JP2001222850A - Disk driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a device while maintaining an assemblability. SOLUTION: A lift operation lever 5 moved by driving force is provided. The lift operation lever 5 is provided with a holder 7 displaced between the inserting/pulling-out position of a cartridge case 20 and the reproducing position of a disk 20a in the cartridge case 20. A groove part 5a1 is provided to be directed along the side face of the holder 7 when the holder 7 is in the reproducing position. A lift linking lever 8 is provided, to which driving force from the lift operation lever 5 is transmitted. In the lift linking lever 8, an arm part 8b is formed so as to be fitted in the groove part 5a1 and also inserted into the guiding groove part 20g2 of the cartridge case 20. The arm part 8b contributes to miniaturization by preventing the outward protrusion of a base chassis 1 while securing the transmission of the driving force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device for reproducing or recording a disk stored in a cartridge case having a guide groove parallel to the insertion direction from an end surface in an insertion direction on a side surface. The present invention relates to a disk drive device having a coupling mechanism between a first moving member supported by a base and a second moving member supported by a base and supported by a holder for moving a cartridge case between an insertion / removal position and a reproduction position. Things.

[0002]

2. Description of the Related Art At present, a mini-disc which selectively uses a magneto-optical disc as a recording medium on which an information signal can be overwritten and an optical disc as a read-only recording medium as a recording medium for the information signal. (MD) and other disk drive devices are known.

A disk such as a magneto-optical disk or an optical disk used in this disk drive device is housed in a disk cartridge and is housed in a disk cartridge in order to prevent at least the signal recording surface of the disk from being damaged or adhered to dust. It is inserted into a disk drive and used as it is.

A disk drive device using a disk cartridge is provided with a holder for holding the disk cartridge, and the holder is moved from a raised position where the disk cartridge is inserted or ejected to a lowered position where recording / reproduction is performed on a disk in the disk cartridge. The disk cartridge inserted and held in the holder is mounted on a base chassis having a recording / reproducing unit by rotating / moving (rotating) the disk cartridge.

In such a disk drive device, an optical pickup device that irradiates a laser beam onto a signal recording surface so that a recordable magneto-optical disk can be used,
There is provided a magnetic head device for applying a magnetic field according to recording information from a surface opposite to the irradiation position of the laser light.

The magnetic head of such a magnetic head device, when the disk cartridge is inserted into and removed from the holder, is set at a retracted position where contact with the disk cartridge is avoided, while recording information. Sometimes, in order to increase the applied magnetic field, the optical disk is moved to a position close to or in contact with the surface of the magneto-optical disk through the recording opening of the disk cartridge. For this reason, the holder is provided with a magnetic head moving member for moving the magnetic head during recording, while the base chassis is provided with a driving force from a driving source provided in the base chassis. A moving member for transmitting to the member is provided.

By the way, discs such as magneto-optical discs and optical discs, which can record information signals at high density, are used with smaller diameters. For example, there is a magneto-optical disk having a diameter of about 64 mm and an MD which is an optical disk. A device using such a miniaturized MD as a recording medium itself has also been miniaturized, and a device miniaturized to a portable size has been proposed.

In this type of portable disk drive, in order to improve the convenience of carrying,
There is a demand for further reduction in thickness and size. Thinner,
As for miniaturization, a method of a coupling mechanism for transmitting a driving force from a driving source provided on a base chassis to a magnetic head moving member supported by a holder is naturally necessary.

A conventional coupling mechanism of the disk drive will be described below with reference to FIGS. First, in the above disk drive device,
The base chassis 101 holds the holder 10 during recording / reproduction.
A cartridge mounting portion for positioning and mounting the cartridge case 110 held by the cartridge case 110;
A disk rotating device that clamps and rotates the disk housed in the optical disk, a semiconductor laser as a light source, an optical system for guiding the laser light of the semiconductor laser to the objective lens, a light receiving element, and return light from the objective lens (reflected light from the disk )
And an optical pickup device that incorporates focusing / tracking control components and the like.

