JP2761682B2 - Disk unit - Google Patents

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 or from a disk, and more particularly to a cassette guide for guiding a disk cassette in the disk device and a head for moving the head. It relates to the structure and arrangement of a seek mechanism.

[0002]

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

In the above-mentioned disk device, an insertion / ejection means for mounting / discharging a disk cassette on a base for supporting each constituent member, 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 a head to and from a disk, and the like are provided. Further, a control circuit for controlling the entire disk device, a connector for power supply, and the like are provided, and the control circuit is connected to a host device or the like via an interface.

[0004] 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 constituted as an independent device. Many. Also, with the miniaturization and portableness of electronic devices, there is a strong demand for smaller and lighter and thinner disk devices.

The loading / unloading means for loading and unloading the disk (disk cassette) includes a cassette guide having a guide function of inserting, discharging, loading and unloading the disk cassette, and loading and unloading the cassette guide at a loading position and an unloading position. And a drive mechanism (loading mechanism) for moving the disc guide, and an eject mechanism for exerting a disc cassette pushing function according to the position of the cassette guide. In addition, the disk device includes a cassette opening unit that operates so as to engage with a shutter of the disk cassette and open the shutter when the disk cassette is inserted.

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

[0007]

In the conventional disk drive, the cassette guide has a shape for accommodating substantially the entire surface of the disk cassette, and a mechanism for moving the head (a head seek mechanism) is the same as the above. Since it is located behind the cassette guide (rear side of the device), the length of the device is increased and the thickness of the device is also increased.
There is a problem that it is difficult to reduce the size and weight of the device.

[0008] The present invention has been made in view of such technical problems, and an object of the present invention is to reduce the length and thickness of the apparatus and to reduce the size and weight of the apparatus. It is to provide a device.

[0009]

According to the present invention, in order to achieve the above-mentioned object, a disk as a recording medium is rotated and a head is moved in a predetermined direction to record or reproduce information on or from the disk. A first and second heads provided for recording or reproducing information on or from the disk, and a longitudinal direction formed in a direction perpendicular to a direction in which the disk cassette is inserted. A head carriage that holds the first head and is movable in the insertion direction of the disc cassette; and a head that has one end fixed to the head carriage and the other end holding the second head. An arm and a member for guiding and holding the disc cassette, the head carrier having the head arm fixed thereto. A cassette guide formed with a notch for movably accommodating the cartridge, and a notch arranged so that a longitudinal direction thereof is in the insertion direction of the disc cassette, and one end thereof is connected to the cassette guide. A head lift member that is engaged and lifts the head arm in conjunction with the raising operation of the cassette guide, and supports the head arm at an unload position.

According to another aspect of the present invention, in addition to the above structure, when the cassette guide is at the unload position, the height of the head arm upper surface and the height of the cassette guide upper surface are substantially the same. The above-mentioned object is achieved more efficiently by adopting a structure provided in the rear left or right side of the cassette guide in a range of about one quarter.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same reference numerals indicate the same or corresponding parts. 1 to 4
FIG. 1 is a diagram showing an embodiment of a disk drive 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 is a diagram showing an internal configuration at the time of loading of FIG. FIG. 3 is a plan view, FIG. 3 is a front view taken along line 3-3 in FIG.
FIG. 4 is a rear view as viewed from line 4-4 in FIG. 2.

In a box-shaped base 10 having an open top,
As shown in FIGS. 1 and 2, each component is stored. The base 10 is formed of a thin metal body such as aluminum, for example, and its upper surface is provided with a cover (not shown) made of a thin plate of nonmagnetic material such as aluminum for magnetic shielding and dust prevention. Covered. As shown in FIG. 3, a front panel 13 having a cassette insertion opening 12 for inserting and ejecting a disk cassette 11 is attached to a front surface of the base 10. At the left end of the front panel 13, a push button (eject button) 14 which is operated when the loaded disk cassette 11 is ejected is provided.

1 and 2, a base 10 has a disk cassette 11 inserted, ejected, and loaded.
A cassette guide 15 for guiding unloading is held movably up and down and back and forth. The cassette guide 15 is provided for the disc cassette 1 inserted from the front.
1 has a cross-sectional shape for guiding and holding, and in the illustrated example, a notch 16
Is provided. Further, the cassette guide 15 is mounted at a position shifted to the right side (rightward shift position) with respect to the base 10, and a space for disposing other components is formed on the left side of the base 10. ing.

