JPH0482064A - Disk device - Google Patents

Abstract

PURPOSE:To miniaturize a disk device by attaching heads to an arm which is so supported through an elastic member or part that it can rise and fall and providing a carriage with a stopper which controls the upper limit position of the arm. CONSTITUTION:A lower head 70 is attached to the front end part of a carriage 68, and an arm 72 is attached to the carriage 68 through a flat spring 71 so that the arm can rose and fall, and an upper head 69 is set to the front end part of the arm. The carriage 68 is provided with a projecting part (stopper) 82 which is abutted on the lower face of the 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 it can rise and fall, and the carriage 68 is provided with the stopper 82 which controls the upper limit position of the arm 72. Thus, the overall height (thickness) of the device is reduced to miniaturize the device.

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, and more specifically, in the disk device, a head on a carriage is moved relative to the disk. This invention relates to the structure of a head loading means for raising and lowering.

[Prior Art] The disk device described above is a device that records or reproduces 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.

Said disc packaging! Here, an insertion/ejection means for mounting and ejecting a disk is provided on a base that supports each component;
A disk rotation driving means for rotating the disk by a motor, a head loading 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 T-8 connection connector, etc. are provided, and the control circuit is connected to a host device etc. via an interface.

Such a disk device is used as an external storage device for electronic equipment such as a personal computer or a word processor, and although it may be configured as an independent device, it is generally incorporated into the main body of the electronic equipment in many cases.

In addition, as electronic devices become smaller and more portable, the above-mentioned disk-mounted devices are becoming more compact and portable. However, there is a strong demand for smaller, lighter, and thinner devices.

By the way, the insertion/ejection means for loading and ejecting the disc includes a cassette guide having a guiding function for inserting, ejecting, and loading/unloading the disk cartridge;
and a slide plate having a cam portion for raising and lowering the cassette guide6.Furthermore, the head loading means for loading and unloading the head with respect to the disk is provided on the head seek carriage. An arm for holding the cassette is attached to the fulcrum so that it can rotate in the vertical direction, and a spring for loading the head biases (loads) the arm toward the disk, and the arm is moved using the rise of the cassette guide. It is configured to be rotated upward (unloading).

[Technical Problems to be Solved by the Invention] In the conventional umbilical loading means of a disk device, the head is attached to an arm member that is rotatable about a fulcrum on the 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. One technical problem was that the internal height of the disk device had to be increased to avoid contact with the disk device, and the thickness (height) of the disk device became correspondingly large.

Furthermore, it is not possible to accurately regulate the upper limit position of the highest part of the head unit, and it is necessary to determine the height of the component storage portion such as the base 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.

CII! T! Means for Solving] 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 head is attached to an arm that is movably supported via a member or an elastic part, and the carriage is provided with a stopper for regulating the upper limit position of the arm, so that the head can be kept constant. Not only can the height of the highest part of the head unit be kept low when raising the head unit, but also the upper limit position of the highest part of the head unit can be accurately regulated. It is an object of the present invention to provide a disk device that can be made smaller by reducing the number of disks.

〔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.

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

Further, on the front of the base 10, a disk device is provided.

A front panel 16 is attached in which a cassette insertion opening 15 for inserting and ejecting a cassette 14 is formed.

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 IO, 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 diagram showing a cross section of the base lO and the cassette guide 20 along vAv-■ in FIG. 4, and FIG. 6 is a partial side view taken from the line ■-■ in FIG. be.

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 bins 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 .

A disk (magnetic disk, etc.) as a recording medium is housed inside the disk cassette 14 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 the seventh article, a cam part was 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 launch member 26 to be described later, and in the engaged (launched) state is held at a 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 cam groove) having a 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 (a kind of stopper). 13
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 sides of this cassette guy F20 (total 4m)
, 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 latch member 26 is released and the slide plate is moved forward by the tension bar 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 set in the disk device, push the eject button 31 attached to the slide plate 23 from above the front panel 16, move the slide plate to the rear position, and release the latch member. 26 is rotated back without 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 moves 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 for making

Note that head loading means for loading and unloading the hemo onto 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 steering wheel or a pin 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 direction of the head unit 32. a guide bar 36 for accurately guiding directional movement;
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 before the disk cassette is installed (launch member engaged state = latched state), and FIG. 9 is a partial plan view of the main part before the disk cassette is installed (launch member released state - launch release). It is a plan view showing the same part as the first
Figure 0 is a side view of Figure 9.

Next, referring to FIGS. 8 to 10, slide plate 2
3 and the operation of the launch member 26 will be explained 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 is formed with an arc-shaped engagement edge 43 and a slide edge (or stopper edge) 44 that extends approximately in the front-rear direction with a launch release shape of 1 m (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 in the rear position against the tension spring 25. has been done.