A driving plate 103 is supported on the base chassis 101 so as to be movable in the AB direction, and is provided so as to reciprocate in the AB direction by a driving force from a driving source such as a motor (not shown). I have. The holder 102 is a fulcrum shaft 101 provided on the rear side of the base chassis 101.
a, the base chassis 1 is rotatable in the I-J direction.
01 supported.

A passive operation plate 104 as a magnetic head moving member is supported on the holder 102 so as to be movable in the AB direction. A direction and D of drive plate 103
Bending portion 103a perpendicular to the E direction is located near the tip of the direction.
Is formed with a square hole 103b extending in the AB direction at the center of the base of the bent portion 103a.

Further, a plate-shaped bent portion 104a orthogonal to the F direction is formed at the tip of the passive operation plate 104 in the D direction. Since the vicinity of the tip of the bent portion 104a is fitted into the square hole 103b of the drive plate 103,
The drive plate 103 and the passive operation plate 104 are connected to each other. Further, by such connection by fitting, the drive plate 103 and the passive operation plate 104 are
For the base chassis 101 and the holder 102,
Each can be easily assembled.

The bending height of the bend 104a of the passive operation plate 104 is such that vibrations and vibrations occur when the holder 102 rotates in the direction I at the disk insertion / ejection position (insertion / removal position) as shown in FIG. The length is set so that the connection between the drive plate 103 and the passive operation plate 104 is not disconnected due to play or the like. Accordingly, in conjunction with the movement of the drive plate 103 in the AB direction (the A direction movement position is shown in FIG. 18 and the B direction movement position is shown in FIG. 19), the passive operation plate 104 moves the holder 1.
02.

[0014]

However, in the above-mentioned conventional disk drive device, there is a problem that the whole device is enlarged as described below.

That is, in the coupling mechanism in the conventional disk drive device, the holder 102 rotates between the insertion / removal position of the cartridge case 110 and the reproduction position of the disk, so that as shown in FIG. Drive plate 103 and passive operation plate 1 at the insertion / removal position
In order to prevent disconnection from the holder 104 at the position of the bent portion 104a, the length of the bent portion 104a of the passive operation plate 104, which engages with the square hole 103b of the drive plate 103, is set so as not to be disconnected. It is necessary to increase the length by an amount obtained by adding the amount of rotation and the allowance for vibration, backlash and the like.

Accordingly, the holder 1 is located at the reproduction position of the disc.
When the user turns 02, the lower end of the bent portion 104 a, which is a connection portion of the passive operation plate 104, comes to a position protruding considerably below the base chassis 101.

In recent years, portable disk drive devices using a small recording medium such as a mini disk have
In order to reduce the size of the entire device, electric circuit components and a battery used as a power supply of the electric circuit are arranged immediately below the base chassis 101.

For this reason, in the conventional coupling mechanism, the tip of the bent portion 104a of the passive operation plate 104 is
Because it is set to extend well below 1,
Since the space is lost and the space corresponding to the moving amount of the passive operation plate 104 is also lost, there is a problem that the entire apparatus is enlarged.

[0019]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the disk drive device of the present invention comprises a housing-like case for rotatably storing a reproducible disk for inserting and removing the case. Is provided on the side surface of the case, and the holder for holding the case facing the side surface of the case is displaced between the insertion / removal position of the case and the reproduction position on the base. The first moving member to which the driving force is transmitted is provided so as to be movably supported by the base, and the second moving member movably supported by the holder is provided from the first moving member. The driving force is provided to transmit when the holder is at the playback position, and the first moving member is provided with a groove portion extending in a direction along a side surface of the holder when the holder is at the playback position, The second moving member has an arm It is characterized in that it is formed so as also to be inserted into the guide groove of the casing while being fitted into the above groove.