In FIG. 1 and FIG. 2, the area of the notch 16 of the cassette guide 15 is
1 is provided with a head seek mechanism 18 having a head 17 for recording or reproducing information on or from a disk (information medium) in the disk drive 1. 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, etc.) as an information medium (media) 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 outside such as loading the head 17.

In FIGS. 1 and 2, a shutter shaft 21 and a latch lever 22 which can swing about the shaft above the cassette guide 15 are provided on a vertical shaft 20 provided at the right rear portion of the cassette guide 15. It is pivoted. The shutter lever 21 is connected to the disc cassette 1.
The shutter 19 in the head receiving opening of the disk cassette 11 is opened and closed in conjunction with the insertion of the disk cassette 1. A pin 23 that can be abutted on the edge is provided. The shutter lever 21 is urged in the counterclockwise (leftward) direction in the figure by a spring 25 stretched between the shutter lever 21 and the cassette guide 15. Further, a groove 26 having a predetermined length is formed on the upper surface of the cassette guide 15 along the movement locus of the pin 23 so as to allow the pin 23 to move.

1 and 2, the latch lever 22 is urged by a latch spring 27 in a counterclockwise (left-handed) direction in the figure, and in an unloaded state, as shown in FIG. The roller 29 provided at one end of the lever 22 is latched by a stopper 28 formed on the base 10 to be in a latched state. The other end of the latch lever 22 is provided with a pin 30 with which the leading end of the disc cassette 11 to be inserted can abut. In this manner, the space opposite to the notch 16 of the cassette guide 15, that is, the side where the head seek mechanism 18 and a cassette loading mechanism 33 described below are disposed (a space is formed by moving the cassette guide 15 and the disk cassette 11 together). On the other side of
A latch mechanism 22 is provided.

FIG. 5 is a view showing the mounting components on the bottom surface of the base 10 after removing the cassette loading mechanism and the head seek mechanism, and FIG. 5A is a plan view.
(B) is a front view as seen from line BB in (A), and (C) is a side view as seen from line CC in (A). 5, a disk-shaped flat motor 31 for driving a disk is mounted substantially at the center of the bottom surface of the base 10. The motor 31 has a central hole (not shown) of the disk cassette 11 and a central hole (not shown). A center shaft 81 to be fitted, a drive pin 82 to be engaged with a drive hole (not shown) provided near the center hole of the disk cassette 11, and a magnet 83 for holding a disk hub by suction are provided. I have.
A positioning pin 84 for positioning the disk cassette 11 in the loading state is provided behind the motor 31, and a positioning surface 85 formed by cutting and raising a part of the base 10 is provided near the insertion slot 12. Is provided. A circuit board 32 for controlling the disk device is joined to the periphery of the motor 31.

1 and 2, in a space formed on the left side of the cassette guide 15 in the base 10, a cassette loading mechanism 33 for moving the cassette guide 15 to a load position and an unload position.
Are arranged. An operating lever 34 extending across the upper side of the cassette guide 15 and pivotally supported at both ends by the base 10 is mounted on the base 10. Button lever 3 of the loading mechanism 33
6 is constantly urged in the direction of the insertion opening 12 by the return spring 35 and can move rearward against the return spring 35 by pressing the eject button 14. The swing position of the operating lever 34 is regulated by the button lever 36, and the cassette guide 1 is
5 for driving the load 5 to the load position and the unload position.

FIGS. 6 to 9 are partial side views showing the cassette loading mechanism 33 during unloading and loading. FIG. 6 shows the button lever 3 during unloading.
6, FIG. 7 shows the state of the operation lever 34 and the cassette guide 15 at the time of unloading, FIG. 8 shows the state of the button lever 36 at the time of loading, and FIG. 9 shows the state of the operation lever and the cassette guide 15 at the time of loading. The button lever 36
Is slidably supported in the front-rear direction with respect to the base 10 by a sliding guide portion including a pin and a long hole,
It is constantly urged leftward (forward) in the figure by a return spring 35. The operation lever 34 is pivotally supported at both ends thereof so as to be able to swing about a fulcrum 37 provided on the base 10. Therefore, a notch 38 formed in the button lever 36 and a pin 39 provided on one side of the operation lever 34 are provided.
Are engaged.

