JPH0485770A - Disk device - Google Patents

Abstract

PURPOSE:To reduce the thickness and a total size of a disk device by attaching a head to an arm supported movably up and down via an elastic part and prescribing the upper limit position of the arm with a stopper fixed to the base of the disk device. CONSTITUTION:A head 69 is attached to an arm 72 supported via a plate spring 71, and a pressing point K on a head loading spring 75 is set at a point closer to the head 69 than an acting point H of the head raising force. Therefore the bending effect is applied to the spring 71 in the head lowering direction when the head 69 is moved up on the basis of a fulcrum G. Thus the maximum height of the arm 72 can be reduced. At the same time, a stopper 83 having a touch at a position closer to the head 69 than the point H of the arm 72 is fixed to a base 10. So that the upper limit position of the arm 72 is prescribed and also the bending effect of the spring 71 is improved in its head lowering direction. Thus a space margin is produced between the arm 72 and a cover 12 of a disk device. Therefore the overall height (thickness) of the disk device can be reduced and a thin disk device is obtained.

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 displaying.

[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 driving means for rotating the disk by a motor, a head seeking means for moving the head to an arbitrary track position along the radial direction of the disk, a head loading 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 connector, 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 processors, and are sometimes configured as independent devices, but in -C, they are often built into the main body of electronic devices. .

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 the disc includes a cassette guide having a guiding function for inserting, ejecting, loading, and unloading the disk cartridge;
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 an arm for holding the head attached to a fulcrum provided in the carriage for seeking, so as to be rotatable in the vertical direction. The arm is biased (loaded) toward the disk by a spring, and the arm is rotated upward (unloaded) using the rise of the force center 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 the head is unloaded, such as when ejecting a cassette, the arm member rises upward from the fulcrum in a substantially straight line 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.

In addition, the upper limit position of the highest part of the head unit cannot be accurately regulated, and the height of the component housing portion such as the heath needs to be determined with a margin in relation to the upper limit position of the head unit. There was also a technical problem in that the height (thickness) of each division became large.

The present invention was made in view of such 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, and also to reduce the height of the highest part of the head unit. It is an object of the present invention to provide a disk device in which the upper limit position can be accurately regulated, and the overall height (thickness) of the device can be reduced accordingly to achieve miniaturization.

[Means for Solving the Problems] The present invention provides a disk device that records or reproduces information on or from a disk by rotating the disk as a recording medium and moving a head on a carriage in a predetermined direction. , the heno-de is attached to an arm supported movably up and down via an elastic member or an elastic part, and the upper limit position of the arm is regulated by a stopper fixed to the head of the disk device. It is an object of the present invention to provide a disk device in which the upper limit position of the highest part of a head unit can be accurately regulated, and the overall height (thickness) of the device can be reduced accordingly to achieve miniaturization.

〔Example] Hereinafter, the present invention will be described in detail 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, 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.

Fig. 1 is a plan view of the disk device, Fig. 2 is a right side view taken from line ■-■ in Fig. 1, and Fig. 3 is a front view taken from line ■-■ in Fig. 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.
A cover 12 is attached to the top surface of 0.

Further, a front panel 16 is attached to the front surface of the base 0. A front panel 16 is formed with a cassette insertion opening 15 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 V--■ in FIG. It is.

4 to 6, the cassette guide 20 has a shape that guides and holds the disk cassette 14, and guide bins 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 a hard 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 cough cassette 7) 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 (launched) 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.

This cassette guide 200 front and rear on both sides (4 locations in total)
, each of the cam portions (cam grooves) of the slide plate 23
A cam bin 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 bin 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 loading position (FIG. 14).
It is configured as follows.

When ejecting the disk cassette 14 inserted into the disk device, the eject button 31 attached to the slide plate 23 is pushed in from above the front panel 16 to move the slide plate to the rear position and release the latch member. 26 is rotated back by the spring force, and the disk unit 14 is ejected forward by the rotating force.

4 and 7, a head seek means (head moving means) 33 is provided within the base 10. As shown in FIG.

