JPH06318377A - Disk device - Google Patents

Abstract

PURPOSE:To reduce the dimensions of the device in length, width and thickness by disposing a driving shaft for moving a head near a side periphery of a disk cassette in the direction of inserting the disk cassette. CONSTITUTION:A cassette guide 15 for guiding the disk cassette 11 in the disk device is positioned in its right and left direction shifling to one side from the center of the device, so that a space is formed by this shift on the other side of the device, and in this space, a cassette loading mechanism 33 for moving the cassette guide to a loading position and an unloading position and a head seek mechanism 18 for moving heads 17A and 17B in seek operation are disposed. By this method, the length, width and thickness of the device can be reduced, and hence the device can be miniaturized, reducing its weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device for recording or reproducing information on a disk, and more particularly to the structure and arrangement of a head seek mechanism in the disk device.

[0002]

2. Description of the Related Art The above-mentioned disc device is a device for recording or reproducing information on a disc-shaped recording medium such as a magnetic disc or a laser disc. The disk is rotated by driving a motor, and recording or reproduction is performed while moving the head in contact with or close to the disk. In this case, the head is mounted on the carriage and is moved (seek) by the motor along the radial direction of the disk.

In the above-mentioned disk device, on a base supporting each component, an insertion / ejection means for mounting and ejecting a disk cassette, a disk rotation driving means for rotating a disk by a motor, and a head along a radial direction of the disk. Head seek means for moving to an arbitrary track position, head load means for loading and unloading the head with respect to the disk, and the like are provided. Further, a control circuit for controlling the entire disk device, a power supply connector, etc. are provided, and the control circuit is connected to a host device or the like via an interface.

Such a disk device is used as an external storage device of an electronic device such as a personal computer or a word processor and may be configured as an independent device. However, in general, it may be incorporated in the main body of the electronic device. Many. Further, with the miniaturization and portable use of electronic devices, there is a strong demand for the disc device to be smaller, lighter and thinner.

The insertion / ejection means for mounting and ejecting the disc (disc cassette) includes a cassette guide having a guiding function for inserting, ejecting, loading and unloading the disc cassette, and a loading position and an unloading position of the cassette guide. It is composed of a drive means (loading mechanism) for moving the disk cassette to an ejecting mechanism, an eject mechanism for exerting a disc cassette pushing function according to the position of the cassette guide, and the like. Further, the disc device includes a cassette opening means that engages with the shutter of the disc cassette and operates to open the shutter when the disc cassette is inserted.

The head loading means for bringing the head into contact with the loaded disk is generally constructed to operate in conjunction with the loading operation of the cassette guide (disk cassette).

[0007]

In the conventional disk device, the head arm on which the head is mounted is arranged at the back side of the cassette guide (the rear part of the disk device).
Since the drive shaft for moving the head arm is arranged along the head arm, the length of the device increases and the thickness of the device increases, which makes it difficult to reduce the size and weight of the device. There were challenges.

The present invention has been made in view of the above technical problems, and an object of the present invention is to reduce the length and thickness of the device and to reduce the size and weight of the device. It is to provide a device.

[0009]

DISCLOSURE OF THE INVENTION The present invention provides a disk device for recording or reproducing information on the disk by rotating the disk as a recording medium and moving the head in a predetermined direction. The above object is achieved by arranging a drive shaft for moving the disk cassette in the insertion direction of the disk cassette in the vicinity of the side edge of the disk cassette.

According to another aspect of the present invention, in addition to the above configuration,
The drive shaft is arranged in the vicinity of a rear end of a head arm on which a head is mounted and orthogonal to the head arm, and a region where the head arm is arranged in a cassette guide for guiding the disk cassette. The above-mentioned object can be achieved more efficiently by providing a notch for avoiding the above, or by adopting a configuration in which the drive shaft is a lead screw.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In each of the following drawings, the same reference numerals denote the same parts or corresponding parts. 1 to 4
FIG. 2 is a diagram showing an embodiment of a disk device to which the present invention is applied, FIG. 1 is a plan view showing an internal configuration at the time of unloading with a cover omitted, and FIG. 2 shows an internal configuration at the time of loading of FIG. 4 is a plan view, FIG. 3 is a front view seen from line 3-3 in FIG. 2, and FIG.
FIG. 4 is a rear view seen from the line 4-4 in FIG. 2.