According to the above configuration, the groove is formed in the first moving member, and the arm formed in the second moving member is fitted into the groove and inserted into the guide groove of the case, so that the base is formed. In the transmission of the driving force between the first moving member supported by the table and the second moving member supported by the holder, the size is increased due to, for example, downward projection of the base due to displacement operation of the holder. The coupling mechanism can be reduced in size, which can contribute to the reduction in the size of the entire device.

In the above disk drive device, the arm portion is fitted in the groove portion and is connected to the first arm portion to be inserted into the guide groove, and the groove portion faces the groove from outside. Preferably, the width of the second arm is set to be larger than the width of the groove.

According to the above configuration, the width of the second arm formed on the second moving member is made larger than the width of the groove formed on the first moving member, so that the second arm is formed. ,
Since the disengagement between the groove of the first moving member and the first arm of the second moving member can be prevented, the second arm can be located closer to the groove. The coupling mechanism that transmits the driving force can be made smaller,
It is possible to contribute to downsizing of the entire device.

In the above-mentioned disk drive device, an inwardly bent portion to be inserted into the guide groove is formed on the inner side surface of the holder, at a position closer to the insertion opening of the case than the first arm portion. It is desirable.

According to the above configuration, the first arm portion of the second moving member and the inwardly bent portion of the holder are formed so as to be inserted into the guide groove, and the bent portion is formed in the second direction. 1
By forming from the arm to the case insertion port side of the holder, due to the dimensional variation of the thickness of the case, the backlash in the thickness direction of the case in the holder, and the dimensional variation of the shape and position of the guide groove of the case When the case is inserted into the holder, the bent portion is inserted into the guide groove in advance, and the case is guided (guided). Therefore, the case is brought into contact with the case and the first arm portion. It is possible to avoid inconveniences such as an insertion obstruction and an unexpected displacement of the second moving member.

When a cartridge case for a mini disk (MD) is used as a case, the case has a rectangular shape having a depth of 68 mm in the insertion direction and 72 mm in a width direction perpendicular to the insertion direction. And the width direction is only about 4 mm larger. For this reason, it is conceivable that the operator erroneously inserts the case into the holder from an end surface orthogonal to the insertion direction.

Since the guide groove is not formed on the end face in the insertion / removal direction, there is no guide groove on the side surface of the case in the case of this erroneous insertion. Therefore, the first of the second moving members
There is a high possibility that the second moving member may be damaged by contact with the arm.

However, by positioning the first arm of the second moving member behind the bent portion of the holder (opposite to the insertion opening) as in the above-described configuration, the second moving member is erroneously inserted by the operator. Can be prevented from being damaged.

In the above-mentioned disk drive device, it is preferable that the holder is provided with a cut-and-raised portion so that the second moving member can be loosely fitted between the holder and the holder.

According to the above construction, the cut-and-raised portion for loosely fitting the second moving member between the holder and the holder is provided on the holder, so that the cut-and-raised portion is inserted into the groove provided on the side surface of the cartridge case. The rattling of the one arm portion is suppressed, and the variation in the position of the first arm portion is stabilized, and the contact between the case and the first arm portion at the time of inserting the case can be reliably prevented. And damage to the second moving member can be avoided.

[0030] In the above disk drive device, it is preferable that each inner wall of the groove is formed so as to be along the direction of displacement of the holder. According to the above configuration, the shape of the U-shaped groove of the first moving member is formed along the direction of displacement of the holder, so that the second movement by the displacement operation of the holder is performed.
It is possible to prevent the displacement of the moving member and to provide a highly accurate connection.

When the second moving member is displaced by the displacement of the holder, when the first arm moves in the groove,
Although a side pressure is generated at the time of displacement, in the above configuration, it is possible to reduce a sliding load when the first arm moves in the groove due to the displacement of the second moving member, and the displacement operation of the holder can be performed. Can be reduced.

In the above disk drive device, the holder is provided so that the case is displaced between the insertion / removal position and the reproduction position by rotation, and each inner wall of the groove portion is displaced in the displacement direction of the holder. It may be formed so as to follow.

