JPH0482063A - Disk device - Google Patents

Abstract

PURPOSE:To miniaturize a device by attaching a head to an arm which is so supported through an elastic member or part that it can rise and fall and providing a stopper, which stops downward deformation of the elastic member or part, under the elastic member or part. CONSTITUTION:An upper head 69 for recording and reproducing on tracks on the upper face of the disk and a lower head 70 for recording and reproducing of tracks on the lower face of the disk are attached to a carriage 68. The carriage 68 is provided with a projecting part (stopper) 82 which is brought into contact with the lower face of a flat spring 71 with heads loaded. That is, heads 69 and 70 are attached to the arm 72 which is so supported through the elastic member or part 71 that the arm can rise and fall, and the stopper 82 to stop downward deformation of the elastic member or part 71 is provided under the elastic member or part 71. Thus, the overall height (thickness) of the device is reduced to make the device thin and small-sized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk device that records or reproduces information on a disk. This invention relates to the structure of a head loading means for raising and lowering.

[Conventional technology]

The above-mentioned disk device is a device that records or reproduces information on a disk-shaped recording medium such as a magnetic disk or a laser disk.A disk serving as the recording medium is inserted and ejected, and is driven by a motor. It is configured to perform recording or reproduction while rotating the disk and moving the head 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.

The disk device includes an insertion/ejection means for mounting and ejecting a disk on a base that supports each component;
A disk rotation drive means for rotating the disk by a motor, a head seek means for moving the head to an arbitrary track position along the radial direction of the disk, a helad load means for loading and unloading the head with respect to the disk, etc. It is provided.

Further, a control circuit for controlling the entire disk device, a power supply connection adapter, etc. are provided, and the control circuit is connected to a host device etc. via an interface.

Such disk devices are used as external storage devices for electronic devices such as personal computers and word processing sensors, and although they may be configured as independent devices, they are generally built into the main body of the electronic device. .

Furthermore, as electronic devices become smaller and more portable, there is a strong demand for the disk devices to be smaller, lighter, and thinner.

By the way, the insertion/ejection means for loading and ejecting a disk includes a cassette guide having a guiding function for inserting, ejecting, loading, and unloading the disk cassette;
The slide plate includes a cam portion for raising and lowering the cassette guide.

The head loading means for loading and unloading the head with respect to the disk includes a head holding arm attached to a fulcrum provided on the head seek carriage so as to be rotatable in the vertical direction, and a head loading spring. Attach the arm to the disc side! I (loading), and the arm is configured to rotate upward (unloading) by utilizing the rise of the cassette guide.

[Technical Problems to be Solved by the Invention] In a conventional head loading means for a disk device, the head is attached to an arm member that is rotatable about a fulcrum on a carriage.

Therefore, when unloading the head, such as when ejecting a cassette, the arm member rises upward in a substantially straight line from the fulcrum at a constant angle, and the upper end of the head unit including the arm member becomes higher. In order to avoid contact with the disk device, it is necessary to increase the internal height of the device, which poses a technical problem in that the thickness (height) of the disk device becomes correspondingly large.

The present invention has been made in view of these technical problems, and it is possible to suppress the height of the highest part of the head unit when the head is raised by a certain amount, thereby reducing the overall height (thickness) of the device. An object of the present invention is to provide a disk device that can be downsized by reducing the size of the disk drive.

[Means for Solving the Problems] The present invention provides a disc device that records or reproduces information on or from a disc by rotating the disc as a recording medium and moving a head on a carriage in a predetermined direction. , the head is attached to an arm that is demonstrably supported via an elastic member or an elastic section, and a device is provided below the elastic member or the elastic section to prevent downward deformation of the elastic member or the elastic section. By adopting a configuration with a stopper, the height of the highest part of the head unit can be kept low when the head is raised by a certain amount, and the overall height (thickness) of the device can be reduced accordingly.
The present invention provides a disk device that can be downsized by reducing the amount of noise.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings. In each of the following drawings, the same reference numerals indicate the same or corresponding parts.

First, the overall structure of an example of a disk device suitable for applying the present invention will be described with reference to FIGS. 1 to 17.

Figure 1 is a plan view of the disk device, Figure 2 is the right side as seen from line ■-■ in Figure 1, and Figure 3 is the front as seen from *m-m in Figure 1. It is a diagram.