Inside the box-shaped base 10 having an open top,
As shown in FIGS. 1 and 2, each component is housed. The base 10 is formed of a thin metal structure such as aluminum, and its upper surface is a cover (not shown) formed of a non-magnetic thin plate material such as aluminum for magnetic shielding and dust prevention. Is covered. As shown in FIG. 3, a front panel 13 having a cassette insertion opening 12 for inserting and ejecting the disc cassette 11 is attached to the front surface of the base 10. A push button (eject button) 14 that is operated when ejecting the loaded disk cassette 11 is provided at the left end of the front panel 13.

In FIG. 1 and FIG. 2, the disk cassette 11 is inserted, ejected and loaded into the base 10.
A cassette guide 15 for guiding unloading is held movably up and down and back and forth. The cassette guide 15 is a disc cassette 1 that is inserted from the front.
1 has a cross-sectional shape that guides and holds 1, and in the illustrated example, the notch 16 is formed by removing the substantially left half of the rear portion (back portion).
Has a planar shape. Further, the cassette guide 15 is mounted at a position shifted to the right side with respect to the base 10 (rightward shift position), and a space for arranging other components is formed on the left side of the base 10. ing.

In FIGS. 1 and 2, the disc cassette 1 is provided in the region of the notch 16 of the cassette guide 15.
A head seek mechanism 18 having a head 17 for recording or reproducing information on or from the disk (information medium) in 1 is provided. This head seek mechanism 18
Is a mechanism for moving (seeking) the head 17 to an arbitrary track position along the radial direction of the disk.

A disk (magnetic disk or the like) as an information medium (medium) housed in the disk cassette 11 is opened from a head receiving opening by opening a slidable shutter 19 provided in the disk cassette. It can be accessed from the outside, such as by loading the head 17.

In FIGS. 1 and 2, a shutter lever 21 and a latch lever 22 which are swingable around the vertical shaft 20 provided on the right rear portion of the cassette guide 15 on the upper side of the cassette guide 15 are provided. It is pivotally supported. The shutter lever 21 is used for the disc cassette 1
1 is for opening and closing the shutter 19 of the head receiving opening of the disk cassette 11 in conjunction with the insertion of the disk cassette 11. A pin 23 that can come into contact with the edge is provided. Further, the shutter lever 21 is biased in the counterclockwise (counterclockwise) direction in the figure by a spring 25 stretched between the shutter lever 21 and the cassette guide 15. Further, on the upper surface of the cassette guide 15, a groove 26 having a predetermined length is formed so that the pin 23 can be moved along the movement trajectory of the pin 23.

1 and 2, the latch lever 22 is biased in the counterclockwise (counterclockwise) direction by a latch spring 27, and in the unload state, as shown in FIG. A roller 29 provided at one end of the lever 22 is latched with a stopper 28 formed on the base 10 so as to be latched. At the other end of the latch lever 22, there is provided a pin 30 with which the tip of the inserted disk cassette 11 can come into contact. Thus, the opposite side of the cutout portion 16 of the cassette guide 15, that is, the side where the head seek mechanism 18 and the cassette loading mechanism 33 described later are arranged (a space is formed by bringing the cassette guide 15 and the disc cassette 11 closer to each other). On the opposite side)
A latch mechanism 22 is provided.

FIG. 5 is a view showing a mounting component on the bottom surface of the base 10 with the cassette loading mechanism, the head seek mechanism and the like being removed, FIG.
(B) is a front view seen from the line BB in (A), and (C) is a side view seen from the line C-C in (A). In FIG. 5, a disk-shaped flat motor 31 for driving a disk is mounted on the bottom surface of the base 10 at a substantially central portion thereof. The motor 31 has a central hole (not shown) of the disk cassette 11 and A center pin 81 to be fitted, a drive pin 82 that engages with a drive hole (not shown) provided in the vicinity of the center hole of the disc cassette 11, and a magnet 83 for attracting and holding the hub of the disc are provided. There is.
Further, a positioning pin 84 for positioning the disc cassette 11 in a loading state is provided behind the motor 31, and a positioning surface 85 obtained by cutting and raising a part of the base 10 is provided in the vicinity of the insertion opening 12. It is provided. A circuit board 32 for controlling the disk device is joined around the motor 31.

