 1 and 12, the holder 18 When in the high position (disc non-engaging position), the engaging part 23b of the holder 18 The arm 14 is lifted and the upper head 12 is inserted into the cartridge 1 insertion path. It's out of line. However, if the holder 18 is in a low position (disc-engaging position) as shown in FIG. position), the arm 14 follows the descent of the holder 18 and the engaging portion 23b. The head 12 also rotates, and the head 12 comes into contact with the disk 2.

[0015] As a radial movement mechanism for the heads 11 and 12, as shown in FIG. A motor 52 and a threaded rod 53 are provided. The threaded rod 53 is provided on the base body 26. is coupled to a stepping motor 52 and screwed to the carriage 13. Therefore, when the threaded rod 53 rotates, the carriage 13 and heads 11 and 12 move toward the disk half. Move radially.

[0016] The printed circuit board 54 is connected to the disk rotation motor 1, as illustrated in FIG. 6 control and drive circuit 55, head movement stepping motor 52 control and drive circuit 55; The dynamic circuit 56 is connected to the magnetic heads 11 and 12 and is generally called a read/write circuit. It has a signal processing circuit 57 and the like that are publicly known. Further, the circuit board 54 includes the head 11, The connector 59 to which the wiring lead wire 58 etc. for 12 is connected is installed. Ru. As is clear from FIG. 1, this circuit board 54 includes the cartridge 1 and the holder 1. 8 and is fixed to the base body 26. Note that the circuit board 54 includes An opening 60 corresponding to the support arm 14 of the upper head 12 is provided.

[0017] First and second lead clampers/cartridges made of synthetic resin shown in Figures 1 to 7 The guide members 61 and 62 are connected to holes 63, 64, 65, 66 provided in the circuit board 54. is attached to. That is, the first lead clamper/cartridge guide member 61 has two rising parts 67, 68, and these rising parts 67, 68 are connected to the holes 63, 6. 4 and protrudes from the upper surface of the substrate 54, as shown in FIG. In addition, the board 5 4, the lead clamper/cartridge guide member 61 can be easily attached using elasticity. In addition, grooves 69 and 70 are provided for stable mounting. Also, the rising part Since 67 and 68 are also divided, it is possible to insert the lead wire into this dividing groove. It is. Similarly, the second lead clamper/cartridge guide member 62 also has a rising portion. It has grooves 71 and 72 and grooves 73 and 74, and is attached to the circuit board 54.

[0018] The first lead clamper/cartridge guide member 61 is an elastically displaceable cart. It has a ridge pressing part 75. As is clear from FIG. 3, this pressing portion 75 Cart It is configured to elastically press the surface 3a of the cartridge 1 when the ridge 1 is attached or detached. It is. As is clear from FIG. 1, the pressing portion 75 is located on the surface of the disk cartridge 1. Since it touches only the left end of 3a, it does not touch the shutter 5. Therefore, the pressing part 75 Therefore, a situation where the shutter 5 is deformed does not occur. Note that this pressing part 75 is It is located at the lower left of the board 54 in FIG. 2, which is relatively far from the heads 11 and 12, and As shown in FIG. 5, a U-shaped substrate holding portion 76 has.

[0019] The first lead clamper/cartridge guide member 61 is adjacent to the opening 60. A gas line extending linearly from near the cartridge insertion opening to a position near the head 12 at the position. It has a guide portion 77 and a guide portion 78 extending perpendicularly thereto. It is placed on the bottom side of 4. Second lead clamper/cartridge guide member 62 also has a linearly extending guide portion 79, and one member 61 with respect to the opening 60. is placed on the opposite side.

[0020] The guide portions 77, 78, 79 of the first and second members 61, 62 are located below the substrate 54. From the side, the terminal pins of the connector 59 or the terminals of circuit elements not shown in the diagram, etc. It also stands out very high. Furthermore, the lower surface of each guide portion 77, 78, 79 is shown in FIG. It is located below the position of the upper head 12 at the unloading position shown.

[0021] Next, the operation of this device will be explained. If the cartridge 1 is inserted through the opening 81 of the front panel 80 shown in FIG. The upper part is restricted by guide parts 77, 78, and 79 arranged on the lower surface of the circuit board 54. The cartridge 1 enters the holder 18 in this state. Note that the tongue-shaped pressing portion 75 Since the cartridge 1 is hanging down, the cartridge 1 is inserted against this. Cartridge 1 Since the insertion is generally done manually, it is not necessarily possible to insert the holder parallel to the holder 18. I can't. Therefore, if guide portions 77, 78, 79 are not provided, The cartridge 1 is connected to the terminals or printed circuits of circuit elements on the board 54, or to the upper head. 12 and may be damaged. However, in this example, the guide Due to the provision of sections 77, 78, 79, such problems do not occur.

[0022] When cartridge 1 is inserted, the tip of case 3 of cartridge 1 will first be inserted. It engages with the pin 50 of the shutter opening/closing lever 47. Continue inserting cartridge 1. 8, the lever 47 rotates clockwise in FIG. 8, and the pin 5 is rotated as shown in FIG. 0 presses the right side of the shutter 5 to the left, opening the shutter 5. As a result, The opening 5a of the shutter 5 and the opening 4a of the case 3 match, and the magnetic disk 2 is exposed. do.