The cam groove 4 is provided on both sides of the operating lever 34.
0 is formed, and stepped holding portions 41 are provided on both sides of the base 10. On the other hand, the cassette guide 15
The center pin 42 slidably engaged with the cam groove 40 of the operating lever 34 and the holding portion 41 of the base 10
The roller portion 43 is provided in contact with the roller portion 43. Since the cassette guide 15 has a cut-out shape in the left half portion as shown in FIGS. 1 and 2, the holding portion 41 and the roller portion 43 have a total of one portion on the left side and two portions on the right and left sides. It is provided in three places.

Next, with reference to FIGS. 1 to 9, the operation of each unit when loading and unloading the disk cassette 11 will be described. Cassette insertion slot 12
When the disc cassette 11 is inserted from FIG.
1 and 2, the shutter lever 21 rotates clockwise (clockwise) in FIG. 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 disk cassette 11, and the shutter 19 is returned by the rotation of the shutter lever 21 (insertion of the disk cassette 11). By moving the head 17 (not shown), the head receiving port is opened, and the head 17 can access the disk (media).

Next, when the tip of the disk cassette 11 contacts the pin 30 of the latch lever 22 (FIGS. 1 and 2), and further presses the disk cassette 11 (in the insertion direction), the latch lever 22 is turned on the clock (see FIG. 1). The roller 29 of the latch lever 22 comes off the stopper 28 of the base 10. By releasing the latch, the cassette guide 15 constrained by the roller 29 can be moved rearward (to the right in FIG. 7) of the apparatus. The position of the disc cassette 11 in the forward direction in the cassette guide 15 is regulated by the pin 23, the leading end of which contacts the rear end of the groove 26 (FIG. 2).

When the disc cassette 11 is further pushed, the cassette guide 15 also moves to the rear of the apparatus. Therefore, the center pin 42 of the cassette guide 15 (FIG.
9) horizontally moves the cam groove 40 of the operating lever 34 rightward (backward of the apparatus) in the figure, and the urging force of the return spring 35 acts on the pin 39 of the operating lever 34 via the button lever 36. Then, the operating lever 34 is rotated, and the operating lever 34 is rotated clockwise (clockwise) from the position shown in FIG. At the same time, the roller portions 43 (three places) of the cassette guide 15 also move rearward along the horizontal portion 41b of the holding portion 41. Since the pin 39 moves to the left in the drawing by the rotation of the operation lever 34, the button lever 36 also moves in conjunction with it. When the disc cassette 11 is further pressed, 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 moved into the cassette loading state shown in FIG. (The disk cassette 11 is at the load position).

In the loading state in which the cassette guide 15 is lowered, the cassette guide 15 is brought into contact with the roller 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 position of is regulated. In this loading state, the disc cassette 11 is mounted on the positioning pins 8.
4 and the positioning surface 85, the cassette guide 15 is positioned in the mounted state.
4 is urged downward by the downward urging force. Therefore, the loading 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. Is done. Then, when the cassette guide 15 is at the load position, the disk in the disk cassette 11 (specifically,
The hub (the hub portion) is magnetically attracted onto the rotor of the disk drive motor 31 (FIG. 5) and engages with the center shaft 81 and the drive pin 82 on the rotor, thereby positioning the disk (media) (high). Direction, rotation direction). That is, the disc 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
9 is urged obliquely downward and leftward in FIG. 9 by the top end 40a of the upper surface of the cassette 10 so that the roller portion 43 of the cassette guide 15 is moved downward by the lower vertical portion 41c of the holding portion 41 of the base 10.
The front and rear positions are regulated by the
Holds the disk 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
(FIGS. 3 and 8), the button lever 36 is moved rearward against the return spring 35. When the button lever 36 moves backward, first, the engagement of the notch 38 of the button lever and the pin 39 of the operation lever 34 causes the operation lever 34 to rotate counterclockwise from the position shown in FIG. (Rotation) direction. Next, the center pin 42 is lifted by the cam groove 40, and the cassette guide 15 moves upward. When the eject button 14 is pressed further,
As the cassette guide 15 is raised, the roller portion 43 is disengaged from the lower holding portion (vertical portion) 41c, and the cassette guide 15 can be moved forward (to the left in FIG. 9).

