JPH0479083A - Disk device - Google Patents

Abstract

PURPOSE:To reduce the overall height of the device and reduce its size by adding a stopper for restricting the upper-limit position of an arm fitted with a head. CONSTITUTION:A carriage 68 which is guided and supported by a head seeking means is fitted with the arm 72 through a leaf spring 71 so that the arm can be elevated about a fulcrum. An upper head 69 is mounted on its tip end part. This carriage 68 is provided with a projection part (stopper) 82 which abuts on the reverse surface of the leaf spring 71 in a head loading state and it functions as a stopper for stopping the leaf spring 71 from deforming downward. Further, a cassette guide 20 is provided with a stopper part 83 for restricting the upper-limit position of the arm 72 in addition to a head lifter part 81. Therefore, the height of the highest part of a head unit when the head 69 is elevated by a constant quantity can be suppressed low. Consequently, the overall height of the device is reduced to reduce the thickness and weight.

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 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. A disk serving as a recording medium is mounted so that it can be inserted and ejected, the disk is rotated by driving a motor, and recording or reproduction is performed while the head is moved in contact with or close to the disk. It is configured.

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 head loading means for loading and unloading the head with respect to the disk, etc. 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 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. The arm is configured to be biased (loaded) toward the disk and rotated upward (unloaded) 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 from the fulcrum in a substantially straight line at a constant angle, and the height of the upper end of the head unit including the arm member (because the head In order to avoid contact with the unit, 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 increases accordingly.

In addition, the upper limit position of the highest part of the head unit cannot be accurately regulated, and it is necessary to determine the height of the component storage portion such as the base with some margin relative 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 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, and also to raise the height of the head unit by a certain amount without increasing the number of parts. The upper limit position of the highest part of the head unit can be precisely regulated, and the overall height of the device (
An object of the present invention is to provide a disk device that can be made smaller by reducing its thickness.

[Means for solving problems]

The present invention provides a disc device that records or reproduces information on or from a disc by rotating a 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 supported so as to be movable up and down, and a cassette guide for raising and lowering the arm is provided with a stopper for regulating the upper limit position of the arm. Not only can the height of the highest part of the head unit be kept low when the head unit is raised by a certain amount, but also the upper limit position of the highest part of the head unit can be accurately regulated.
The present invention provides a disk device that can be made smaller by reducing the overall height (thickness) of the device.

〔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.
A cover 12 is attached to the top surface of 0.

Furthermore, a front panel 16 is attached to the front surface of the base 10, in which a cassette insertion opening 15 into which a disk cassette 14 is inserted and ejected 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 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 first disk device 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 cough 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 from the line Vl--Vl in the fourth section. It is.

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 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 FIG. 7, the lower side of the cassette guide 20 is formed with a cam portion for regulating the left-right position of the cassette guide and for raising and lowering the cassette guide. A plate 23 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 furthermore, has long projections (not shown) formed on the left and right sides of the slide plate. hole 29, base 10
By engaging the headed bottle 30 fixed to the
It is mounted 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
6) is always energized.

On the other hand, the slide plate 23 can be engaged with a latch member 26 to be described later, and in the engaged (launched) state, it is held in the rear position W (the position shown in FIG. 7) against the tension spring 25. There is.

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 landing 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 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), and when the launch member 26 is released and the slide plate is moved forward by the tension spring 25, the cassette guide 20 is landed at the disc loading position ( It is constructed as shown in Fig. 14).

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 its rotational force.

4 and 7, a head seek means (head moving means) 33 is provided within the base 1o.

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.

Incidentally, an umbilical 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 navel seek means 33 includes a motor (for example, a stevening motor) 34 as a driving source, a screw shaft 35 for converting the rotation of the motor into radial movement of the head unit 320, 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 parts before the disk cassette is installed (latch member engaged state = latched state), and FIG. 9 is a partial plan view showing the main part when the disk cassette is installed (latch member released state - latch released). 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 1O, 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 includes an arc-shaped retaining edge 43 and a sliding edge (
or a stomper 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 latch 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. .

When the disk cassette 14 is inserted (in the direction of arrow B) in the latched state shown in FIG. 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. Case 7) It becomes the attached state (lunch release state).