[0023] On the other hand, by inserting the cartridge 1, the cartridge is attached to the end surface 38a of the sliding plate 38. When the side of cartridge 1 hits and further inserts cartridge 1, it will follow the advance of cartridge 1. Accordingly, the sliding plate 38 also moves forward. As a result, the locking lever 37 is moved by the pin 46. 8 in the clockwise direction, and the locking pin 41 is displaced in the direction of coming out of the recess 39. Ru. When the cartridge 1 is inserted to the final position, the locking pin 41 is removed from the recess 39. Get out. This releases the restriction on the movement of the slide body 27, so the slide The body 27 is moved downward in FIG. 8 and to the right in FIG. 12 by the force of the springs 35 and 36 shown in FIG. move in the direction. Note that the locking by the locking pin 41 is released by the locking by the pin 50. It is configured to be carried out after the opening of the terminal 5 is completed.

[0024] The slide body 27 is provided as a holder moving mechanism. 27 is displaced, the holder 18 moves from the disengaged position shown in FIG. 12 to the position shown in FIG. to the engagement position. Note that the holder 18 is lowered by the side surface 2 of the slide body 27. The inclined grooves 34 provided on the sides 9 and 30 and the pins 24 on the side surfaces 20 and 21 of the holder 18, This is achieved by engagement with 25. When the holder 18 is lowered to the position shown in FIG. The hub 2b of the disk 2 in the cartridge 1 is attached to the rotating body 17. At this time, Although the drive pin 17c may not align with the hole 2d, in this embodiment, the cartridge The motor 16 is energized to rotate the rotating body 17 in synchronization with the completion of insertion of the edge 1. Then, the drive pin 17c enters the hole 2d within a short time, and the rotating body 17 and the disk 2 Complete engagement is established. Note that when the holder 18 is lowered to the position shown in FIG. The pin 33 presses the back surface 3b of the cartridge 1 through the opening 19a of the holder base 19. Then, the cartridge 1 is fixed to the holder 18.

[0025] As mentioned above, when the holder 18 moves from the position shown in FIG. 12 to the position shown in FIG. Following this, the head support arm engaging portion 23b is also displaced, and the head arm 14 is moved by the spring 1. The heads 11 and 12 rotate clockwise in FIG. 10 by the force of 5 and 15a, and the heads 11 and 12 The device is in a loaded state where recording and playback is possible. At this time, the shutter 5 of the cartridge 1 is completely closed. Since the head 12 descends after being opened, the head 12 does not hit the shutter 5. There isn't.

[0026] When taking out the cartridge 1, use the ejector provided on the slide body 27. Press the operation part 27a to the left in FIG. Slide body 27 with springs 35 and 36 When pressed against this, the positional relationship between the locking pin 41 and the slide body 27 changes and The ring 41 enters the recess 39. Slide body 2 until pin 41 enters recess 39 7, the holder 18 follows the slide body 27 and moves from the position shown in FIG. 14 to the position shown in FIG. At the same time, the head support arm 14 is also moved from the loading position to the unloading position shown in Figure 1. The head 12 is moved to the read position and the head 12 is sufficiently separated from the disk 2. By the way, the lock Rotation of the locking lever 37 is restricted until the pin 41 enters the recess 39. . Therefore, despite the movement of the slide body 27 and the rise of the holder 18, the locking lever -37, sliding plate 38, and shutter opening/closing lever 47 are substantially stationary; The shutter 5 is prevented from being displaced in the closing direction. After that, the locking pin 41 enters the recess 39, the locking lever 37 is rotated counterclockwise by the force of the spring 43. The rotation of the shutter opening/closing lever 47 is released, and the shutter opening/closing lever 47 is rotated. 47 is rotated counterclockwise by the force of the spring 51 and returns to the position shown in FIG. As a result, The restriction on the shutter 5 by the pin 50 of the opening/closing lever 47 is released, and the shutter 5 is released from the cover. A spring built into the cartridge 1 returns it to the closed position shown in FIG. shutter open The closing lever 47 is biased counterclockwise by a spring 51, and the pin 50 is Since the side of the cartridge 1 is pressed, the cartridge 1 is pressed against the shutter opening/closing lever 4. It is ejected following the counterclockwise rotation of 7. For this reason, the shutter is opened. The closing lever 47 also functions as an eject lever.

[0027] By the way, the spring 51 of the lever 47 is not very weak due to its relationship with the spring 7 of the shutter 5. cannot be set properly. For this reason, if the cartridge pusher related to this embodiment If the pressure part 75 is not provided, the strong spring 51 will cause the cartridge 1 to suddenly move. It may jump out and cause the user to feel uneasy. However, in this example, the pressure Since the portion 75 presses the surface 3a of the cartridge 1 and applies braking, the cartridge The cartridge 1 is slowly ejected. Further, the pressing portion 75 is located on the surface of the cartridge 1. 3a, so it does not touch the shutter 5 at the center of the cartridge 1. . Therefore, the cartridge 1 can be installed and removed smoothly and the shutter 5 will not be damaged. . Moreover, if the pressing part 75 is not provided, the cartridge holder 19 Cartridge 1, which has been inserted with sufficient margin, may vibrate when ejected. However, by providing the pressing part 75, this vibration can be prevented and the cartridge 1 is ejected.