In FIGS. 1 to 3, each component is housed in a box-shaped base 10 with an open top surface, and the base l
A cover 12 is attached to the upper surface of O.

Furthermore, a front panel 16 is attached to the front surface of the base 10, in which a cassette insertion opening I5 is formed into which a disk cassette 14 is inserted and ejected.

The base 10 is formed of a thin and small casing made of metal such as aluminum, and the cover 12 is for magnetic shielding and dustproofing, and is made of a thin non-magnetic material such as aluminum. It is formed from a plate-shaped member.

Incidentally, protrusions 17 are formed at the front and back on both sides of the base 10, and notches 18 are formed at the front and back on both sides of the cover 12, and the cover 12 has each protrusion 17 engaged with each notch 18. Positioning is fixed.

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

In FIG. 4, inside the base 10, the insertion and ejection of the disk cassette 14 into the device and the loading of the disk into the device are carried out.
A cassette guide 20 for guiding unloading is attached to the base 10 so as to be movable up and down.

5 is a cross-sectional view of the base 10 and the cassette guide 20 taken along the line -V in FIG. 4, and FIG. 6 is a partial side view taken along the line Vl--Vl in FIG. 4. It is.

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 of the cassette guide 20.

On the other hand, vertical grooves 22 are formed on both sides of the base 10, into which the guide pins 21 of the cassette guide 20 are slidably fitted.
It is mounted so that it can move within a predetermined range in the vertical direction along the .

Inside the disk cassette 14, a disk (such as an I-type disk) as a recording medium is stored so as to be accessible from the outside.

Figure 7 shows the cassette guide 2 from the disk device in Figure 4.
It is a top view which shows the state which removed 0.

In FIG. 7, a cam portion is formed on the lower side of the cassette guide 20 to regulate the left-right position of the cassette guide and to raise and lower the cassette guide.
A slide plate 23 having a rising portion 27 is attached.

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 at the center of the bottom surface of the base 10, and the slide plate 23 is attached to the disk drive motor 24, which will be described later.
It has a shape with a notch in the center so as to avoid 4.

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, base 10
By engaging the headed pin 30 fixed to the
It is installed so that it can be moved (slided) within a predetermined range in the front and rear directions, while being prevented from moving upward.

The slide plate 23 is moved forward (front panel 1) by a tension spring 25 stretched between it and the base 10.
6) is always energized.

On the other hand, the slide plate 23 can be engaged with a latch member 26, which will be described later, and in the engaged (latched) state 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 for regulating the left and right positions of the cassette guide 20 are formed at the front and rear sides of both sides of the slide plate 23 (four locations in total).

Each rising portion 27 has a cam portion (cam groove) 65 (a type of stopper) that has the function of raising and lowering the cassette guide 20 and determining the forward position of the slide plate 23 according to the vertical position of the cassette guide. 13th
14) are 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.

Front and rear of both sides of this cassette guide 20 (4 locations in total)
, each of the cam portions (cam grooves) of the slide plate 23
A cam pin 28 (FIG. 4) is provided which engages 65.

In this way, when the slide plate 23 is in the rear position due to the engagement between the cam portion 65 and the cam pin 28,
The cassette guide 20 is held in the raised position (Fig. 13).
, When the launch member 26 is released and the slide plate is moved forward by the tension spring 25, the cassette guide 20 is lowered to the disk mounting position (FIG. 14).
It is configured as follows.

When ejecting the disk cassette 14 loaded into the disk device, the eject button 31 attached to the slide plate 23 is pushed in from above the front disk drive ring 16, and 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 trunk position along the radial direction of the disk positioned and mounted on the drive motor 24. This is the 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 spacing seek means 33 includes a motor (for example, a stepping motor) 34 as a driving source, a screw shaft 35 for converting the rotation of the motor into radial movement of the head unit 32, and a radial movement of the head unit 32. a guide bar 36 for accurately guiding the
Each of these components is based on base 1.
0 at a predetermined position.

FIG. 8 is a partial plan view showing the main part before the disk cassette is installed (latch member engaged state - latch shape! a), and FIG.
This figure is a plan view showing the same part as FIG. 8 when the disk cassette is installed (latch member released state=latch released), and FIG. 10 is a side view of FIG. 9.

Next, referring to FIGS. 8 to 10, slide plate 2
3 and the operations of the latch member 26 will be described in detail.