When the eject button 14 is further depressed, the shutter lever 21 and the latch lever 22 are vigorously rotated counterclockwise (counterclockwise) by the urging forces of the respective return springs 25 and 27 (FIGS. 1 and 2). Then, the disc cassette 11 is ejected forward (ejected), and the cassette guide 15 is moved forward. At that time, an elastic member for urging the cassette guide 15 forward may be provided to assist the smooth movement of the cassette guide 15. In this embodiment, the operating lever 34 and the cassette guide 1
5, a spring member 87 (FIGS. 1 and 2) is attached. 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 a fixed side of the base 10 or the like or to 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 to apply a return force to the cassette guide 15. Thus, first, the cassette guide 15 is returned to the initial position in FIG. So, eject button 1
4 is stopped, the button lever 36 and the operating lever 34 are actuated by the urging force of the return spring 35 (FIGS. 6 and 8).
Is returned to the initial position (unload position) shown in FIGS.

As shown in FIGS. 1 and 2, a head seek mechanism 18 is provided in the area of the notch 16 of the cassette guide 15. FIG. 10 is a line 10-10 in FIG.
FIG. 5 is a vertical sectional view of a head seek mechanism 18 along the line.
Next, the head seek mechanism will be described with reference to these drawings. In the illustrated example, a notch 16 extending over a substantially quarter area is provided on the left side of the rear half of the cassette guide 15.
However, in some cases, a notch corresponding to this may be provided on the right side of the rear half. In that case, a mechanism corresponding to the head seek mechanism 18 is also provided in the area of the notch on the right side. Will be.

Referring to FIGS. 1, 2 and 10, the cassette loading mechanism 3 comprising the button lever 36 and the like is shown.
The disk cassette 11 is located on the side where the cassette 3 is disposed, that is, near the side edge of the space formed by moving the cassette guide 15 to one side (the right side in the illustrated example) (the left side in the illustrated example). The cassette loading mechanism 33 is arranged along the edge in the insertion direction of the disc cassette 11.
Further, 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 driving shaft 53 composed of a lead screw rotated by the motor 51 through a gear train 52, A head carriage 54 which engages with a lead groove of a shaft (lead screw) 53 and which can reciprocate by forward and reverse rotation of the drive shaft 53; and a guide bar 55 which fits with the head carriage 54 and guides the head carriage 54. A lower head 17B mounted on the distal end of the head carriage 54, a head arm 57 movably mounted on the head carriage 54 via a leaf spring 56, and a distal end of the head arm 57. 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.

At the tip of a support arm 59 pivotally supported by the base 10, a head lift (a head lift) extends under the head arm 57 and has the other end engaged with the upper surface of the cassette guide 15. Bar 61 for road)
Is attached. The support arm 59 is constantly 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 comes into 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 unloaded position.

As described above, the disk apparatus of this embodiment is configured so that the upper head 17A and the lower head 17B can be simultaneously loaded on the upper and lower surfaces of the medium (disk) in the disk cassette 11. Have been. FIG. 10 shows a state in which the cassette guide 15 and the heads 17A and 17B are at the unload position. In this state, the upper surface (the highest portion) of the cassette guide 15 and the upper surface (the highest portion) of the head arm 57 are shown.
Are arranged so as to have substantially the same height, that is, to be substantially coplanar. In the present embodiment, FIG.
As shown in FIG. 10, by setting the distance 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 unloaded state as small as possible, The height (thickness) is configured to be as small as possible.

In FIG. 1, FIG. 2 and FIG. 10, a drive shaft 53 for head seek comprising the lead screw is provided.
Are arranged along the left edge of the disk cassette 15 at the left edge of the base 10 in the disk cassette insertion direction. The drive shaft 53 is disposed near the rear end of the head arm 57 so as to be orthogonal to the head arm 57 as shown in the figure.