1 and 2, a cassette loading mechanism 33 for moving the cassette guide 15 to a loading position and an unloading position is provided in a space formed on the left side of the cassette guide 15 in the base 10.
Is provided. Further, the base 10 is provided with an operating lever 34 that extends across the upper side of the cassette guide 15 and that is pivotally supported by the base 10 at both ends so as to be swingable. Button lever 3 of the loading mechanism 33
6 is constantly urged in the direction of the insertion port 12 by the return spring 35, and can be moved rearward against the return spring 35 by pressing the eject button 14. The swing position of the operating lever 34 is restricted by the button lever 36, and the cassette guide 1 is controlled by the swing position.
5 for driving the load position 5 and the unload position.

6 to 9 are partial side views showing the unloading and loading states of the cassette loading mechanism 33. FIG. 6 shows the button lever 3 during unloading.
6 shows a state of the operating lever 34 and the cassette guide 15 at the time of unloading, FIG. 8 shows a state of the button lever 36 at the time of loading, and FIG. 9 shows a state of the operating lever and the cassette guide 15 at the time of loading. Button lever 36
Is supported so as to be slidable in the front-rear direction with respect to the base 10 by a slide guide portion including a pin and an elongated hole.
The return spring 35 constantly urges it to the left (forward) in the figure. The actuating lever 34 is pivotally supported at both ends thereof so as to be swingable about a fulcrum 37 provided on the base 10. Therefore, the notch 38 formed in the button lever 36 and the pin 39 provided on one side of the operating lever 34.
Are engaged.

Further, the cam grooves 4 are provided on both sides of the operating lever 34.
0 is formed, and step-like holding portions 41 are provided on both sides of the base 10. On the other hand, the cassette guide 15
A center pin 42 slidably engaged with the cam groove 40 of the operating lever 34 and a holding portion 41 of the base 10 on both sides of
Is provided with a roller portion 43 that comes into contact with. Since the cassette guide 15 has a left half cutout shape as shown in FIGS. 1 and 2, the holding portion 41 and the roller portion 43 have a total of one location on the left side and two locations on the right and front sides. It is provided in three places.

Next, the operation of each part when loading and unloading the disc cassette 11 will be described with reference to FIGS. Cassette insertion slot 12
When the disc cassette 11 is inserted from (FIG. 3), first the tip of the disc cassette 11 is moved to the shutter lever 21.
The shutter lever 21 rotates in the clockwise (clockwise) direction in FIG. 1 by coming into contact with the pin 23 (FIGS. 1 and 2). At this time, the pin 23 (FIGS. 1 and 2) of the shutter lever 21 comes into contact with the edge of the shutter 19 of the disc cassette 11, and the shutter 19 is returned by the rotation of the shutter lever 21 (insertion of the disc cassette 11). By moving it against (not shown), the head receiving port is opened, and the head 17 can access the disk (medium).

Next, the tip of the disc cassette 11 contacts the pin 30 of the latch lever 22 (FIGS. 1 and 2), and the disc cassette 11 is further pushed (in the inserting direction), so that the latch lever 22 moves to the timepiece (see FIG. The roller 29 of the latch lever 22 is disengaged from the stopper 28 of the base 10 by rotating in the right rotation direction. By releasing the latch, the cassette guide 15 which is restrained by the roller 29 can be moved to the rear of the apparatus (to the right in FIG. 7). The position of the disc cassette 11 in the forward direction within the cassette guide 15 is regulated by the pin 23, which is in contact with the tip thereof, in contact with the rear end of the groove 26 (FIG. 2).

When the disc cassette 11 is pushed further, the cassette guide 15 also moves to the rear side of the apparatus. Therefore, the center pin 42 of the cassette guide 15 (see FIG. 7,
9) horizontally moves the cam groove 40 of the operating lever 34 in the right direction (rear side of the device) in the drawing, and the urging force of the return spring 35 acts on the pin 39 of the operating lever 34 via the button lever 36. By doing so, the actuating lever 34 turns, and the actuating lever 34 turns about the fulcrum 37 from the position in FIG. 7 in the clockwise (clockwise) direction. At the same time, the roller portions 43 (three places) of the cassette guide 15 also move to the rear of the device along the horizontal portion 41b of the holding portion 41. Since the pin 39 moves to the left side in the drawing by the rotation of the operating lever 34, the button lever 36 also moves in conjunction with it. When the disc cassette 11 is further pushed, the roller portion 43 of the cassette guide 15 descends so as to move along the lower vertical portion 41c of the stepped holding portion 41, and the cassette guide 15 is loaded into the cassette loading portion shown in FIG. The state (the state in which the disc cassette 11 is at the load position) is set.