The second disk 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. This is the mechanism.

Note that the head moving means for loading and unloading the disk with respect to the disc is as described below.
It is provided within the hand unit 32.

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 the rotation of the motor into radial movement of the hend unibody 32, and a radial movement of the hend unibody 32 with accuracy. a guide bar 36 for guiding;
Each of these components is based on base 1.
0 at a predetermined position.

FIG. 8 is a partial plan view showing the main parts of the disk cassette before it is installed (latch member engaged state - latched state), and FIG. It is a plan view showing the same part as the figure, and the first
Figure 0 is a side view of Figure 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 arc-shaped retaining edge 43 and a sliding edge (
or a stopper edge) 44 is formed.

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

The latch member 26 also includes a disk cassette]4
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 the 8th article. .

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 it reaches the final position, the retaining 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 installed (lunch release state).

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). 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 state D (recordable and reproducible state).

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 disk cassette 14 that is in contact with the push-out arm 46 is ejected forward by the rotational 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 line X--XH in FIG. .

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 adsorption magnet 61 for adsorbing a disk on the rotor, and an adsorption magnet on the adsorption magnet are attached to the spindle shaft through a flange 59. Rotation-side components such as a disk drive bin 62 and a drive mag throat 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 a retaining hole (not shown) of the disk is connected to the drive bin. By being fitted into the rotor 62, the disk (recording medium) is accurately positioned and attached to the rotor 60.

FIG. 13 and FIG. 14 are side views showing the operation of the cassette guide 20. FIG. The figure shows a state in which the cassette guide is lowered (when a 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 bins 28 provided on both sides of the cam bins 28 are engaged with each other.

The guide bins 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 (7). The cassette guide 20 is mounted so as to be movable (up and down) only in the vertical direction.

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 in the direction of arrow C (direction toward the front panel 16).

Therefore, each of the cam bins 28 (four 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. 14.

In this case, the lowering position of the cassette guide 20 is regulated,
In addition, since each cam groove 65 is engaged with each cam bin 28, the slide plate 23 is at the front 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 Herad Unisoto 32 (FIG. 4).

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

Also attached to the carriage 68 are an upper head 69 for recording and reproducing information on the upper surface track of the disk, and a lower head 70 for recording and reproducing information on the lower surface track of the disk.

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 G9 is attached to the carriage 68 so as to be movable up and down.

In the illustrated example, on the sixth day of the carriage, an arm 72 is attached 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 6 with screws 74.

The support member 73 is provided with a head load for biasing the arm 72 toward the disk to put the head 69 in 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.

A head 69 indicated by a two-dot chain line indicates a 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 disk cassette 14 at the inner and outer positions of the head unit 320 in the radial direction.

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 arm 72 and upper head 69 etc. removed in FIG. 15, and FIG. -X■ is a cross-sectional view along the line.

In FIGS. 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 the screw shaft 35, which is its output shaft, are attached to the rear wall 10A of the base 10. 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 that 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 bin 79t, 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 heads 69, 70 are shown in the innermost track position, and the dash-dotted line 32 in FIG. 16 shows the head unit 32 when the cough 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 plane view seen from line xx-xx in FIG. 18.

FIG. 21 is a plan view showing the base and head unit of the disk device according to one embodiment of the present invention, and FIG.
2 is a side view taken from line xxn-xXH in FIG. 21, FIG. 23 is a partial plan view of the range xxm-xxm in FIG. line XXIV
-XXrV is a partial side view, and FIG. 25 is a 2nd
FIG. 3 is a partial sectional view taken along line XX to '-xxv in FIG. 3;

In FIGS. 18 to 21, the head seek means 3
3, an arm 72 is attached to a carriage 68 via a plate spring 71 so as to be movable up and down about a fulcrum G, and the upper head is attached to the tip of the arm 72. 69 is installed.

