JPH04232645A - Disk device - Google Patents

Abstract

PURPOSE:To accurately control the position and turning extent of a shutter lever with a simple and small-sized constitution by forming a swelling-out section on a cassette guide and arranging the shutter lever through the space of the swelling section. CONSTITUTION:A swelling section 91 swelling out upward from the upper surface of a cassette guide 20 which guides the insertion, discharge, and unloading of a disk cassette 14 is provided on the upper surface of the guide 20. An opening 92 for passing through a shutter lever 82 which opens the shutter of the cassette 14 and is supported by a shaft 81 is formed in the section 91 and the lever 82 is passed through the section 91 from the opening 92. Since the shutter lever 82 is passed through the internal space of the swelling-out section, the position and turning extent of the shutter lever 82 can be accurately controlled with a simple and small-sized constitution.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc device for recording on or reproducing a disc, and more particularly, the present invention relates to a cassette guide having a function of guiding insertion, ejection, loading, and unloading of a disc cassette in the disc device. Regarding the arrangement structure of.

0002

2. Description of the Related Art The above-mentioned disk device is a device for recording or reproducing information on a disk-shaped recording medium such as a magnetic disk or a laser disk. The disk is rotated by the drive of 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 (seek) along the radial direction of the disk by a motor.

In the above-mentioned disk device, an insertion/ejection means for mounting and ejecting the disk, a disk rotation drive means for rotating the disk by a motor, and a head are placed on a base that supports each component, and the head is placed on a base that supports each component. head seek means for moving to the track position;
Head loading means for loading and unloading the head with respect to the disk, etc. 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 etc. via an interface.

[0004] Such disk devices are used as external storage devices for electronic devices such as personal computers and word processors, and although they may be configured as independent devices, they are generally incorporated into the main body of the electronic device. many. Furthermore, as electronic devices become smaller and more portable, there is a strong demand for the disk devices to be smaller, lighter, and thinner.

The insertion/ejection means for loading and ejecting the disk has a cassette guide having a guiding function for inserting, ejecting, loading, and unloading the disk cassette, and a cam portion for raising and lowering the cassette guide. , a slide plate that is movable in the front and rear directions, and a latch member that performs a disk cassette pushing function in accordance with the movement of the slide plate. Further, the disk device includes a cassette opening means that engages with and opens the shutter of the disk cassette when the disk cassette is inserted.

[0006]

By the way, as the cassette opening means, a shutter is rotatably supported by the cassette guide and has an engaging portion (such as an opening/closing pin) that can be engaged with the shutter of the disk cassette. Lever may be used. This shutter lever must properly and stably engage the shutter of the inserted disk cassette.

However, in conventional disk devices,
The members for regulating the vertical movement of the shutter lever or the members for regulating the rotational range of the shutter lever were each made of separate members, resulting in a large number of parts and a complex structure. However, there were problems that needed to be solved, such as an increase in the number of processing steps and a difficulty in making the disk device more compact.

The present invention has been made in view of these technical problems, and an object of the present invention is to accurately regulate the position and rotation range of the shutter lever with a simple and compact configuration. The purpose is to provide a structure for a disk device.

[0009]

[Means for Solving the Problems] The present invention provides a disc device that performs recording or reproduction on or from a disc by rotating the disc as a recording medium and moving a head in a predetermined direction. A bulge is formed in the cassette guide that has guiding functions for ejecting, loading, and unloading, and a shutter lever for opening the shutter of the disc cassette is disposed through the inner space of the bulge, making it simple and compact. The present invention provides a disk device in which the position and rotation range of a shutter lever can be precisely regulated by the configuration.

In such a configuration, a guide surface for a lifter portion of the head arm to which the head is mounted is formed on the upper surface of the bulge, and an end surface of the bulge is formed in the forward direction of the shutter lever. By forming a bead part on the shutter lever as a stopper to regulate the vertical clearance with the bulging part, various functions can be given to the cassette guide, and the number of parts and space can be reduced. Effective utilization can be further promoted.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each of the following drawings, all the same reference numerals indicate the same or corresponding parts. First, Figure 1
The overall structure of an example of a disk device suitable for applying the present invention will be described with reference to FIGS. 1 is a plan view of the disk device, FIG. 2 is a right side view taken from line 2-2 in FIG. 1, and FIG. 3 is a front view taken from line 3-3 in FIG.