According to the above configuration, the shape of the groove of the first moving member is set at the position of the rotation fulcrum of the holder with respect to the rotation fulcrum of the holder, and the first arm fitted into the groove when the case is inserted and removed. The shape of the groove portion follows the shape of the trajectory of the first arm portion when the holder rotates, by forming the arc shape with the radius being the projection distance of the holder on the rotation plane with respect to the position of the portion. As a result, it is possible to prevent the displacement of the second moving member due to the turning operation of the holder, and it is possible to provide a highly accurate connection.

In the above configuration, when the second moving member is displaced by the rotation of the holder, a lateral pressure is generated when the first arm moves in the groove. Therefore,
With the above configuration, it is possible to reduce the sliding load when the first arm moves in the groove due to the displacement of the second moving member, and it is possible to reduce the turning load of the turning operation of the holder. It becomes possible.

In the above-mentioned disk drive device, a magnetic head for recording information on the disk by generating a magnetic field is provided, and the magnetic head is positioned near the disk at the reproducing position of the holder.
And a head displacing means for displacing the magnetic head from a first position to a second position which is farther from the disk than the first position, so that the magnetic head is displaced by a driving force from the second moving member. And a cam portion for displacing the head displacement means is provided in the second
At the end of the moving member opposite to the arm, an inclined portion, and a flat portion following the inclined portion that holds the magnetic head at the second position and is substantially parallel to the surface of the disk. The head displacement means is provided with an engagement surface for engaging with the cam portion, and when the magnetic head is in the second position, the engagement surface of the head displacement means is substantially equal to the surface of the disk. Preferably, they are formed so as to be parallel.

According to the above configuration, at the second position where the head displacement means is rotated to the upper position, the engagement surface of the head displacement means is formed so as to be parallel to the disk, and is parallel to the disk. It is parallel to the flat part of the cam part of the formed second moving member. Accordingly, there is no influence on the amount of rotation of the head displacement means due to the displacement of the amount of movement of the second moving member, and the second position where the magnetic head is separated from the disk from the first position is stabilized. .

Further, the engagement surface of the head displacement means is formed so as to be parallel to the disk, so that the height of the engagement surface of the head displacement means is reduced when the magnetic head is at the second position. It is possible to arrange the magnetic head closer to the magnetic head where the amount of rotation is large because it is away from the fulcrum of the head displacement means.
It is possible to improve the accuracy of the retracted position, which is the second position of the magnetic head, due to the variation in parts.

Further, in the above configuration, the second structure of the magnetic head
Since the retracted position is stable, the retracted position of the magnetic head can be arranged near the case, and the height of the magnetic head can be reduced, contributing to the reduction in the thickness of the entire device. Was.

In the disk drive device of the present invention, the case is provided with a shutter for opening and closing a window for exposing the disk, and a side surface of the holder is engaged with the shutter to close the shutter in the closing direction. A shutter locking spring having an elastic member biasing the
A first urging portion having elasticity in a thickness direction of the disk at one end of the shutter locking spring, and a second urging portion having elasticity in a radial direction of the disk and having the first urging portion at a distal end portion It is desirable that the first urging portion applies a urging force in the displacement direction of the head displacement means.

According to the above construction, the member for applying the biasing force of the head displacing means is separately provided by biasing the head displacing means in the direction of displacement by the first biasing portion provided on the shutter locking spring. This eliminates the necessity and reduces the number of parts.

Since the holder and other parts located in the vicinity of the other head displacing means need to have some rigidity, it is difficult to make the plate thickness thinner than the shutter locking spring. Since the spring constant increases, the load on the head displacement means increases.

Therefore, by setting the shutter locking spring capable of reducing the plate thickness so as to apply the bias in the displacement direction of the head displacement means, it is possible to reduce the load in the displacement direction of the magnetic head. It became.