This upper head 69 is for recording and reproducing 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 leaf spring 71 are fixed to the carriage 68 and the arm 72, and the length L of the spring portion is, for example, 1/2 to 1/4 of the length between the fulcrum G and the head 69, which will be described later.
The length is 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 base (base end) of this plate bar 271 on the carriage 68 side is
It serves as a fulcrum G of the elevating portion consisting of the cough 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 hend lifter portion 81 of the front cassette guide 20 is formed on both sides near the base end portion on the first side.

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

Incidentally, the lifting point (20) may be provided only on one side.

On the other hand, the support member 73 fixed to the carriage 68 has
A head loading bar 2 (
In the illustrated example, a torsion coil spring 75 is attached.

Note that the support member 73 and the plate bar 271 are fixed on the carriage 68 by screws 74 and rotation prevention means 84.

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, it is set at a position closer to 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 head loaded state shown in FIG.

This protrusion 82 is in the above-mentioned head loaded state, that is,
The cassette guide 20 descends and the head 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 L of the plate spring 71.

Furthermore, a stopper 83 (FIG. 21) for regulating the upper limit position of the arm 72 is fixed to the base 10.

On the other hand, stop pins 85 that can come into contact with the lower surface of the stopper 83 are provided at predetermined positions on both sides of the arm 72 (in the illustrated example, approximately the same positions in the front-rear direction as the head 69).

The position of the stop bin 85 and the stop point M where the arm 72 can come into contact with the stopper 83 at the head raised position are set at the position of the head 69 from the lifting point H.

In the illustrated example, the stop point) M is set further toward the head than the load point (in the illustrated example, at the same position of the hobo head 69); If it is closer to the head than H, it can also be set to the side opposite to the head from the load point.

The stopper 83 is composed of a plate-like member having a planar shape as shown in FIG.

At the 2nd jllll and the 22nd stop, the stopper 83 connects the hook portions 86.
7.87, and is fixed to the upper end of the base 10 by screwing bent portions 88.88 formed on both rear sides of the base 10 to both sides of the base 10.

Although the stopper 83 is made of a flat plate-like member in the illustrated example, it is preferable that it is made of a thinner plate-like member with a reinforcing bead or the like formed thereon.

In FIGS. 23 to 25, each hook portion 86 has an outer regulating portion 91 that has a hook shape that engages with the protrusion 87 and can come into contact with the outer surface of the side wall of the base 10, and an outer regulating portion 91 that is attached to the inner surface of the side wall of the base 10. An abuttable inner regulating portion 92 is formed.

Further, the rear upper end surface 93 of the hook portion 86 can come into contact with the front end surface 95 of the reference protrusion 94 at the upper end of the base 10, and these end surfaces 93.95 constitute the tension application point of the stopper 83. There is.

The stopper 83 is attached using the hook portions 86 on both sides.
While rotating in the direction of arrow
This is done by screwing 88 to the base 10.

With this stopper 83 attached, the rear upper end surface 9 of the hook portion 8G forming the tensile force application point is
3 and the front end surface 95 of the reference protrusion 94, dimensional accuracy is ensured so that there is almost no gap.

In this way, the stopper 83 fixed to the base 83 exerts tension through the tension application point when the base is deformed by receiving an external force, and is therefore a reinforcing member that resists the external force of the base. It functions as a

Further, an opening 96 is formed in a portion of the stopper 83 corresponding to the head unit 32, and the upper limit position of the arm 72 of the head unit 32 is controlled by the both side edges of the opening and the stop bins 85 on both sides. A regulating stopper mechanism is configured.

Note that the cover 12 is attached to the upper side of the plate-shaped stopper 83.

In the illustrated example, an opening 97 is formed at a predetermined position of the stopper 83, and even when the stopper is fixed, a predetermined component in the base lo (for example, position alignment between the reference track and the head) can be inserted through the opening. It is configured so that it can be screwed onto a sensor (such as a sensor that detects

With the above configuration, one embodiment of the disk device of the present invention,
That is, in a disk device that records or reproduces information on or from a disk by rotating a disk serving as a recording medium and moving a head 69 on a carriage in a predetermined direction, an elastic member or an elastic portion 71 is used. An arm 72 supported so that it can be raised and lowered via
The hendro 9 is attached to the arm 7 by a stopper 83 fixed to the base 10 of the disk device.
A disk device is configured that is characterized by regulating the upper limit position of No. 2.