1 to 3, each component is housed in a box-shaped base 10 with an open top, and a reinforcing member 17 is attached to the open portion (upper end) of the base 10. , the cover 12 is attached from above the reinforcing member 17. The reinforcing member 17 has bent portions (
It is fixed to the base 10 by engaging with the side wall of the base 10 and screwing it to the side wall of the base 10, and has the function of maintaining the rigidity of the base 10. The cover 12 is also attached to the base 10 by engaging the bent portions on both sides with the side walls of the base 10. The base 10 and the reinforcing member 17 are made of a metal plate such as aluminum, and the cover 12
is for magnetic shielding and dustproofing, and is made of a thin plate of non-magnetic material such as aluminum. Attached to the front surface of the base 10 is a front panel 16 in which a cassette insertion opening 15 for inserting and ejecting a disk cassette 14 is formed.

FIG. 4 is a plan view of the disk device shown in FIG. 1 with the cover and reinforcing member 17 removed. In FIG. 4, a cassette guide 20 is provided in the base 10 for guiding the insertion and ejection of the disk cassette 14 into the apparatus and the loading and unloading of the disk cassette 14 onto the disk.
It is mounted so that it can be raised and lowered relative to 0. FIG. 5 shows the base 10 and cassette guide 20 along line 5-5 in FIG.
FIG. 6 is a partial side view taken along line 6--6 in FIG. 4.

In FIGS. 4 to 6, the cassette guide 20
has a shape that guides and holds the disk cassette 14, and guide pins 21 are provided on both sides thereof. On the other hand, a vertical groove 22 into which a guide pin 21 of a cassette guide 20 is slidably fitted is formed on both side surfaces of the base 10, and the cassette guide 20 extends vertically within a predetermined range along the vertical groove 22. It is attached so that it can be moved. A disk (magnetic disk, etc.) as a recording medium is housed inside the disk cassette 14. The recording medium can be accessed from the outside by opening a slideable shutter (47 in FIG. 8) provided on the disk cassette to load heads 69 and 70 (FIG. 15), which will be described later.

In FIG. 4, a shutter lever 82 is swingably supported on a vertical shaft 81 provided on the cassette guide 20. As shown in FIG. This shutter lever 82 is for opening and closing the shutter 47 (FIG. 8) of the disk cassette 14 in conjunction with the insertion of the disk cassette 14, and has a lower end portion that engages with the edge of the shutter 47. A removable shutter pin 83 is provided protrudingly. Further, the shutter lever 82 is connected to the cassette guide 2
0, and is biased clockwise in FIG. 4 by a spring 84 stretched between the cassette and the cassette, and can swing between the cassette non-inserted state shown by the solid line and the cassette inserted state shown by the two-dot chain line. can. A stopper 85 is formed on the cassette guide 20 for regulating the position of the shutter lever 82 when the cassette is not inserted, and a stopper 85 is formed on the shutter lever 82 for regulating the position when the cassette is inserted (shutter open position). A stopper 86 is provided.

FIG. 7 is a plan view showing a state in which the cassette guide 20 is removed from the disk device shown in FIG. In FIG. 7, a slide plate 23 is attached to the lower side of the cassette guide 20. The slide plate 23 has a cam portion for regulating the lateral position of the cassette guide and for raising and lowering the cassette guide. The cam portions are formed on rising portions 27 on both sides of the slide plate 23 (two on the left and two on the left). The slide plate 23 is mounted inside the base 10 so as to be slidable within a predetermined range in the front and rear directions.

A disk-shaped disk drive motor 24, which will be described later, is mounted approximately in the center of the bottom surface of the base 10, and the slide plate 23 has a notch in the center so as to avoid the disk drive motor 24. It has a similar shape. Further, the slide plate 23 has its lower surface supported by a plurality of (for example, four) protrusions (not shown) formed on the base 10, and further has long projections (not shown) formed on the left and right sides of the slide plate. hole 29,
By engaging with a headed pin 30 fixed to the base 10, it is prevented from moving upward and is mounted so as to be movable (slide) within a predetermined range in the front and rear directions. The slide plate 23 is always urged forward (toward the front panel 16) by a tension spring 25 stretched between the slide plate 23 and the base 10. On the other hand, the slide plate 23
can be engaged with the latch member 26 described later, and the engagement (
In the latched state, it is held at the rear position (the position shown in FIG. 7) against the tension spring 25.