FIG. 11 shows the drive shaft (lead screw).
FIG. 53 is a partial longitudinal sectional view showing an end bearing structure of a 53. In addition,
Since the bearing structure of the drive shaft has substantially the same structure at both ends, only the illustrated one end (rear end) will be described, and the description of the other end 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, thereby enabling the track position of the head 17 to be adjusted. A support shaft portion 65 of the drive shaft 53 protrudes rearward from the gear 66, and the protruding portion extends into the bearing holder 67. Further, a bearing chamber 68 having an open rear end is formed on the rear side (outside) of the bearing holder 67, and the bearing chamber 68 can be sealed by a cap 69.

In FIG. 11, a sun ball 70 is in contact with a bearing seat surface formed on a tip end surface of a support shaft portion of the drive shaft 53, while the sun ball 70 is provided in the bearing chamber.
As shown, a plurality (for example, three to six) of planet balls 71 that are in contact with each other are provided. These planet balls 71 are held by a casing 72 surrounding their outside. Then, with these balls (one sun ball 70 and a plurality of planetary balls 71) mounted, the cap 69 is fitted and fixed to the bearing holder 67 (for example,
By press-fitting or fitting and bonding, 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 (drive shaft) 53 is used as the transmission means for driving the head seek mechanism 18. However, instead of this lead screw 53, a transmission means such as a rack and pinion or a linear motor is used. 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, while rotating a disk as a recording medium, the head 17A,
By moving 17B in a predetermined direction on the disk, in a disk device for recording or reproducing information on or from the disk, an operating lever 34 pivotally supported by the base 10 is configured to swing. 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 operation lever 34, the cassette guide 15 can be loaded in a compact configuration with a small number of parts. The disk device can be moved to the position and the unload position, and the cost and the size and weight of the device can be reduced.

Further, in addition to the above configuration, the operating lever 34 is mounted on the base 10 of the apparatus so as to be swingable about an axis 37 perpendicular to the direction in which the disc cassette 11 is inserted. The loading position and the unloading position of the cassette guide 15 are regulated by engagement with the operating lever 34 and engagement with the apparatus base 10 via the center pin 42 and the roller portion 43 of the cassette guide 15. Therefore, the cassette guide 15 can be moved to the loading position and the unloading position with a more efficient, compact, and reduced number of parts, and a disk device capable of reducing costs and reducing the size and weight of the device can be obtained.

According to the embodiment described above, the drive shaft 53 for performing seek drive of the head carriage 54 on which the recording / reproducing head 17B is mounted is connected to the disk cassette 1
1, the length and thickness of the device can be easily reduced, and the size and weight of the disk device can be reduced. Was.

In addition to the above configuration, the drive shaft 53
Is disposed in the direction perpendicular to the head arm 57 near the rear end of the head arm 57 on which the head 17A is mounted, and the cassette guide 15 for guiding the disk cassette 11 includes the head arm 57. Notch 1 to avoid area where head seek mechanism 18 is provided
6 and the drive shaft 53 is formed by a lead screw, so that the length and thickness of the device can be reduced more efficiently, and the size and weight of the disk device can be reduced. It became.

According to the above-described embodiment, a notch 16 extending approximately in a quarter is provided on one side of the rear half of the cassette guide 15 for guiding the disk cassette 11, and the notch 16 is provided in the area of the notch 16. 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 smaller and lighter can be obtained.

Further, in addition to the above configuration, when the cassette guide 15 is at the unload position (up 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, The notch 16 for arranging the head arm 57 is provided in the rear left or right side of the guide 15 in a substantially quarter area.
As a result, a disk device capable of reducing the length and thickness of the device more efficiently and reducing the size and weight of the device was obtained.

According to the embodiment described above, the position of the cassette guide 15 for guiding the disk cassette 11 in the left-right direction is shifted from the center of the apparatus to one side, whereby
A cassette loading mechanism 33 for forming a space corresponding to the other side of the apparatus, and for moving the cassette guide to the load position and the unload position in the space;
Since the head seek mechanism 18 for moving the heads 17A and 17B to seek is provided, the length, width and thickness of the disk drive can be reduced, and the disk drive can be reduced in size and weight. Obtained.

Further, in addition to the above configuration, the cassette loading mechanism 33 and the head seek mechanism 18 are arranged side by side in the insertion direction of the disk cassette 11, and
Since the latch mechanism 22 for releasing and restraining the cassette guide 15 is disposed 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 capable of reducing the size and weight of the device was obtained.