Furthermore, in the above configuration, the stopper 83 is provided so as to be able to come into contact with a position (stop point) M of the head 69 from the lifting point H of the arm 72 when the head is raised.

FIG. 26 is an explanatory diagram schematically showing the head raising operation of the head unit 32 described in FIGS. 18 to 25.

In FIG. 26, the solid line indicates the state in which the arm 72 is in the lowered position (FIG. 18), the chain line indicates the state in this embodiment (19th time) in which the arm 72 is in the raised position, and the two-dot ui line indicates It shows the raised state of the arm in a conventional head uninote.

In the conventional head unit, the head support member corresponding to the arm 72 and the leaf spring 71 is inclined substantially linearly (inclination angle θI) with respect to the fulcrum G in the raised position.

In this embodiment, when the arm 72 is in the raised position (head unloaded state), FIGS. 19 and 26 (
As shown in the chain line), the pressure point (load point) K of the hesitrode spring is set closer to the head 69 than the lifting force application point (lifting point) H by the cassette guide 20, so that the arm A counterclockwise moment will act on 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 = 1. tanθ+P Here, since ρ 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. The larger the length of the leaf spring 71, the easier it can be brought to the horizontal position.
The neck bending effect can be enhanced.

Note that the symbol Q in FIG. 19 indicates the interval between the upper and lower heads 69 and 70 when the heads are raised.

Furthermore, in addition to the head load spring 75, the base 1
Since the stopper 83 fixed at 0 is used, the upper limit position of the arm 72 can be more reliably regulated.

In this case, since the stopper 83 also functions as a reinforcing member for the base 10, one member 83 can realize both the functions of regulating the maximum height of the head unit 32 and reinforcing the base 10.

Further, since the contact point (stop point) M of the stopper 83 is set closer to the head than the lifting point H, the forward bending effect by the head loading spring 75 can be further promoted, and when the head is raised, The arm 72 can be brought closer to the horizontal position more easily.

According to the embodiment described above, in the structure in which the hendroid 9 is attached to the arm 72 supported via the leaf spring 71, the pressure point K of the head load spring 75 is moved 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 leaf 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.

At the same time, a stopper 83 that contacts the arm 72 at a position closer to the head than the lifting point H is fixed to the base 10, so that the upper limit position of the arm 72 is reliably regulated and the plate spring 71 is lowered in the head-down direction. It was possible to further reduce the maximum height S of the arm 72 by further promoting the neck bending effect.

Therefore, a space is created between the arm 72 and the cover 127 of the device, and the height (thickness) of the entire device can be reduced by that amount, thereby making the disk device thinner. was completed.

Furthermore, since the stopper 83 is in contact with the base 10 via the tensile force application point, when the base 0 is deformed by receiving an external force, the stopper 83 exerts a tensile force and is reinforced to counteract the deformation of the base. It also functions as a member.

Therefore, by reducing the wall thickness of the base, it was possible to reduce the weight and thickness of the base.

It is preferable that the member 83 has a structure in which the wall thickness is reduced and a bead or the like is formed to reinforce it.

Further, an opening such as a window (in the illustrated example For example, it is preferable to arrange the stopper 83 so that there is no opening 96 formed corresponding to the head unit 32), so that the stopper 83 has a structure that does not bend when a bow tension force is applied to the stopper 83.

Note that the cover 12 is provided above the stopper 83, and by providing the stop and bar 83 with the above-described structure, the effect of reinforcing the base 10 and the effect of shielding each component can be obtained. The cover 12 is
It is now possible to use something that is extremely thin and light, such as a plastic film, as long as it has a dust-proofing effect.

Furthermore, since the stopper 83 is disposed near the top of the head unit 32, it was also possible to realize the function of protecting the head 69, 70 and its surroundings.