The latch member 26 is rotatably mounted around a vertical pin 41 provided on the base 10, and is rotated counterclockwise in FIG. 8 by an ejector spring 42 engaged with the latch member and the base. It is constantly biased in the direction.

This latch member 26 includes an arcuate engagement edge 43 and a slide edge (
or a stopper edge) 44 is formed.

In the latched state shown in FIG. 8, a retaining portion (falling portion) 45 formed on the slide plate 23 is engaged with the engagement edge 43, and the slide plate is held in the rear position against the tension spring 25. has been done.

The launch member 26 also includes a disk cassette 14.
A push-out arm 46 is provided which abuts the front end of the.

The pushing arm 46 functions as an ejector that pushes out the disk cassette 14 when ejecting the cassette, but when inserting the cassette, it functions as a cassette opening member that opens the shutter 47 of the disk cassette 14, as shown in FIG. .

In the latched state shown in 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 the pushing of the cassette causes the latch member 26 to rotate in the direction of arrow A. When the final position is reached, the engaging edge 43 separates from the retaining 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, as shown in FIG. The cassette is in the installed state a (unlatched state n).

At this time, the latch member 26 is held in the position shown in FIG. 9 by the contact between the retaining portion 45 of the slide plate 23 and the slide edge 44 (rotation direction stopper), and in this state, the latch member 26 is held in the position shown in FIG. By the push-out arm 46,
The shutter 47 of the disk cassette 14 is opened to the left in FIG. 8 against the spring force, and the disk cassette is in the open position II (recordable and reproducible position L!i).

On the other hand, when ejecting the disk cassette 14, press the eject button 31 (FIG. 7) and push the slide plate 23 in the direction of the arrow (FIG. 9). , the latch member 26 is rotated in the direction of arrow E (FIG. 9) by the ejector spring 42, and the ejector arm 4
The disk cassette 14 that is in contact with the disk cassette 6 is ejected forward by the rotating force at that time.

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 the line X--X in FIG. be.

As the motor 24 for driving the disk, a flat motor with a circumferentially opposed type and an outer circumferential rotor is used.
The motor is mounted on the base 10.

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.

A spindle shaft 58 is pivotally supported by the bearings 53 and 54, and a disk-shaped outer peripheral rotor 60, an attraction magnet 61 attached to the disk 1 on the rotor, and an attraction magnet 61 on the attraction magnet are attached to the spindle shaft through a flange 59. Rotation-side components such as a disk drive pin 62 and a drive magnet 63 fixed to the inner surface of the rotor 60 so as to face the stator 56 are attached.

The base 10 also includes rotor removal stop portions 37 and 38 for preventing the rotor 60 from moving upward.
．． 39 is formed by cutting and raising a part of the base.

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 connected to the driving hole. By being fitted into the pin 62, the disk (recording medium) is accurately positioned and attached to the rotor 60.

13 and 14 are side views showing the operation of the cassette guide 20. FIG. 13 shows the state in which the cassette guide is raised (state D where the disk cassette 14 is not installed or in the middle of insertion), and FIG. Fig. 14 shows state B in which the cassette guide is lowered (when the disk cassette is installed).

In FIGS. 13 and 14, the slide plate 2
A groove-shaped cam portion 65 is formed in each of the rising portions 27 provided on both sides of the cam portion 3 .

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.

Each cam groove 65 has a cassette guide 20 as described above.
The cam pins 28 provided on both sides of the cam are engaged with each other.

The guide pins 21 provided at the center of both sides of the cassette guide 20 are engaged with the vertical grooves 22 (indicated by two-dot chain lines) of a predetermined length formed on both sides of the base 10. The cassette guide 20 moves only in the vertical direction (
It is installed so that it can be moved up and down.

Therefore, in the state shown in FIG. 13, the front panel 16
When the disk cassette 14 is inserted into the cassette insertion slot 15 and pushed all the way in, the latch member 26 is rotated by the tip of the cassette, as explained in FIGS. 8 and 9, and the slide plate 23 is rotated. The engaging portion 45 separates from the engaging edge 43, and the slide plate engages the tension spring 2.
5, it is moved in the direction of arrow C (direction toward the front puzzle 16).