At this time, the launch member 26 is held at the ninth position 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 at the ninth position. 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 an open state (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 launch member 26 is rotated in the direction of arrow E (9th turn) by the ejector spring 42, and the push-out 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 joint sectional view taken along the 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.

In FIGS. 11 and 12, 51 is a stator yoke fixed to the base 10 with screws 52, and on the stator yoke are a bearing housing 55 holding bearings 53 and 54, stays 9-56, and a coil 57. Fixed side components such as are attached.

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 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 cough 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 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.

FIG. 13 and FIG. 14 are side views showing the operation of the cassette guide 20. FIG. The figure shows the state in which the cassette/cassette guide is lowered (when the disc 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 bins 21 provided at the center on 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 disc cassette 14 is inserted into the cassette insertion slot 15 of the cassette 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 becomes a tension buff,
25 in the direction of arrow C (direction toward the front panel 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 lowering 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.

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

The head unit 32 (or carrier, white 8) has a shape having a predetermined length in the radial direction, as shown, so that each head 69, 70 can perform recording and reproduction of 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 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 throat 69 and the lower head 7o 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 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 in the radial inner and outer positions of the head unit 32.

Further, a two-dot chain line 24A indicates the relative position of the disk drive motor 24 when the head unit 32 moves to the innermost position.

By moving the carriage 68 in the radial direction by the motor 34, a seek operation of the head unit 32 is performed.

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, a seek motor (for example, a stepping motor) 34 is attached to the rear wall 10A of the base 10, and both ends of a screw shaft 35, which is its output shaft, are connected to the base 10. The 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 temporary spring 78 is attached to the lower surface of the overhanging part 77 of the carriage 68 to be 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 6th) 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 track. will be carried out.

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 6,
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.
FIG. 16 shows a state where the drawer 9.70 is at the innermost track position, and a chain double-dashed line 32 in FIG. 16 shows the head unit 32 when the head is at 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 landing position (loading), and
Figure 9 shows the head in the raised position (unloaded).

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

18 to 20, the head 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 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 tip of the carriage 6B 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,
172 to 1/ of the length between the fulcrum G and the head 69, which will be described later.
The length is set to be relatively long.

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

The root (proximal end) of the 68 examples of the carrier ji 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
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 of the base end of the first side. This is the point on which a pushing force sometimes acts, that is, the lifting/lowering point H of the arm.

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

On the other hand, the support member 73 fixed on the carriage 6th has
A head load spring (
In the illustrated example, a recoil spring 75 is attached.

Note that the support member 73 and the plate spring 71 are fixed on the carriage 68 by screws 74 and rotation prevention means 84.

The herad load 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 71 in the 185th hennodrome loading state.

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 plate 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.

Further, the cassette guide 20 is provided with a stopper part 83 for regulating the upper limit position of the arm 72 in addition to the hen lifter part 81.

On the other hand, stop pins 85 that can come into contact with the stopper part 83 of the cassette guide 20 are provided at predetermined positions on both sides of the arm 72 (in the illustrated example, approximately the same front-back position as the head 69). .

The position of the stop pin 85, that is, the arm 7
The abutment possible position (stop point) M for regulating the upper limit position of No. 2 is from the lifting point H to the head 69
This is set in the example position.

In the illustrated example, the stop point M is set further toward the head than the load point (in the illustrated example, it is set at the same position I of the horizontal head 69, but this is the lifting point). 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.

Further, the plate spring 71 can be formed of various elastic members such as metal or plastic as long as it has elasticity in the vertical direction. It can also be formed with a 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 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 head 69 is attached to the disk device, and the cassette guide 20 for raising and lowering the arm 72 is provided with a stopper 83 for regulating the upper limit position of the arm 72. There is.

Further, in the above configuration, the stopper 83 is configured 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. 21 is an explanatory diagram schematically showing the head mounting operation of the head unit 32 described in FIGS. 18 to 20.

In FIG. 21, the solid line indicates the state where the arm 72 is in the landing position (FIG. 18), the chain line indicates the state a of this embodiment (FIG. 19) where the arm 72 is in the raised position, and the two-dot chain line indicates It shows the raised state of the arm in the conventional Herad Uni 7).

In addition, in the conventional head unit, the head support member corresponding to the arm 72 and the plate spring 71 is tilted substantially linearly ((I
I oblique angle θI).