Furthermore, since a stopper 82 is provided on the lower side of the leaf spring 71 to prevent the leaf spring from deforming downward, even when the length of the leaf spring is set to be large, when the head is lowered (loaded). It is now possible to reliably prevent contact or slippage between the leaf spring 71 and the dispersion center 14, etc. during the above-mentioned operation.

Furthermore, the degree of freedom in design could be improved by making the leaf spring 11 long and thin to eliminate residual stress after displacement.

Furthermore, in order to reduce the sliding resistance between the stop pin 85 and the stopper 83, a rotatable member such as a rotatable roller may be provided in place of the stop pin 85.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, information is recorded on or reproduced from a disk by rotating the disk as a recording medium and moving a head on a carriage in a predetermined direction. In the apparatus, the head is attached to an arm that is supported so as to be able to move up and down via an elastic member or an elastic part, and the upper limit position of the arm is regulated by a stopper fixed to the base of the disk apparatus. By accurately regulating the upper limit position of the lowest part of the head unit, the overall height (thickness) of the device can be reduced accordingly, making it possible to downsize the device.Moreover, the reinforcement effect of the stopper allows the base to be A disk device that can be made lighter and thinner is promoted.

[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 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 the line V-■ 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 plan view of the launch member shown in FIG. 7 in the latch state. 9 is a partial plan view showing the latch member in FIG. 8 in a released state, FIG. 10 is a side view taken from line XX in FIG. 9, and FIG. 11 is a partial plan view showing the latch member in FIG. A plan view of the disk rotation drive motor, FIG. 12 is a longitudinal sectional view taken along the line xn-xn in FIG. 11, FIG. 13 is a side view of the cassette guide shown in FIG. 4 when it is raised, and FIG. FIG. 13 is a side view showing the state in which the cassette guide is lowered, FIG. 15 is a side view of the head unit in FIG. 4, FIG. 16 is a side view of the head unit in FIG. 17 [iJ is a cross-sectional view taken along the line X--X in FIG. 16, and FIG. FIG. 19 is a partial side view showing the state when the head is lowered; FIG. 19 is a partial side view showing the same part as FIG. 18 when the head is raised; FIG. 20 is the line XX in FIG. 18.
- A plan view as seen from XX, FIG. 21 is a plan view showing the stopper and head unit fixed to the base, and FIG.
The figure is a side view taken from the line xxn-xx■ in Figure 21, Figure 23 is a partial plan view of the range XX■ in Figure 21, and Figure 24 is a partial plan view of the range XX■ in Figure 21.
The figure is a partial side view taken along the line XXrV-XXIV in FIG. 23, FIG. 25 is a partial sectional view taken along the line xxv-xxv in FIG. 23, and FIG. FIG. 3 is a schematic diagram for explaining the raising and lowering operation of the arm. Below, symbols representing main components in the drawings are listed. 10--base, 12-cover, 14-disk cassette, 16-front panel, 20-cent guide,
23--111 slide plate, 24--disk rotation drive motor, 26 launch member, 28.65.
-----One cam mechanism, 32 head unit, 33...
- Head seek means, 34°"° - Head seek motor, 35 - Screw shaft, 36 - Guide bar, 68 - - Carriage, 69.70 -
...-Head, 71--Elastic member or elastic part (plate spring), 72--Arm, 81--
--Part of head lifter (cassette guide), 82--
Stopper (carriage), 83.--Stopper (base), 85-1-...stop pin, 8
6---Hook part (stopper), 87'--
-F, projection for re-engaging, 88--Bending part (screwed part of stopper), 93.95--1 tensile force application point, C--1 fulcrum, H--1 - Lifting point, K - Load point, J - Partial spring stop point, M arm stop point. Figure 4

Claims (2)

[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 A disk device, wherein the head is attached to an arm that is supported to be movable up and down, and an upper limit position of the arm is regulated by a stopper fixed to a base of the disk device. (2) The disk device according to claim 1, wherein the stopper is capable of contacting a position of the arm closer to the head than the lifting point.