Therefore, each of the cam pins (4 locations in total) is 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, the basting position of the cassette guide 20 is regulated,
In addition, since each cam groove 65 is engaged with each cam pin 28, the slide plate 23 is at the forward stop position (the 14th
) is determined by the shape of the cam portion 65.

Note that reference numerals 66 in FIGS. 13 and 14 indicate protrusions for supporting the slide plate 23 provided at a plurality of locations on the base 10.

FIG. 15 is a side view showing the structure of the head unit 32 (FIG. 4).

In FIG. 15, the head unit 32 has a structure in which each component is mounted on a carriage 68.

Further, on the carriage 6, there are attached an upper rad 69 for recording and reproducing the upper track of the disc, and a lower rad 70 for recording and reproducing the lower track of the disc.

The head unit 32 (or carriage 68) has a shape having a predetermined length in the radial direction, as shown, so that each head 69, 70 can record and reproduce 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 is attached to the carriage 6 so as to be movable up and down.

In the illustrated example, an 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 arm.

The upper head 69 and the lower head 70 are attached at positions facing each other.

The leaf spring 71 and the support member 73 are fixed to the carriage 68 by screws 74 .

The support member 73 is provided with a hend load that biases the arm 72 toward the disk to bring the head 69 into a loaded state (a state in which it contacts or approaches the disk and is capable of recording or reproducing). A spring 75 is attached.

The head 69 indicated by a two-dot chain line indicates the loaded state of the head.

Further, on the side surface (one side or both sides) of the arm 72,
A projecting portion (lifting point) 76 is formed for lifting (unloading) the arm by utilizing the lifting of the cassette guide 20.

Note that the two-dot chain lines 14A and 14B in FIG. 15 indicate the relative positions of the diffuser cassette 14 at 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 in the radial direction by the motor 34, a head seek operation of the head unit 32 is performed.

16 is a partial plan view showing the relationship between the head unit 32 with the arm 72 and upper head 69 etc. removed in FIG. 15 and the helad seek means, and FIG. -X■ is a cross-sectional view along the line.

16 and 17, a head seek motor (for example, a stepping motor) 34 is attached to the rear wall portion 10A of the base 10, and both ends of a screw shaft 35, which is an output shaft thereof, Rear wall part 1
It is rotatably supported by the 0A and the rising portion 10B.

Also, seek (
Both ends of the guide bar 36, which guides the radial movement), are supported in parallel to the radial direction by the rear wall portion 10A of the base 10 and another rising portion 10c.

Therefore, a plate spring 78 is attached to the lower surface of the overhanging portion 77 of the carriage 68 and is pressed against the screw shaft 35, and the carriage has a screw groove extending laterally and forming a screw groove on the lower side of the screw shaft 35. A needle pin 79 that engages with is fixed.

Therefore, when the screw shaft 35 is rotated by the motor 34, the head unit 32 (carriage 68) moves in the radial direction of the disk via the needle pin 79, and a seek operation is performed to align the head 69, 79 with an arbitrary track. It is done.

Furthermore, bearing portions 80 that are slidably fitted to the guide bar 36 are provided at three locations on the opposite side of the carriage 68;
The head unit 32 is configured to be able to accurately guide the head unit 32 during the seek operation.

Note that the head unit 32 shown by the solid line in FIG.
The Hendro 9.70 is shown in the innermost track position, and the chain double-dashed line 32 in FIG. 16 shows the head unit 32 when the head is in the outermost trunk position.

18 and 19 are partial side views showing the main structure of an embodiment of the disk device according to the present invention. FIG. 18 shows the head in the lowered position (loaded), and the first
Figure 9 shows the head in the raised position (unloaded).

FIG. 20 is a plan view taken along line xx-xx in FIG. 18.

In FIGS. 18 to 20, the henodonk means 3
An arm 72 is attached to the carriage 68 guided and supported by the arm 72 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 arm 72.

The upper end 69 is used for recording and reproducing information on the upper track of the disk.

In the illustrated example, a lower head 70 for recording and reproducing the lower track of the disk is attached to the leading end of the carriage 68 itself.

Both ends of the plate spring 71 are fixed to the carriage 68 and the arm 72, and the length of the spring portion is, for example,
1/2 to 1/2 of the length between the fulcrum G and the head 69 (described later)
The length is set to be relatively long.

In this embodiment, the leaf springs 71 are composed of two left and right leaf springs, as shown in FIG. 20, but they can also be composed of one leaf spring or three or more leaf springs.