Further, since the first biasing portion is formed at the tip of the second biasing portion having elasticity in the radial direction of the disk, the first biasing portion also has elasticity in the radial direction. Thus, it is possible to improve the assemblability when the first urging portion is engaged with the head displacement means.

[0044]

FIG. 1 shows an embodiment of the present invention.
The following is a description based on FIG. 17.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, in the disk drive device according to the present invention, a magneto-optical disk capable of superimposing an information signal and a read-only optical disk can be selectively mounted as a recording medium of an information signal such as a music signal. ing. In the present embodiment, as shown in FIG. 1, the magneto-optical disk will be described as a disk 20a, but the present invention is also applicable to a read-only optical disk described later.

The disk drive device of the present invention has a housing-like cartridge case 20 for rotatably storing a reproducible disk 20a, and a holder 7 into which the cartridge case 20 is inserted and held. The aforementioned cartridge case 20, in the cartridge case 20, inserting each parallel to the insertion direction than the end face guide groove 20 g ₁ of the cartridge case 20 on each side, 20 g ₂ are respectively formed with respect to the insertion direction.

The holder 7 holds the cartridge case 2
The insertion slot 71 for inserting the cartridge case 20 into the holder 7 or removing the cartridge case 20 from the holder 7 easily with the insertion slot 7l of the base chassis 1 being substantially parallel to the base chassis 1. It is attached to the base chassis 1 so as to rotate between a recording / reproduction / reproduction position (loading position). The holder 7 has a bottom surface 7n as an insertion guide for the cartridge case 20.

As described above, the recordable / reproducible disk 20a used in the disk drive device is housed in the disk cartridge 20 in order to prevent at least the signal recording surface of the disk 20a from being damaged and the dust from adhering thereto. It is designed to be mounted on the disk drive while being stored in the cartridge 20.

In the disk drive, a lift operation lever 5 and a lift connection lever 8 are provided to scan the disk 20a by applying a light beam or a magnetic field from both sides.

The lift operation lever 5 is supported on the base chassis 1 so as to be able to reciprocate in the AB direction, which is substantially the same direction as the insertion / removal direction of the cartridge case 20, and has a substantially distal end in the movement direction. And a U-shaped groove 5a ₁ located near the side of the cartridge case 20.
Are provided upright along the side surface of the holder 7.

The lift connecting lever 8 is rotatably supported by the holder 7 and has an arm 8b at an end thereof. In addition, the arm 8b
The tip of the cartridge case 20 is fitted into the groove 5 a _1, and the guide groove 20 g on the side of the cartridge case 20.
It is set to be inserted into ₂ .

[0052] The shape of the groove 5a ₁ is not limited to the U-shape, bifurcated at the distal end portion, and fitting the tip portion of the arm portion 8b is at the disk 20a is playback position Any connection shape is possible as long as the driving force can be transmitted from the lift operation lever 5 to the lift connection lever 8 without waste. For example, the connection portion may have a tapered portion such that the interval gradually increases toward the tip. .

[0053] disk drive apparatus according to the present invention, by inserting a play portion for connecting the arm portion 8b for stabilization and ensuring of the coupling mechanism in the guide groove 20 g _1, lift operation The enlargement of the coupling mechanism for transmitting the driving force between the lever 5 and the lift coupling lever 8 can be avoided conventionally.

In each of the drawings, arrow A indicates the rear direction of the apparatus main body (the direction in which the disc cartridge 20 is inserted), and arrow B
Are the forward direction of the apparatus (the direction in which the disc cartridge 20 is taken out), arrows C and D are the right and left directions as viewed from the front of the apparatus main body (the side where the disc cartridge 20 is inserted), and arrows E and F are the directions of the apparatus body. Up and down directions (upward means from the base chassis 1 to the holder 7 on the base chassis 1).
And the downward direction indicate the opposite direction to the upward direction).