In the loading state in which the cassette guide 15 is lowered downward, the cassette guide 15 is brought into contact with the roller portion 43 of the cassette guide 15 and the lower holding surface (vertical surface) 41c of the holding portion 41 of the base 10. The front and rear positions of are restricted. Further, in this loading state, the disc cassette 11 has the positioning pin 8
4 and the positioning surface 85, the cassette guide 15 is positioned in the mounted state.
It is urged downward by the downward urging force of 4. Therefore, the load position of the cassette guide 15 is regulated by pressing and positioning the upper surface of the disk cassette 11 by the plurality of disk cassette pressing projections 86 (FIGS. 1 and 2) provided on the cassette guide 15. To be done. When the cassette guide 15 is at the loading position, the disc in the disc cassette 11 (specifically,
The hub portion) is magnetically attracted onto the rotor of the disk drive motor 31 (FIG. 5) and is engaged with the center shaft 81 and the drive pin 82 on the rotor to position (high) the disk (media). Direction, direction of rotation). That is, it is set to a loading state in which information can be recorded and reproduced on the disc.

In this loading state, the center pin 42 of the cassette guide 15 is in contact with the cam groove 4 of the operating lever 34.
0 is urged downwardly to the left in FIG.
The front and rear positions are regulated by and the cassette guide 15
Holds the disc cassette 11 in a stable state with respect to the base 10.

When ejecting the disc cassette 11 set in the disc device, the eject button 14 is used.
(FIGS. 3 and 8) is pressed to move the button lever 36 rearward against the return spring 35. When the button lever 36 moves rearward, first, the notch 38 of the button lever and the pin 39 of the operating lever 34 are engaged with each other, so that the operating lever 34 moves counterclockwise from the position shown in FIG. Rotate). Then, the center pin 42 is lifted by the cam groove 40, and the cassette guide 15 moves upward. If you press the eject button 14,
As the cassette guide 15 is lifted, the roller portion 43 is disengaged from the lower holding portion (vertical portion) 41c, and the cassette guide 15 becomes movable to the front of the apparatus (leftward in FIG. 9).

When the eject button 14 is further pushed, the shutter lever 21 and the latch lever 22 are swung counterclockwise (counterclockwise) by the urging forces of the return springs 25 and 27 (FIGS. 1 and 2). , The disc cassette 11 is ejected forward, and the cassette guide 15 is moved forward. At this time, an elastic member for urging the cassette guide 15 forward may be provided in order to facilitate smooth movement of the cassette guide 15. In this embodiment, the operating lever 34 and the cassette guide 1
A spring member 87 (FIGS. 1 and 2) is attached between the spring member 87 and the spring 5. Further, the shutter spring 25 (FIGS. 1 and 2)
May be used. In that case, one end of the shutter spring 25 is attached to the fixed side of the base 10 or the like or the operation lever 34. When the shutter lever 21 moves in the groove 26 and returns, the pin 23 of the shutter lever 21 comes into contact with the front end of the groove 26, and a returning force is applied to the cassette guide 15. Thus, first, the cassette guide 15 is returned to the initial position of FIG. Then, eject button 1
4 is stopped, the urging force of the return spring 35 (FIGS. 6 and 8) causes the button lever 36 and the operating lever 34
Is returned to the initial position (unloading position) shown in FIGS. 6 and 7.

As shown in FIGS. 1 and 2, a head seek mechanism 18 is arranged in the area of the cutout portion 16 of the cassette guide 15. 10 is a line 10-10 in FIG.
It is a longitudinal cross-sectional view of the head seek mechanism 18 portion along the line.
Next, the head seek mechanism will be described with reference to these drawings. In the illustrated example, a cutout 16 is formed on the left side of the rear half of the cassette guide 15 and extends over a region of about a quarter.
However, in some cases, a notch corresponding to this may be provided on the right side of the latter half portion, and in that case, a mechanism corresponding to the head seek mechanism 18 is also provided in the region of this right notch. It will be.