[0028] As described above, in this embodiment, the circuit board 54 is provided with a lead clamper and a cartridge guide. Since the guide members 61 and 62 are installed, the circuit board 54 is placed close to the cartridge 1. As a result, the disk device can be made thinner. Also, the members 61 and 62 are attached to the circuit board 5. 4 and also serves as a clamper for the lead wire 58, simplifying the device and reducing costs. Cost reduction is achieved.

[0029]

[Modified example]

The present invention is not limited to the above-mentioned embodiments, but can be modified as follows, for example. It is. (a) A magnetic disk with a diameter of 76 mm is housed in the case instead of cartridge 1. A microfloppy disk with a synthetic resin hub in the center of the disk. It is also applicable to devices that use In this case, the hard drive of the magnetic disk The clamp is held between a rotary table or spindle and a clamper facing it and is driven to rotate. . It is also applicable to other disk devices. (b) A hole is provided in place of the engagement hole 48 of the eject/shutter opening/closing lever 47. It is also possible to have a cam surface without a cam surface. (c) In the embodiment, the head support arm 14 is displaced to follow the holder 18. However, the arm 14 is rotated following the linear movement of the slide body 27. You may. (d) It is also applicable when only one of the heads 11 and 12 is provided. Ru. In this case, the head is placed on one side of the disk 2, and the pad is placed on the other side. A disk 2 is held between the head and the pad. (e) Following the displacement of the slide body 27 and the holder 18, the head 12 or this Instead of moving the replacement pad to a position where it contacts disc 2, move it to a position near the disc. It may also be moved to the desired position. In this case, use the headload plunger A lenoid is provided to create a head loaded state during recording and playback. (f) An elastic member is arranged on the top plate 22 of the holder 18 to prevent the car from loading when the disc is loaded. The cartridge 1 may be positioned via an elastic member.

[0030]

[Effect of the idea]

As is clear from the above, the part near the end of the cartridge away from the shutter part A pressing member is provided to press the cartridge elastically, so there is no damage to the shutter. Smooth ejection of cartridges without damage or shutter obstruction can do.

[Brief explanation of drawings]

FIG. 1: A circuit board of a floppy disk device according to an embodiment of the present invention, members according to the present invention installed therein,
FIG. 3 is a front view showing a part of the parts related to the above.

FIG. 2 is a plan view showing part of a disk device having a circuit board.

FIG. 3 is a cross-sectional view showing a part of the line AA in FIG. 2;

FIG. 4 is a plan view showing a first lead clamper/cartridge guide member.

FIG. 5 is a front view of the member of FIG. 4;

FIG. 6 is a plan view showing a second lead clamper/cartridge guide member.

FIG. 7 is a front view of the member of FIG. 6;

FIG. 8 is a plan view showing the disk device with the circuit board removed.

FIG. 9 is a front view of the device of FIG. 8;

FIG. 10 is a side view of the head portion of FIG. 8;

FIG. 11 is a plan view showing the slide body of FIG. 8;

FIG. 12 is a sectional view showing a portion of the device of FIG. 8 along line BB.

FIG. 13 is a left side view of the device of FIG. 8;

FIG. 14 is a sectional view corresponding to FIG. 12 showing a state in which cartridge loading is completed;

FIG. 15 is a plan view showing the relationship between the cartridge and the lever.

FIG. 16 is a plan view of the cartridge.

FIG. 17 is a bottom view of the cartridge.

[Explanation of symbols]

1 Disc cartridge 18 Cartridge holder 47 Shutter opening/closing lever 50 Shutter opening/closing pin 51 Spring 75 Elastic pressing part

Claims (1)

[Scope of utility model registration request] 1. A magnetic disk, a case having at least a disk rotation opening and a magnetic head insertion opening and covering the disk, and a case attached to the case so as to selectively cover the magnetic head insertion opening. This is a device for recording or reproducing information using a magnetic disk cartridge consisting of a shutter, a disk rotating mechanism including a motor for rotating the magnetic disk, and a shutter for rotating information facing the magnetic disk. A head moving mechanism including a magnetic head for recording or reproducing, a motor for moving the magnetic head in a radial direction of the magnetic disk, and a spring biasing the cartridge so as to eject the cartridge in a direction in which a surface of the cartridge extends. and a cartridge ejection mechanism configured to eject the cartridge in response to an ejection operation of the cartridge, wherein the shutter on the main surface of the cartridge is moved when the cartridge is ejected. A magnetic disk device characterized in that a member is provided for elastically pressing a portion where the cartridge is not provided, and the cartridge is ejected by the spring against the pressing force of the member.