[0045]

As is apparent from the above description, according to the present invention, a disk as a recording medium is rotated and a head is moved in a predetermined direction to record or reproduce information on or from the disk. In a disk device for performing a recording operation, a first head and a second head provided for recording or reproducing information on or from the disk have a longitudinal direction perpendicular to a direction in which a disk cassette is inserted. A head carriage holding the first head and being movable in the direction of inserting the disk cassette, and a head arm having one end fixed to the head carriage and the other end holding a second head. And a head carrier for guiding and holding the disk cassette, wherein the head carrier has the head arm fixed thereto. A cassette guide formed with a notch for movably accommodating the cassette, and a cassette guide arranged at the notch so that a longitudinal direction thereof is in the insertion direction of the disc cassette, and one end of the cassette guide is connected to the cassette guide. And a head lift member that lifts the head arm in conjunction with the ascending operation of the cassette guide and supports the head arm at an unloading position. Since a head carriage having a longitudinal direction in a direction perpendicular to the disk cassette insertion direction is disposed movably in the disk cassette insertion direction, the length of the apparatus can be reduced, and the head arm can be unloaded. Since the head lift member to be supported at the position is arranged in the notch, the thickness of the apparatus can be reduced. It can be, thereby, the disk device is provided which can be reduced in size and weight of the device.

According to another aspect of the present invention, in addition to the above structure,
When the cassette guide is at the unloading position, the height of the head arm upper surface and the height of the cassette guide upper surface are made substantially the same, or the notch is set to approximately one quarter of the left or right side of the rear of the cassette guide. Since the configuration is provided in the range, a disk device capable of achieving the above effects more efficiently is provided.

[Brief description of the drawings]

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

FIG. 2 is a plan view showing a state where 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. 2;

FIG. 4 is a rear view taken along line 4-4 in FIG. 2;

5A and 5B are diagrams showing a configuration on the bottom surface of the base of the disk device of FIG. 1, wherein FIG. 5A is a plan view, FIG. 5B is a front view as seen from line BB in FIG. () Is a side view seen from line CC 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 operation lever and the cassette guide in FIG. 2 are loaded.

FIG. 10 is a vertical sectional view of a portion of the head seek mechanism taken along line 10-10 in FIG. 1;

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

[Explanation of symbols]

 DESCRIPTION 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 Operating Lever 35 Return Spring (Button Lever) 36 Button Lever 37 Support point (rotation center of operation lever) 38 Notch (button lever) 39 Pin (operation lever) 40 Cam groove (operation lever) 41 Stair-shaped holding part (base) 42 Center pin (cassette guide) 43 Roller part (cassette guide) 51 Head driving motor 53 Drive shaft (lead screw) 54 Head carriage 55 Guide bar 57 Head arm 58 Spring (for biasing head arm) 61 Bar (Head arm) Lifting) 63 Cover (disk device) 65 Support shaft part (drive shaft) 67 Bearing holder 68 Bearing room (bearing holder) 69 Cap 70 Sun ball 71 Planetary ball 81 Center shaft 82 Drive pin 83 Hub adsorption magnet 84 Positioning pin 85 Positioning surface 86 Disc pressing projection 87 Spring member (for returning the cassette guide)

Claims (3)

(57) [Claims] 1. A disk device for recording or reproducing information on or from a disk by rotating a disk as a recording medium and moving a head in a predetermined direction. A first head and a second head provided for performing reproduction, a longitudinal direction formed in a direction perpendicular to the insertion direction of the disk cassette, and holding the first head to hold the first head; A head carriage movably provided in the insertion direction, a head arm having one end fixed to the head carriage and a second head held at the other end, and a member for guiding and holding the disk cassette. Notch for movably accommodating the head carriage to which the head arm is fixed. And the cassette guide is arranged in the notch so that the longitudinal direction thereof is in the insertion direction of the disc cassette, and one end thereof is engaged with the cassette guide to interlock with the ascending operation of the cassette guide. A head lift member that lifts a head arm and supports the head arm at an unload position. 2. The disk device according to claim 1, wherein the upper surface of the head arm and the upper surface of the cassette guide have substantially the same height when the cassette guide is at the unload position. 3. The disk device according to claim 1, wherein the notch is provided in a substantially quarter area on the left or right side of the rear portion of the cassette guide.