1, 2, and 10, the cassette loading mechanism 3 including the button lever 36 and the like.
3 is arranged, that is, the side of the disc cassette 11 is near the side edge in the space (left side in the illustrated example) formed by moving the cassette guide 15 to one side (right side in the illustrated example). The cassette loading mechanism 33 is arranged along the edge in the insertion direction of the disc cassette 11.
Also, the head seek mechanism 18 is provided.

The head seek mechanism 18 includes a head driving motor 51 fixed to the rear wall of the base 10, a drive shaft 53 composed of a lead screw rotated by the motor 51 via a gear train 52, and the drive shaft. A head carriage 54 that engages with a lead groove of a shaft (lead screw) 53 and can reciprocate by forward and reverse rotation of the drive shaft 53, and a guide bar 55 that is fitted to the head carriage 54 and guides the head carriage 54. A lower head 17B attached to the tip of the head carriage 54, a head arm 57 movably attached to the head carriage 54 via a leaf spring 56, and a tip of the head arm 57. Head 17A attached to the upper part and a head for urging the head arm 57 downward (toward the head load position) Is provided with a spring 58 for over soil, the.

Further, at the tip of the support arm 59 pivotally supported by the base 10, a head lift (head suspension) which extends through the lower side of the head arm 57 and whose other end engages with the upper surface of the cassette guide 15 is provided. Road 61 bar 61
Is attached. The support arm 59 is urged by a spring 62 stretched between the support arm 59 and the base 10 in a direction in which the head lift bar 61 is always in contact with the upper surface of the cassette guide 15, that is, downward. Therefore, at the time of unloading when the cassette guide 15 moves upward, the head arm 57 is lifted to the raised position as shown in FIG. 10, and the upper head 17A is held at the unload position.

As described above, the disk apparatus of this embodiment is constructed so that the upper head 17A and the lower head 17B can be simultaneously loaded onto the upper surface and the lower surface of the medium (disk) in the disk cassette 11. Has been done. Note that FIG. 10 shows a state in which the cassette guide 15 and the heads 17A and 17B are in the unload position, and in this state, the upper surface of the cassette guide 15 (the highest portion) and the upper surface of the head arm 57 (the highest portion).
Are configured to have substantially the same height, that is, to have substantially the same plane. In addition, in this embodiment, FIG.
As shown in 0, the gap between the upper surface of the cassette guide 15 or the upper surface of the head arm 57 and the cover 63 (FIG. 10) covering the open upper surface of the base 10 in this unloading state is set to be as small as possible. The height (thickness) is configured to be as small as possible.

In FIGS. 1, 2 and 10, a drive shaft 53 for head seek which is composed of the lead screw.
Are arranged in the disc cassette insertion direction along the left side edge of the disc cassette 15 at the left side edge of the base 10. The drive shaft 53 is arranged near the rear end of the head arm 57 so as to be orthogonal to the head arm 57, as shown in the drawing.

FIG. 11 shows the drive shaft (lead screw).
53 is a partial vertical cross-sectional view showing the end bearing structure of 53. FIG. In addition,
Since the bearing structure of the drive shaft has substantially the same structure at both ends, only one end portion (rear end portion) shown in the figure will be described, and description of the other end portion will be omitted. In FIG. 11, a gear 66 to which the rotational force from the motor 51 is transmitted is fixed to a support shaft portion 65 of the drive shaft 53. A bearing holder 67 is fixed to the rear wall of the base 10 by screw fitting so that the axial position can be adjusted. That is, the rotation of the bearing holder 67 allows the drive shaft 53 to move back and forth, and the track position of the head 17 can be adjusted. The support shaft portion 65 of the drive shaft 53 projects rearward from the gear 66, and this projecting portion extends into the bearing holder 67. Further, a rear end (outside) of the bearing holder 67 is formed with a bearing chamber 68 having an open rear end, and the bearing chamber 68 can be sealed with a cap 69.