As shown in FIGS. 4 and 7, rising portions 27 are formed at the front and rear sides of both sides of the slide plate 23 (four locations in total) for regulating the left and right positions of the cassette guide 20. . Each rising portion 27 is provided with a slide plate 2 for raising and lowering the cassette guide 20, and a slide plate 2 according to the vertical position of the cassette guide.
A cam portion (cam groove) 65 (FIG. 13, FIG. 14) having a function of determining the forward position of 3 (a kind of stopper) is formed. The lowering position of the cassette guide 20 is regulated by the height of the disk (specifically, the boss portion thereof) magnetically attracted to the rotor of the disk drive motor 24 and the upper surface of the headed pin 30. Cam pins 28 (FIG. 4) that engage with the respective cam portions (cam grooves) 65 of the slide plate 23 are provided at the front and rear portions of both sides of the cassette guide 20 (four locations in total).

In this way, the cam portion 65 and the cam pin 28
When the slide plate 23 is in the rear position, the cassette guide 20 is held in the raised position (FIG. 13), and the latch member 26 is released and the slide plate is moved forward by the tension spring 25. Then,
Lower the cassette guide 20 to the disc loading position (
It is configured as shown in Fig. 14). When ejecting the disk cassette 14 set in the disk device, press the eject button 3 attached to the slide plate 23.
1 from above the front panel 16, the slide plate is moved to the rear position, the latch member 26 is rotated back by the spring force, and the disk cassette 14 is ejected forward by the rotational force.

4 and 7, a head seek means (head moving means) 33 is provided within the base 10. As shown in FIG. This head seek means 33 is for moving a head unit 32 (FIG. 4) having a recording/reproducing head to an arbitrary track position along the radial direction of the disk positioned and mounted on the drive motor 24. It is a mechanism. Note that head loading means for loading and unloading the head onto and from the disk is provided within the head unit 32, as will be described later. Therefore, the head seek means 33 includes a motor (for example, a stepping motor) 34 as a driving source,
a screw shaft 35 for converting rotation of the motor into radial movement of the head unit 32;
Guide bar 3 for accurately guiding the radial movement of 2
6, etc., and each of these components is attached to a predetermined position on the base 10.

FIG. 8 is a partial plan view showing the main parts before the disk cassette is installed (latch member engaged state = latched state), and FIG. 9 is a partial plan view showing the main part before the disk cassette is installed (latch member released state = latched state). 10 is a plan view showing the same part as in FIG. 9, and FIG. 10 is a side view of FIG. Next, the operations of the slide plate 23 and the latch member 26 will be described in detail with reference to FIGS. 8 to 10.

The latch member 26 is rotatably mounted around a vertical pin 41 provided on the base 10, and is operated by an ejector spring 42 engaged with the latch member and the base. It is constantly biased clockwise. This latch member 26 is formed with a partially arcuate engagement edge 43 and a slide edge (or stopper edge) 44 that extends approximately in the front-rear direction in the unlatched state (FIG. 9). In the latched state shown in FIG. 8, the engaging portion (falling portion) 45 formed on the slide plate 23 is engaged with the engaging edge 43, and the slide plate is held at the rear position against the tension spring 25. ing.

The latch member 26 is also provided with a push-out arm 46 that comes into contact with the front end of the disk cassette 14. The push-out arm 46 functions as an ejector that pushes out the disk cassette 14 by receiving the biasing force of the ejector spring 42 when ejecting the cassette. In the latched state of FIG. 8, when the disk cassette 14 is inserted (in the direction of arrow B), the front end of the cassette comes into contact with the push-out arm 46, and as the cassette is pushed in, the latch member 26 is rotated in the direction of arrow A. When the final position is reached, the engaging edge 43 disengages from the engaging portion 45 of the slide plate 23 and becomes unlatched, and the slide plate 23 is moved in the direction of arrow C by the tension spring 25 to attach the cassette as shown in FIG. state (unlatched state).