Arrows G and H indicate clockwise and counterclockwise directions when viewed from above the main body (a position facing the base chassis 1 with the holder 7 interposed), and arrows I and J indicate clockwise and counterclockwise when viewed from the right side of the main body. Each direction is shown. In other words, the direction I means that the holder 7 moves from the reproduction position of the disc 20a of the disc cartridge 20 to the disc cartridge 2
0 indicates a direction of rotational movement to the insertion / removal position, and the J direction is a direction of rotational movement in a direction opposite to the I direction.

Next, a disk cartridge 20 containing a disk 20a which is a magneto-optical disk used in a disk drive device to which the coupling mechanism according to the present invention is applied.
2 and 3 show the disk cartridge 21 containing the optical disk 21a, and will be described below.

The disk cartridge 20 is inserted into and removed from the holder 7 with the directions indicated by arrows A and B in FIGS. 2 and 3 as insertion and removal directions. As shown in FIG. 2, a disc cartridge 20 containing a disc 20a capable of superimposing recording of an information signal is provided.
a cartridge body 2 having an outer diameter of a substantially inscribed circle
0b.

As shown in FIG. 2, on the upper surface side of the cartridge main body 20b, a recording opening 20c for exposing (exposing) a part of the signal recording area of the stored disk 11 over the inner and outer peripheries. ₂ is formed, and a recording opening 20c is formed on the lower surface side of the cartridge body 20b.
₂ opposite the, and likewise opening 20c ₁ for recording and reproduction for exposing a portion of the signal recording area of the disk 20a outwardly is formed.

Further, as shown in FIG. 2, a turntable constituting a disk rotating device described later, which rotates the disk 20a, enters into the center of the lower surface side of the cartridge main body 20b, and contacts the disk 20a. A circular central opening 20d for contact is formed.

Then, the recording type disk cartridge 2
The cartridge body 20b constituting the 0, attached movably shutter member 20e for opening and closing the opening 20c _1, 20c ₂ for recording and / or reproducing is provided on both upper and lower surfaces are in A-B direction of the cartridge body 20b Have been. The shutter member 20e thus configured is attached to the front side of the cartridge body 20b so as to cover the recording and / or reproducing openings 20c ₁ and 20c ₂ and reciprocates along the AB direction. Thus, the openings 20c ₁ and 20c ₂ are opened and closed.

On the right side of the cartridge body 20b, the insertion direction (A-B)
Are guided groove 20 g ₁ is formed parallel to the direction). The shutter member 20e, by being engaged with engagement pieces provided on the right side to the right side surface of the guide groove portion 20 g _1, moves stably guided by the guide groove portion 20 g ₁ is assured.

Further, a guide groove 20g ₂ is provided at the rear of the left side surface of the cartridge body 20b in parallel with the insertion direction from the insertion end.
Are formed. Each guide groove 20g ₁ , 20g ₂
Are respectively opened at the insertion end 20j, which is the rear end face of the cartridge body 20b, and the insertion end 2
0j, and sequentially toward the insertion end 20j,
It has a tapered shape with an increased width and depth. In addition, positioning holes 20h and 20i for positioning the cartridge main body 20b in the apparatus are formed at respective positions along the front-rear direction on the lower surface side of the cartridge main body 20b.

Recording / playback type disk cartridge 20
The disk cartridges 20 and 21 are magneto-optical recording / reproducing at the center of the side of the shutter member 20e attached to the disk cartridge 21 and the side of the shutter member 21e attached to the read-only disk cartridge 21 (see FIG. 3). When mounted on the apparatus, the shutter members 20e, 21
e in the open position and the disk cartridge 2
When the ejection operation of the shutter members 0 and 21 is performed,
e, 21e of the cartridge body 20b, the engaging holes 20e _1, 21e ₂ the locking member provided on the device side to be engaged so as to move relative to the engagement are provided to 21b.

[0064] The cartridge body 20b, the shutter member 20e on the right side of the inside 21b, when a 21e is closed, the shutter member 20e, the lock lever 20f to restrict the movement of 21e, 21f on the right side surface of the guide groove portion 20 g ₁ The shutter member 20 is formed and rotated in the G direction,
The movement restrictions on e and 21e are released.