In FIG. 11, the sun ball 70 is brought into contact with the bearing seat surface formed at the tip end surface of the support shaft portion of the drive shaft 53, while the sun ball 70 is placed in the bearing chamber.
As shown in the drawing, a plurality of (for example, 3 to 6) planet balls 71 that come into contact with each other are arranged. These planet balls 71 are held by a casing 72 which surrounds them on the outside. Then, the cap 69 is fitted and fixed to the bearing holder 67 with these balls (one sun ball 70 and a plurality of planet balls 71) mounted (for example,
By press-fitting or fitting adhesion), a rotary bearing that supports both the radial load and the thrust load of the drive shaft 53 is configured. In the above embodiment, the lead screw (driving shaft) 53 is used as a transmission means for driving the head seek mechanism 18, but instead of the lead screw 53, a transmission means including a rack and pinion, a linear motor, or the like. May be used. Further, the output of the motor 51 may be transmitted to the drive shaft 53 by a belt or the like.

According to the embodiment described above, the disk as the recording medium is rotated and the head 17A,
By moving 17B in a predetermined direction on the disc, in the disc device for recording or reproducing information on the disc, the operating lever 34 pivotally supported on the base 10 is configured to swing, and Since the cassette guide 15 for guiding and holding the disc cassette 11 is moved to the loading position and the unloading position by swinging the operating lever 34, the cassette guide 15 is loaded with a compact and small number of parts. A disk device that can be moved to the unloading position and the unloading position and that can reduce the cost and the size and weight of the device can be obtained.

In addition to the above construction, the operating lever 34 is attached to the base 10 of the apparatus so as to be swingable about an axis 37 which is perpendicular to the insertion direction of the disk cassette 11, and The loading position and the unloading position of the cassette guide 15 are regulated by the engagement with the operation lever 34 and the engagement with the device base 10 via the center pin 42 and the roller portion 43 of the cassette guide 15. Therefore, it is possible to move the cassette guide 15 to the loading position and the unloading position with a structure that is more efficient, compact, and has a small number of parts, and it is possible to obtain a disk device that can reduce the cost and the size and weight of the device.

According to the embodiment described above, the drive shaft 53 for seek driving the head carriage 54 on which the recording / reproducing head 17B is mounted is provided with the disk cassette 1
Since the disk cassette 11 is arranged close to the side edge of the disk cassette 1 in the insertion direction of the disk cassette 11, the length and thickness of the disk apparatus can be easily reduced, and the disk apparatus can be made compact and lightweight. It was

In addition to the above structure, the drive shaft 53
Is disposed near the rear end of the head arm 57 carrying the head 17A in a direction orthogonal to the head arm 57, and the cassette guide 15 for guiding the disk cassette 11 includes the head arm 57. Notch 1 that avoids the area where the head seek mechanism 18 is arranged
6 is formed and the drive shaft 53 is formed by a lead screw, the length and thickness of the device can be reduced more easily and the size and weight of the disk device can be reduced. Became.

According to the embodiment described above, the notch 16 extending in the range of about 1/4 is provided on one side of the rear half of the cassette guide 15 for guiding the disc cassette 11, and the region of the notch 16 is provided. Since the head seek mechanism 18 is provided, the length and thickness of the device can be reduced, and a disk device that can be made compact and lightweight can be obtained.

In addition to the above construction, when the cassette guide 15 is in the unload position (raised position), the height of the upper surface of the head arm 57 and the height of the upper surface of the cassette guide 15 are made substantially the same, and the cassette is Since the notch 16 for arranging the head arm 57 is provided in the left or right approximately one-quarter range of the rear portion of the guide 15,
A disk device that can more efficiently reduce the length and thickness of the device and can reduce the size and weight of the device has been obtained.

According to the embodiment described above, the lateral position of the cassette guide 15 for guiding the disc cassette 11 is moved to the one side from the center of the apparatus,
A cassette loading mechanism 33 for forming a space corresponding to the other side of the apparatus, and moving the cassette guide to a loading position and an unloading position in the space,
Since the head seek mechanism 18 for seek-moving the heads 17A and 17B is arranged, the length, width and thickness of the device can be reduced, and a disk device that can be made compact and lightweight can be provided. Was obtained.

In addition to the above construction, the cassette loading mechanism 33 and the head seek mechanism 18 are arranged side by side in the insertion direction of the disc cassette 11, and
Since the latch mechanism 22 for releasing and restraining the cassette guide 15 is provided on the opposite side of the cassette loading mechanism 33 and the head seek mechanism 18, the length, width and thickness of the apparatus can be reduced more efficiently. As a result, a disk device that can be made smaller and can be made smaller and lighter was obtained.