In addition, the disk cassette 14 is attached to the third member 26.
A push-out arm 46 is provided which abuts the front end of the.

The pushing arm 4ε 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 shunter 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 it reaches the final position, the retaining edge 43 separates from the engaging portion 45 of the slide plate 23 and enters the launch release state, 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 attached (latch released).

At this time, the latch member 26 is held at the 9M position by the contact between the retaining portion 45 of the slide plate 23 and the slide edge 44 (rotation direction shifter), and in this state, the latch member By the 26 push-out arms 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 an open state LIi (recordable and reproducible state 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 .

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 heel 10 with screws 52, and on the stator yoke are a bearing housing 55 holding bearings 53 and 54, a stator 56, and a coil 57. Fixed side components such as are attached.

A spindle shaft 58 is rotatably supported by the bearings 53 and 54, and a disk-shaped outer peripheral rotor 60 is attached to the spindle shaft via a flange 59, and a suction magnet 6m for adsorbing the disk on the rotor is attached to the spindle shaft through a flange 59. Rotating 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 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 are side views showing the operation of the cassette guide 20, and FIG. 13 shows the state in which the cassette guide is raised! (State B in which the disk cassette 14 is not installed or in the middle of insertion), and FIG. 14 shows a state 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 2B provided on both sides of the cam pins 2B 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 IO. 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 cassent 14 is inserted into the cassette insertion opening 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 The engaging portion 45 of the slide plate 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 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.

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 6) has a shape having a predetermined length in the radial direction as shown in the figure so that each track can be recorded and reproduced by each Hendro 9.70.

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 68 so as to be movable up and down.

In the illustrated example, an arm 72 is attached to the carriage 68 via a leaf 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 has a structure in which the head 69 is placed in a loaded state by urging the front arm 72 toward the disk.
! A head loading spring 75 is attached to bring the head into a state where it comes into contact with or comes close to the disk and is capable of recording or reproducing.

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 in the radial inner and outer positions of the head unit 32.

Further, two points 1 [24A] indicate 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 donk operation is performed to the head unit 32.

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

In FIGS. 16 and 17, the head seek motor (for example, stamping motor) 34 is located on the rear wall of the base IO! Both ends of the screw shaft 35, which is attached to the OA and is its output shaft, are connected to the rear wall 1 of the base 10.
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 (radial direction movement), are supported in parallel to the radial direction by the rear wall portion 1OA 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 6) moves in the radial direction of the disk via the needle bin 79, and a seek operation is performed to align the head 69, 79 with an arbitrary trunk. will be carried out.

Furthermore, bearing portions 80 that are slidably fitted to the kite 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 trunk position, and the dashed double-dot line 32 in FIG. 16 shows the head unit 32 when the heads are in the outermost track 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 spacing seek 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 with reference to a fulcrum G, and an upper head 69 is attached to the tip of the arm 72. .

The upper Hendro 9 is for recording and reproducing the upper track of the disk.

In the illustrated example, a lower end 70 for recording and reproducing the lower trunk of the disc 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 L of the spring portion is, for example,
1/2 to 1/2 of the length between fulcrum G and Hendro 9 (described later)
The length is set to be relatively long.

In this embodiment, the plate spring 271 is composed of two left and right plate springs, as shown in FIG. 20, but it can also be composed of one or three or more plate springs.

The root (proximal end) of the 68 carriages of this leaf spring 71 is
This serves as a fulcrum G of the elevating portion consisting of the leaf spring and the arm 72.

A predetermined position of the arm 72, in the illustrated example, the leaf spring 7
On both sides of the proximal end of the first side, a projecting portion 76 that can come into contact with the upper surface of the hend lifter portion 81 of the force center guide 20 is formed.

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.

Note that this ascending neighbor point H may be provided only on one side depending on the case.

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

Note that the support member 73 and the plate spring 71 are fixed onto 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 plate spring 71 in the 18th head loading state.

This protrusion 82 is in the above-mentioned head loaded state, that is,
The cassette guide 20 descends and the above-mentioned head lifter part 8
1 is separated from the arm 72 and the arm 72 is lowered (head loaded) by the bar A75. .

The contact point (stop point) J of this stopper 82 is usually the plate C:? , 71 is selected at a position approximately in the center of the length scale.

Further, the carriage 68 is provided with a stopper 83 for regulating the upper limit position of the arm 72.

In the illustrated example, the stone bar 83 is formed integrally with an extension of the support member 73 fixed to the carriage 6, and is arranged so as to come into contact with the upper surface of the arm 72 to regulate the upper limit position of the arm. has been done.

Further, a stop point M where the front third stopper 83 and the arm 72 come into contact is set at a position 9 degrees from the lifting point H.

In the illustrated example, the stop point M is set closer to the head than the load point, but
If this is closer to the head than the lifting point H,
It can also be set on the opposite side of the head from the load point.