In this embodiment, when the arm 72 is in the raised position (head unloading position), the pressure point (load point) K is the head 69 from the lifting force application point (lifting point) H by the cassette guide 20.
Since the arm 72 is set on the side, a counterclockwise moment will act 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 a head-down direction approaching horizontal, and its inclination angle decreases from the conventional angle θ to an angle θ2, and the highest position of the arm 72 (in the illustrated example, the lowered position of the hendro 9 is referenced). The highest position of the head unit 32) is reduced from the conventional height Sl 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 janθ0P 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.

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 existing cassette guide 20, the stopper means can be constructed with a simple structure without increasing the number of parts.

Further, since the contact point (stop 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 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 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 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.

Furthermore, a stopper 83 is provided on a part of the cassette guide 20 for raising and lowering the arm 72, which abuts at a position closer to the head than the raising and lowering point H of the arm 72, thereby reliably regulating the upper limit position of the arm 72 and By further promoting the bending effect of the plate huff 71 in the head-down direction, the maximum height S of the arm 72 could be reduced to -1i1.

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 the disk device thinner. was completed.

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, it is possible to prevent the leaf spring from deforming downward when the head is lowered (loaded). It is now possible to reliably prevent contact or slippage between the plate spring 71 and the disk cassette 14 etc. during the above-mentioned operation.

Furthermore, the degree of freedom in design could be improved by making the leaf spring 71 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 portion 83, a member that rotates, such as a rotatable roller, may be provided in place of the stop pin 85.

[Effects of the Invention] As is clear from the above description, according to the present invention, information can be recorded on the disk by rotating the disk as a recording medium and moving the head on the carriage in a predetermined direction. Alternatively, in a disc device that performs playback, the head is attached to an arm supported so as to be movable up and down via an elastic member or an elastic part, and a cassette guide for raising and lowering the arm regulates the upper limit position of the arm. Since the structure is equipped 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 upper limit position of the highest part of the head unit can be accurately regulated. Accordingly, a disk device is provided that can reduce the overall height (thickness) of the device and make it thinner and lighter.

[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. 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 Figure 7 is a plan view of the disk device shown in Figure 4 with the cassette guide removed;
FIG. 9 is a partial plan view showing the latch member shown in the figure in a latched state, FIG. 9 is a partial plan view showing the launch member in FIG. 8 in the unlatched state, and FIG. 10 is a side view taken from line XX in FIG. 11 is a plan view of the disk rotation drive motor in FIG. 7, FIG. 12 is a longitudinal sectional view taken along line xn-xn in FIG. 11, and FIG. 13 is a plan view of the cassette guide in FIG. 4. Fig. 14 is a side view showing the state in which the cassette guide is lowered from Fig. 13. Fig. 15 is a side view of the head unilateral in Fig. 4. Fig. 16 is a side view of the head in Fig. 4V. 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 seek means and the head unit in FIG. 15. FIG. FIG. 19 is a partial side view showing the main structure of one embodiment when the head is lowered; FIG. 19 is a partial side view showing the same part as FIG. 18 when the hen is raised; FIG. 20 is FIG. FIG. 21, a plan view taken along the line XX-XX in the center, is a schematic diagram for explaining the elevating motion of the plate springs and arms in FIG. 18. Below, symbols representing main components in the drawings are listed. i o------One base, 12---One cover,
14 disk power cents, 16--front panel, 2
0 center guide, 21・----guide pin, 22
Vertical groove, 23-111--slide plate, 24-disc rotation drive motor, 26-----Lanoch member, 28.65--cam mechanism, 32--1 head unit, 33---= Head seek means, 34--head seek motor, 35--screw shaft, 36--
Guide bar, 42...-゛°' Ejector spring, 68...-Herad carriage, 69.70--
Head, 7L---Elastic member or elastic part (plate spring), 72---Arm, 81---Part of head lifter (cassette guide), 82---Stopper (protrusion) part), 83---part of stopper (cassette guide), 85-1---stomp bin, G.-
1----Fully point, H-・-lifting point, K----・
-Load point, J-...stop point (arm), M--stop point. Figure 4 14-1-1. -1-□-6--,” Figure 11 Figure 12

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 supported so as to be movable up and down, and a cassette guide for raising and lowering the arm 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.