The root (proximal end) G of the carriage 68 example of the plate spring 71 serves as a fulcrum for the lifting portion consisting of the plate spring and the arm 72.

A predetermined position of the arm 72, in the illustrated example, the leaf spring 7
A projecting portion 76 that can come into contact with the upper surface of the spatula lifter portion 81 of the cassette guide 20 is formed on both sides near the base end portion on the first side.

This projecting portion 76 is a point (H) on which a pushing force is applied when the cassette guide 20 rises, that is, a lifting/lowering point of the arm.

On the other hand, the support member 73 fixed to the carriage 68 has
A head load spring (
In the illustrated example, a torsion coil spring 75 is attached.

Note that the support member 73 and the plate spring 71 are fixed on the carriage 68 by screws 74 (in the illustrated example, at two locations).

The head loading spring 75 presses the upper surface of the arm 72 downward with its tip 75A.
The point of contact between the arm 72 and the arm 72 is the load point of the arm.

Therefore, this load point has the above-mentioned lifting point H.
Therefore, the head 69 is set at the position of the head 69.

Further, the carriage 68 is provided with a protrusion (stopper) 82 that comes into contact with the lower surface of the leaf spring 71 in the loaded state shown in FIG.

This protrusion 82 is in the above-mentioned umbilical loading state, that is,
The cassette guide 20 descends and the hend lifter part 8
1 is separated from the arm 72 and the arm 72 is lowered (head loaded) by the spring 75, and functions as a stopper to prevent the leaf spring 71 from deforming downward.

The contact point (stop point) J of this stopper 82 is usually selected at a position approximately at the center of the length of the leaf spring 71.

The plate spring 71 can be made of various elastic members such as plastic in addition to metal as long as it has elasticity in the vertical direction. It can also be formed by

With the above configuration, one embodiment of the disk device of the present invention,
That is, in a disc device that records or reproduces information on or from a disc by rotating the disc as a recording medium and moving the handle 9 on the carriage 68 in a predetermined direction, the elastic member or elastic portion 71 is used. An arm 72 supported so as to be able to rise and fall through the
The head 69 is attached to the disk device, and a stopper 82 is provided below the elastic member or elastic portion 71 to prevent downward deformation of the elastic member or the elastic portion. It is configured.

FIG. 21 is an explanatory diagram schematically showing the head raising and lowering operation of the head unit 32 described in FIGS. 18 to 20.

In FIG. 21, the solid line shows the state in which the arm 72 is in the lowered position (FIG. 18), the chain line shows the state in which the arm 72 is in the raised position in this embodiment of FIG. The arm in the head unit is shown in a raised state.

In the conventional head unit, the arm 72 and the head support member corresponding to the leaf spring 71 are substantially straight in the raised position.

In this embodiment, when the arm 72 is in the raised position (head unloaded state B), the pressure point of the head loading spring (load point date K) is as shown in FIGS. 19 and 21. Since it is set closer to the head 69 than the lifting force application point (lifting point 1-) H by the cassette guide 20, a counterclockwise moment acts on the arm 72.

Therefore, the tip of the leaf spring 71 is curved in a direction that approaches the horizontal, resulting in a so-called bent neck state.

Therefore, the arm 72 is also displaced in the head-down direction approaching the horizontal, and its inclination angle is reduced from the conventional angle θ to the angle θ2, and the arm 72 is at its highest position (in the illustrated example, the lowered position of the head 69 is referenced). The highest position of the head unit 32) is reduced from the conventional height S to the height S2.

The relationship between the highest position S of the arm 72 and the inclination angle θ of the arm is based on the distance between the head 69 and the tip of the arm.
If P is the total thickness of the head and the arm, it can be expressed by the following equation.

S = l tar1θ0P where! Since and P remain unchanged, the closer the inclination angle θ of the arm 72 is to the horizontal, the smaller the maximum height S of the head unit 32 can be.

In addition, the inclination angle θ of the arm 72 can be made closer to horizontal as the length of the leaf spring 71 becomes larger.
The neck bending effect can be enhanced.