The plate spring 71 can be formed of various elastic members such as plastics in addition to metal as long as it has elasticity in the vertical direction. , thin wall portion).

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 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 carriage 68, and a stop 83 for regulating the upper limit position of the arm 72 is provided on the carriage 68.

Furthermore, in the above configuration, the stopper 83 is configured to be able to come into contact with a point M of the head 69 from the lifting point H of the arm 72 when the head is raised.

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 indicates the state in which the arm 72 is in the lowered position (BC FIG. 18), the chain line indicates the state of this embodiment in which the arm 72 is in the raised position (FIG. 19), and the two-dot chain line indicates the state in which the arm 72 is in the raised position (FIG. 19). This shows the raised state of the arm in the head unit.

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), FIGS. 19 and 21 (
As shown in the chain line), the pressure point (load point) K of the helad load 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.

For this reason, the tip of the plate 271 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 changes from the conventional angle θ1 to the angle θ2.
The highest position of the arm 72 (in the illustrated example, the highest position W of the head unit 32 based on the lowered position of the head 69) decreases from the conventional height S1 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 i 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 janθ0P Here, since l 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.

Further, the inclination angle θ of the arm 72 can be easily brought closer to the horizontal as the length L of the plate spring 7 is larger.
The neck bending effect can be enhanced.

Furthermore, in addition to the head loading spring 75, the upper limit regulating stopper 83 is provided, so that the arm 72
The upper limit position of can be regulated more reliably.

In this case, since the stopper 83 is provided on the carriage 68, the arm 7 attached to the same carriage
The upper limit position of 2 could be regulated with high precision.

Further, since the contact point (stomp point) M of the stopper 83 is set closer to the head than the lifting point H, the neck bending effect by the head loading spring 75 can be further promoted, and the head lifting force 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 head 69 is attached to the arm 72 supported via the plate spring 71, the pressure point K of the head loading 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 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.

Furthermore, on the 6th day of the carriage, a stopper 83 is provided that contacts the arm 72 at a position closer to the head than the lifting point H, so that the upper limit position of the arm 72 is reliably regulated and the leaf 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 I2 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 damper 82 is provided below 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, the damper 82 prevents the leaf spring from deforming downward. It is now possible to reliably prevent the plate spring 71 and the dispersion center 14 from coming into contact with each other (during loading) or from slipping.

Furthermore, the degree of freedom in design could be improved by making the leaf spring 7I long and thin to eliminate residual stress after displacement.

〔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 movable up and down via an elastic member or an elastic part, and a stopper for regulating the upper limit position of the arm is provided on the carriage. The height of the highest part of the head unit can be kept low when raising the head unit by a certain amount, and the upper limit position of the highest part of the head unit can be accurately regulated. ) A disk device is provided that can be downsized by reducing the amount of noise.

[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 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 showing the latch state of the latch member shown in FIG. 7. Figure, No. 9
The figure is a partial plan view showing the latch member in the unlatched state of FIG. 8, and FIG. 10 is a side view taken from line XX in FIG. 9.
Fig. 11 is a plan view of the disk rotation drive motor in Fig. 7, Fig. 12 is a reduced cross-sectional view taken along the line xn-xn in Fig. 11, and Fig. 13 is a view of the cassette guide as it rises in Fig. 4. FIG. 14 is a side view showing the state in which the cassette guide is lowered from FIG. FIG. 15 is a partially cutaway view showing the head unit; FIG. 17 is a cross-sectional view taken along the line X--X in FIG. 16; and FIG. 18 is a disk assembly according to the present invention! A partial side view showing the main part configuration of one embodiment of the present invention when the head is lowered;
Fig. 19 is a partial side view of the same part as Fig. 18, showing the state when the henode is raised, and Fig. 20 is a line XX-XX in Fig. 18.
FIG. 21 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--Base, 12--Cover, 4-disk cassent, 16-Front panel, 20 Cassette guide, 21--Guide pin, 22 Vertical groove, 23-
--Slide plate, 24 Disc rotation drive motor, 25- Tension spring, 26 -- Launch member, 27- Standing portion (slide plate), 28
---One cam pin, 32----Head unit, 33-
-1-, seek means, 34----head seek motor, 35--screw shaft, 36------
Guide bar, 42 ejector spring, 65-・-
Cam groove, 68 hend carriage, 69.70---head, 71---elastic member or elastic part (plate spring),
72--11-arm, 81-1--hand lifter part (cassette guide j), 82--stopper (projection), 83--stopper (carriage)
, C---one fulcrum, H---one lifting point, K---
--1 roto point, cost, p point, M--1111 stop point.

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 characterized in that the head is attached to an arm that is supported to be movable up and down, and that the carriage is provided with a stopper for regulating an upper limit position of the arm. (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.