Insertion of the disk cassette 14 (arrow B
direction), the shutter 47 is also opened at the same time. That is, although the shutter 47 is biased in the closing direction by a spring force, the shutter pin 83 of the shutter lever 82 engages with the edge of the shutter 47 at the same time as the disk cassette 14 is inserted (the state shown in FIG. 8). As the disk cassette 14 moves forward, the shutter lever 82 moves in a circular arc to the left, so that the shutter 47 opens against the spring force, and in the cassette mounted state shown in FIG. 9, the shutter 47 is in an open state. Become. In this shutter open state, head loading, which will be described later, is possible, and the head (not shown) is connected to the disk (not shown) as a recording medium.
By pressing (or approaching) the disc (not shown), recording or reproduction becomes possible.

Thus, in the cut attachment state, the latch member 26 is held in the position shown in FIG. 9 by the contact between the engaging portion 45 of the slide plate 23 and the slide edge 44 (rotation direction stopper), and in this state Then, the cassette guide 20 is lowered and set so as to be drivable on the drive motor 24, and the head (described later) is brought into contact with the open recording medium (disk), and is in a loaded state (a state in which recording and playback are possible). become.

On the other hand, when ejecting the disk cassette 14, when the eject button 31 (FIG. 7) is pressed and the slide plate 23 is pushed in the direction of arrow D (FIG. 9), the engaging portion 45 engages with the slide edge of the latch member 26. 44, the latch member 26 is rotated in the direction of arrow E (FIG. 9) by the ejector spring 42, and the disk cassette 14 is ejected forward by the forward force of the pushing arm 46 of the latch member 26. The shutter 47 of the disk cassette 14 is released from the shutter lever 82 at the same time as the cassette is ejected, and is automatically closed by the spring force. At the same time, the latch member 2
6 in the direction of arrow E, the engaging edge 43 of the latch member 26 engages with the engaging portion 45 of the slide plate 23, and the slide plate 23 is held at the rear position. Therefore, the cassette guide 20 is held in the raised position,
A head, which will be described later, is also held at a raised position (unload position) by the cassette guide 20.

FIG. 11 is a plan view of the motor 24 for rotationally driving the disk (recording medium) in the disk cassette 14, and FIG. 12 is a longitudinal sectional view taken along line 12--12 in FIG. As the motor 24 for driving the disk, a flat motor having circumferentially opposed type and outer circumferential rotors is used, and this motor is mounted on the base 10.

In FIGS. 11 and 12, 51 is a stator yoke fixed to the base 10 with screws 52, and on the stator yoke are a bearing housing 55 holding bearings 53, 54, a stator 56, a coil 57, etc. Fixed side components are installed. The bearing 5
A spindle shaft 58 is pivotally supported by 3 and 54,
The spindle shaft is provided with a disk-shaped outer rotor 60 via a flange 59, an adsorption magnet 61 for adsorbing a disk on the rotor, a disk drive pin 62 on the adsorption magnet, and a disc-shaped outer rotor 60 facing the stator 56. A driving magnet 6 fixed to the inner surface of the rotor 60
3, etc. are attached to the rotating side components.

The base 10 is also provided to prevent the rotor 60 from moving upward, and to prevent the disk cassette 14 from coming into contact with the rotor 60 of the drive motor 24 due to a bulge on the lower surface of the disk cassette when the disk cassette 14 is installed. Rotor slip-off prevention members 37, 38, and 39 are fixed with screws or the like to prevent the rotor from coming off. Alternatively, these rotor retaining members 37 and 38
, 39 can also be formed integrally with the base 10. When the disk cassette 14 is installed, a magnetic body (not shown) provided at the center of the disk is magnetically attracted to the attraction magnet 61, and an engagement hole (not shown) of the disk is aligned with the drive pin. By being fitted into the rotor 62, the disk (recording medium) is accurately positioned and attached to the rotor 60.

FIGS. 13 and 14 show the cassette guide 20.
13 is a side view showing the operation of the cassette guide. FIG. 13 shows a state in which the cassette guide is raised (a state in which the disk cassette 14 is not installed or is being inserted), and FIG. 14 shows a state in which the cassette guide is lowered (a state in which the disk cassette (when attached).