According to the embodiment described above, in the structure in which the head 69 is attached to the arm 72 supported via the leaf spring 71, the pressure point K of the head loading spring 75 is set from the point H of the head lifting force to the head 69. Since it is set on the side, when the head is raised with respect to the fulcrum G (during unloading), it is possible to give the plate spring 71 a neck bending effect in the direction of lowering the head, and the maximum height of the arm 72 ( The maximum height of the head unit 32) S could be reduced.

Therefore, a space is created between the arm 72 and the cover 12 of the device, and the height (thickness) of the entire device can be reduced accordingly, making it possible to make the disk device thinner. did it.

Furthermore, since a stopper 82 is provided below the leaf spring 71 to prevent the leaf spring from deforming downward, even when the length of the acid release spring is set to be large, it is possible to It is now possible to reliably prevent contact and slippage between the plate spring 71 and the disk cassette 14 etc. during loading).

Further, by using a long and thin plate spring 71 to minimize residual stress, the degree of freedom in design can be greatly improved.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, information is recorded on or reproduced from the disk by rotating the disk as a recording medium and moving the head on the carriage in a predetermined direction. In the disk device, the head is attached to an arm that is movably supported via an elastic member or an elastic section, and the head is attached to a lower side of the elastic member or the elastic section to prevent downward deformation of the elastic member or the elastic section. Since the structure is provided with a stopper for this purpose, when the head is raised by a certain amount with respect to the fulcrum, the elastic member or elastic portion can be displaced in a direction approaching the horizontal position, and the maximum height of the head unit can be displaced by that amount. A disk device is provided in which the height of the section can be kept low, and the overall height (thickness) of the device can be reduced to make it thinner and smaller.

[Brief explanation of drawings]

Fig. 1 is a plan view of a disk device suitable for applying the present invention, Fig. 2 is a side view taken from the line - - in Fig. 1, and Fig. 3 is a side view taken from the line - - in Fig. 1. 4 is a plan view of the disk drive shown in FIG. 1 with the cover removed; FIG. 5 is a cross-sectional view taken along line VV in FIG. 4; and FIG. Fig. 7 is a plan view of the disk device shown in Fig. 4 with the cassette guide removed, Fig. 8 is a partial side view taken from the middle line
FIG. 9 is a partial plan view showing the latch member in FIG. 8 in the unlatched state; FIG. 10 is a side view taken from line X-X in FIG. 9. Figure 11 is a plan view of the disk rotation drive motor in Figure 7, Figure 12 is a longitudinal sectional view taken along the line xn-x■ in Figure 11, and Figure 13 is the cassette guide in Figure 4. Fig. 14 is a side view showing the cassette guide in a lowered state from Fig. 13, Fig. 15 is a side view of the head unit in Fig. 4, and Fig. 16 is a side view of the head unit in Fig. 4. FIG. 17 is a cross-sectional view taken along the line X--X in FIG. 16, and FIG. 18 is a partially cutaway view showing the head seek means of FIG. FIG. 19 is a partial side view showing the main components of an embodiment of the device in a state when the head is lowered; FIG. 19 is a partial side view showing the same part as FIG. 18 in a state when the head is raised; FIG. 20 is FIG. middle j+IXX-X
FIG. 21, a plan view seen from X, is a schematic diagram for explaining the lifting and lowering operations of the leaf spring and arm in FIG. 18. Below, symbols representing main components in the drawings are listed. 10・---1--Base, 12----Cover, 1
4. Issuf cassette, 16----front panel, 20 cassette guide, 21--guide pin,
22 Vertical groove, 23・------Slide plate, 2
4-----Disk rotation drive motor, 25--11-11 tension spring, 26--Latch member, 27-----Rising portion (slide plate), 2 B -----One cambin, 32------
- Head unit, 33--Head seek means, 34
- Heshito seek motor, 35 screw shaft, 36 - guide bar, 42 - 11 - ejector spring, 65 - - 1 cam groove, 68 herad carriage, 69.70 - ---One Head, 71-
---An elastic member or elastic part (plate spring), 72--
---Arm, 81--head lifter part (cassette guide), 82 stopper (protrusion), G fulcrum, H lifting point, K--load point, J-stop point.

Claims (1)

[Claims] (1) In a disk device that records or reproduces information on or from a disk by rotating a disk as a recording medium and moving a head on a carriage in a predetermined direction, the The head is attached to an arm that is supported so as to be movable up and down, and a stopper is provided below the elastic member or the elastic part to prevent downward deformation of the elastic member or the elastic part. disk device.