[0045]

As is clear from the above description, according to the present invention, information is recorded on or reproduced from the disc by rotating the disc as a recording medium and moving the head in a predetermined direction. In the disk apparatus to be performed, the drive shaft for moving the head is arranged in the insertion direction of the disk cassette in the vicinity of the side edge of the disk cassette, so that the length and thickness of the apparatus are reduced. (EN) Provided is a disk device that can be made compact and lightweight.

According to another aspect of the present invention, in addition to the above configuration,
The drive shaft is arranged in the vicinity of a rear end of a head arm on which a head is mounted and orthogonal to the head arm, and a region where the head arm is arranged in a cassette guide for guiding the disk cassette. Since the notch is provided to avoid the above or the drive shaft is the lead screw, the disk device capable of achieving the above effect more efficiently is provided.

[Brief description of drawings]

FIG. 1 is a plan view showing an unloaded state of an embodiment of a disk device to which the present invention is applied, with a cover removed.

FIG. 2 is a plan view showing a state when the disk device of FIG. 1 is loaded, with a cover removed.

FIG. 3 is a front view taken along line 3-3 in FIG.

FIG. 4 is a rear view taken along line 4-4 in FIG.

5A and 5B are views showing the configuration on the bottom surface of the base of the disk device of FIG. 1, in which FIG. 5A is a plan view, FIG. 5B is a front view seen from a line BB in FIG. ) Is a side view seen from line C-C in (A).

FIG. 6 is a partial side view showing a state when the button lever in FIG. 1 is unloaded.

FIG. 7 is a partial side view showing a state when the operation lever and the cassette guide in FIG. 1 are unloaded.

FIG. 8 is a partial side view showing a state when the button lever in FIG. 2 is loaded.

FIG. 9 is a partial side view showing a state when the operating lever and the cassette guide in FIG. 2 are loaded.

10 is a longitudinal cross-sectional view of a portion of the head seek mechanism taken along the line 10-10 in FIG.

11 is a partial vertical cross-sectional view showing the bearing structure of the drive shaft of the head seek mechanism in FIG.

[Explanation of symbols]

 10 base 11 disc cassette 12 cassette insertion slot 13 front panel 14 eject button 15 cassette guide 16 notch (cassette guide) 17A upper head 17B lower head 18 head seek mechanism 19 shutter 20 vertical axis 21 shutter lever 22 latch lever 23 pin (shutter lever) 25 spring (shutter lever) 27 latch spring 28 stopper 30 pin (latch lever) 31 disk drive motor 32 circuit board 33 cassette loading mechanism 34 actuating lever 35 return spring (button lever) 36 button lever 37 Support point (rotation center of operating lever) 38 Notch (button lever) 39 Pin (operating lever) 40 Cam groove (operating lever) 41 Step-like holding part (base 42 Center Pin (Cassette Guide) 43 Roller Section (Cassette Guide) 51 Head Driving Motor 53 Drive Shaft (Lead Screw) 54 Head Carriage 55 Guide Bar 57 Head Arm 58 Spring (Head Arm Energizing) 61 Bar (Head Arm) Lifting) 63 Cover (disk device) 65 Spindle part (drive shaft) 67 Bearing holder 68 Bearing chamber (bearing holder) 69 Cap 70 Sun ball 71 Planetary ball 81 Center shaft 82 Drive pin 83 Hub adsorbing magnet 84 Positioning pin 85 Positioning surface 86 Disc pressing protrusion 87 Spring member (for returning cassette guide)

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[Procedure amendment]

[Submission date] May 13, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

[Figure 9]

[Figure 10]

FIG. 11

Claims (4)

[Claims] 1. A drive shaft for moving the head in a disk device for recording or reproducing information on the disk by rotating the disk as a recording medium and moving the head in a predetermined direction. Is disposed in the insertion direction of the disc cassette in the vicinity of the side edge of the disc cassette. 2. The disk device according to claim 1, wherein the drive shaft is arranged in the vicinity of a rear end of a head arm on which a head is mounted and orthogonal to the head arm. 3. The disk device according to claim 1, wherein the cassette guide for guiding the disk cassette is provided with a notch so as to avoid an area where the head arm is arranged. 4. The disk device according to claim 1, wherein the drive shaft is a lead screw.