In FIGS. 13 and 14, a groove-shaped cam portion 65 is formed in each of the rising portions 27 provided on both sides of the slide plate 23. As shown in FIG. As shown in the figure, each cam groove 65 is composed of a horizontal groove on the front side (front panel side) and an inclined groove inclined rearward and downward from the horizontal groove. As described above, each cam groove 65 has cam pins 2 provided on both sides of the cassette guide 20.
8 is engaged. Note that the guide pins 21 provided at the center of both sides of the cassette guide 20 are connected to the base 10.
The cassette guide 20 is engaged with the vertical grooves 22 (indicated by two-dot chain lines) of a predetermined length formed on both sides of the cassette guide 20, and the cassette guide 20 is mounted so as to be movable (raised and lowered) only in the vertical direction.

Therefore, in the state shown in FIG. 13, when the disk cassette 14 is inserted into the cassette insertion slot 15 of the front panel 16 and pushed all the way in, the cassette's leading end latches, as explained in FIGS. 8 and 9. The member 26 is rotated clockwise against the ejector spring 42, and the engagement portion 45 of the slide plate 23 is separated from the engagement edge 43, causing the slide plate to engage the tension spring 2.
5 in the direction of arrow C (direction toward the front panel 16). For this reason, each of the cam pins 28
(4 locations in total) are moved downward by each cam groove (cam portion) 65, and the cassette guide 20 is lowered to the cassette mounting position shown in FIG.

In this case, since the lowering position of the cassette guide 20 is restricted and each cam groove 65 is engaged with each cam pin 28, the front stop position (FIG. 14) of the slide plate 23 is at the cam portion. 65 shape. Note that the reference numeral 66 in FIGS. 13 and 14 indicates the slide plates 23 provided at multiple locations on the base 10.
Showing protrusions for support.

When ejecting the disk cassette 14,
When the slide plate 23 is pushed backward, the engaging portion 45 engages with the slide edge (stopper edge) 4 of the latch member 26.
It's out of 4. Therefore, the latch member 26 is rotated counterclockwise by the urging force of the ejector spring 42, and its engagement edge 43 engages with the engagement portion 45, and the slide plate 23 is held at the rear position (push-in position). Ru. At this time, as the latch member 26 rotates counterclockwise, the push-out arm 46 causes the disk cassette 1 to
4 is pushed forward (ejected).

FIG. 15 shows the head unit 32 (FIG. 4).
FIG. In FIG. 15, the head unit 32 has a structure in which each component is mounted on a carriage 68. The carriage 68 also has an upper head 69 for recording and reproducing the upper track of the disk.
A lower head 70 for recording and reproducing information on the lower track of the disk is attached. head unit 32
(or the carriage 68) has a shape having a predetermined length in the radial direction, as shown, so that the heads 69 and 70 can perform recording and reproduction on each track. Therefore, the lower head 70 is attached to the leading end of the carriage 68.

On the other hand, the upper head 69
It is attached so that it can be raised and lowered. In the illustrated example, a head arm 72 is attached to the carriage 68 via a plate spring 71 so as to be movable up and down, and an upper head 69 is attached to the tip of the head arm. Upper head 6
9 and the lower head 70 are mounted at positions facing each other. The leaf spring 71 is fixed to the carriage 68 together with a support member 73 by a mounting screw 74.

A head arm 72 is attached to the support member 73.
By urging the head 69 toward the disk (downward), the head 69 is placed in a loaded state (in contact with or close to the disk,
A head loading spring 75 is attached to make the recording or playback possible. A head 69 indicated by a two-dot chain line indicates a loaded state of the head. Further, a lifter portion 76 is formed on the side surface (one side or both sides) of the head arm 72 for lifting (unloading) the head arm using the lifting of the cassette guide 20. In the illustrated example, the head arm 72 is vertically movably supported by a relatively long leaf spring 71, and a lifter portion 76 is provided at a position closer to the leaf spring 71 than the point of action of the head loading spring 75. When the head is raised (
When unloading), the head arm 72 is lowered (Figure 1).
5) in the counterclockwise direction), and the leaf spring 7
The neck bending action of 1 causes a head-down effect on the head arm 72, thereby reducing the height of the head arm 72 at its highest position.

Note that the dashed double-dashed lines 14A and 1 in FIG.
4B indicates the relative position of the disk cassette 14 in the radially inner and outer positions of the head unit 32. Further, a two-dot chain line 24A indicates the relative position of the disk drive motor 24 when the head unit 32 moves to the innermost position. By moving the carriage 68 in the radial direction by the motor 34, a head seek operation of the head unit 32 is performed.

FIG. 16 is a partial plan view showing the relationship between the head unit 32 and the head seek means with the head arm 72 and upper head 69 etc. removed in FIG.
7 is a cross-sectional view taken along line 17-17 in FIG. 16 and 17, the head seek motor (for example, stepping motor) 34 is connected to the base 10.
Both ends of the screw shaft 35, which is attached to the rear wall portion 10A and is an output shaft thereof, are attached to the rear wall portion 10A of the base 10.
and is rotatably supported by the rising portion 10B. Further, the guide bar 36 guides the seek (radial direction movement) of the carriage (head carriage) 68.
Both ends of the base 10 are supported in parallel to the radial direction by the rear wall portion 10A and another rising portion 10C of the base 10.

Therefore, the overhanging portion 77 of the carriage 68
A leaf spring 78 is attached to the lower surface of the carriage to be pressed against the screw shaft 35, and a needle pin 79 that extends laterally and engages with a screw groove on the lower side of the screw shaft 35 is attached to the carriage. Fixed. Therefore, when the screw shaft 35 is rotated by the motor 34,
The head unit 32 (
The carriage 68) moves in the radial direction of the disk, and a seek operation is performed to align the heads 69, 79 with arbitrary tracks. Further, two bearing portions 8 on the opposite side of the carriage 68 are provided with bearing portions 8 that are slidably fitted to the guide bar 36.
0 is provided, and during the seek operation, the head unit 3
It is constructed so that it can accurately guide the 2.

FIG. 18 is a partial plan view showing the main structure of an embodiment of a disk device according to the present invention, and FIG. 19 is a longitudinal sectional view taken along line 19--19 in FIG. Figure 18
19, a shutter lever 82 is pivotally supported on the upper surface of the cassette guide 20 so as to be able to swing about a shaft 81. A bulging portion 91 that bulges upward is higher than the upper surface 20a of the cassette guide 20. An opening 92 through which the shutter lever 82 passes is formed in this bulge 91 . Therefore, the shutter lever 82 is disposed through the opening 92 and into the bulge 91.

Further, the bulging portion 91 is formed around a notch 93 for receiving the head unit 32, and the bulging portion 91 is formed around the head arm 72 on which the upper head 69 is attached. It forms a guide surface for the lifter portion 76. That is, when ejecting the disk cassette 14, the head 69 is raised (unloaded) by the cassette guide 2.
In this case, the lifting operation of the lifter portion 76 (FIG. 15) of the head arm 72 is performed by the guide surface 94 of the bulged portion 91. In addition, even when the head 69 is unloaded, the head unit 3
2 is moved (seek), and the guide surface 94 also forms the sliding surface of the lifter portion 76 in that case.

The edge 95 of the opening 92 of the bulging portion 91 is
As shown by the two-dot chain line in FIG. 18, the shutter lever 8
The second stopper 86 is also used as a movement range regulating means that can be brought into contact with it. That is, the end surface of the bulging portion 91 is
It forms a stopper for the shutter lever 82 in the forward direction. Note that the shutter lever 82 has its stopper 96 connected to the cassette guide 2 as shown by the solid line in FIG.
By making it come into contact with the rising portion (stopper) 85 of 0, its retracted position (position at the time of cassette ejection) is regulated.

In FIGS. 18 and 19, the shutter lever 82 is provided with a bead (or rib) 97 to minimize the vertical clearance between the shutter lever 82 and the inner surface of the bulging portion 91.
is formed. If the vertical movement of the shutter lever 82 is large, there is a risk that the shutter pin 83 will come off the shutter 47, but by providing the bead 97, the gap with the bulge 91 can be easily regulated to a small size, and the shutter pin 83 can be easily regulated to a small size. By suppressing the vertical movement of the shutter pin 82, it is possible to reliably prevent the shutter pin 83 from coming off.

According to the embodiment described above, the bulge 91 is provided on the upper surface of the cassette guide 20 for storing and guiding the disk cassette 14, and the bulge 91 allows the lifter portion 76 of the head arm 72 to be moved. A guide surface is formed, and a shutter lever 82 for opening and closing the cassette shutter is disposed through the inside of the bulge 91 to suppress upward movement of the shutter lever.
Since the end edge 95 forms one stopper for regulating the swing range of the shutter lever 82, it is possible to provide the cassette guide 20 with various functions, and the number of parts is small, and the structure is simple and compact. It became possible to configure various disk devices.

[0046]

As is clear from the above description, according to the present invention, there is provided a disk device that performs recording or reproduction on a disk by rotating the disk as a recording medium and moving the head in a predetermined direction. Inserting, ejecting and loading disk cassettes,
A bulge is formed in the cassette guide that has an unloading guide function, and the shutter lever for opening the disk cassette shutter is disposed through the inner space of the bulge, resulting in a simple and compact structure. A disk device is provided that can accurately regulate the position and rotation range of a shutter lever.

According to another aspect of the present invention, in addition to the above configuration, a guide surface for a lifter portion of a head arm to which the head is mounted is formed on the upper surface of the bulge, and A stopper in the forward direction of the shutter lever is provided on the end face of the shutter lever, and a bead portion is formed on the shutter lever for regulating the vertical gap with the bulging portion, so that in addition to the above-mentioned effects, the cassette A disk device is provided in which the guide can be provided with various functions, and the number of parts can be reduced and space can be used more effectively.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a disk device suitable for applying the present invention.

FIG. 2 is a side view taken along line 2-2 in FIG. 1;

FIG. 3 is a front view taken from line 3-3 in FIG. 1;

FIG. 4 is a plan view of the disk device of FIG. 1 with the cover removed.

FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. 4.

FIG. 6 is a partial side view taken along line 6-6 in FIG. 4;

7 is a plan view of the disk device shown in FIG. 4 with the cassette guide removed; FIG.

8 is a partial plan view showing a latched state of the latch member in FIG. 7; FIG.

FIG. 9 is a partial plan view showing the latch member of FIG. 8 in an unlatched state.

10 is a side view taken along line 10-10 in FIG. 9. FIG.

11 is a plan view of the disk rotation drive motor in FIG. 7. FIG.

FIG. 12 is a longitudinal cross-sectional view taken along line 12-12 in FIG. 11;

13 is a side view showing the cassette guide in FIG. 4 when it is raised; FIG.

FIG. 14 is a side view showing a state in which the cassette guide is lowered from FIG. 13;

15 is a side view of the head unit in FIG. 4. FIG.

16 is a partially cutaway plan view showing the head seek means in FIG. 4 and the head unit in FIG. 15. FIG.

FIG. 17 is a cross-sectional view taken along line 17-17 in FIG. 16.

FIG. 18 is a plan view showing the configuration of main parts of an embodiment of a disk device according to the present invention.

19 is a longitudinal cross-sectional view taken along line 19-19 in FIG. 18. FIG.

[Explanation of symbols]

10 Base 12 Cover 14 Disk cassette 17 Reinforcement member 20 Cassette guide 21 Guide pin 23 Slide plate 24 Disk rotation drive motor 26
Latch member 28 Cam pin 32 Head unit 33 Head seek means 47 Shutter (disc cassette) 68
Head carriage 69 Head (upper side) 70 Head (lower side) 81 Vertical shaft 82 Shutter lever 83 Shutter pin 84 Spring (shutter) 85
Stopper 86 Stopper 91 Swelling portion 92 Opening 94 Guide surface 95 Edge (stopper) 97 Bead (rib)

Claims (4)

[Claims] 1. A disk device that performs recording or playback on a disk by rotating the disk as a recording medium and moving a head in a predetermined direction, in which a disk cassette is inserted, ejected, loaded, and unloaded. A disk device characterized in that a bulge is formed in a cassette guide having a guiding function, and a shutter lever for opening a shutter of the disk cassette is disposed through an internal space of the bulge. 2. The disk device according to claim 1, wherein a guide surface for a lifter portion of a head arm to which the head is mounted is formed on an upper surface of the bulge. 3. The disk device according to claim 1, wherein a stopper in the forward direction of the shutter lever is provided on an end surface of the bulging portion. 4. The disk device according to claim 1, wherein the shutter lever is formed with a bead portion for regulating a vertical clearance with the bulge portion.