Each of the disk cartridges 20, 21
Center holes 20a ₁ and 21a ₁ are respectively formed in the center portions of the disk 20a and the optical disk 21a housed in the disk drive, and the disk rotation of the recording / reproducing apparatus is performed by closing the center holes 20a ₁ and 21a _1. Hubs 20a ₂ and 21a ₂ are provided for clamping the device.

In the following embodiment, a description will be given using a recording / reproducing type cartridge case 20. However, a case where a reproduction-only type cartridge case 21 is used can be similarly used. Also, the disk 20a
The optical disk 21a is also described below as the disk 20a unless otherwise specified.

FIGS. 1 and 4 to 6 show a disk drive device to which the coupling mechanism according to the invention using the disk cartridge 20 configured as described above is applied, and will be described in detail below.

As shown in FIG. 1, this disk drive device is reduced in size to a portable size, and has a flat rectangular shape disposed in a casing (not shown) constituting a device main body. 1 is provided.

The base chassis 1 rotatably supports a holder 7 into which a disk cartridge 20 is inserted and held, and incorporates a magnetic head device 12 and an optical pickup device 2 constituting a recording / reproducing unit. Disk cartridge 2 held in 7
The disk rotating device 3 for rotating the disk 20a stored in the disk 20 is incorporated.

When the holder 7 is at the reproducing position, the magnetic head device 12 is mounted on the base chassis 1 and the holder 7.
A magnetic head elevating mechanism, which will be described later, is moved up and down with respect to the cartridge case 20, that is, the magnetic head 12a of the magnetic head device 12 is moved away from or close to the disk 20a of the cartridge case 20.

The components of the magnetic head elevating mechanism and the coupling relationship will be described in detail below with reference to FIG. 1 and FIGS. 4 to 6. The respective configurations and coupling relationships of the base chassis 1, the optical pickup device 2, the disk rotating device 3, and a first moving member (hereinafter, lift operation lever) 5, which is a part of the magnetic head lifting / lowering mechanism, are described in perspective of the disk drive device. FIG. 4, which is a diagram, FIG. 5, which is a rear view of the disk drive device, and FIG. 6, which is a perspective view of a main portion of the disk drive device, are described in detail below.

In the base chassis 1, an opening 1a of an appropriate size is formed on the right side of the plane in consideration of a moving range of a disk rotating device 3 described later and an optical pickup device 2 described later, and before and after the opening 1a. Cartridge body 20
The guide pins 1d and 1e are formed to fit in the positioning holes 20h and 20i of FIG.

Bends for holding the holder 7 so as to be rotatable are formed on the left and right sides (rear side) of the base chassis 1, respectively. A rectangular plate-shaped holder fulcrum end 1b,
1c are formed so as to extend in a direction parallel to the surface of the base chassis 1. Further, a bent portion 1i is provided on the base chassis 1 behind the holder fulcrum end 1c.
Is formed to stand upright.

Further, guide grooves 1 f, 1 g ₁ , 1 g ₂ are formed on the front surface of the base chassis 1 at the center and on the left and right sides, and a step bending portion 1 h is formed on the left side of the guide grooves 1 g ₁ , 1 g _2.
1 , 1h ₂ are formed.

The above-described disk rotating device 3 has a disk 20
a is fixed to the base chassis 1 with a spindle motor 3a in which a turntable 3b that chucks a and integrally rotates with the spindle motor 3a. The turntable 3b is set to protrude from the position of the opening 1a toward the upper surface of the base chassis 1. Also, in the base chassis 1,
An optical pickup device 2 having an optical head is mounted so that the signal recording surface of a disk 20a mounted on a turntable 3b can be moved in the radial direction.

The optical pickup device 2 incorporates a light source such as a semiconductor laser that emits a light beam applied to the disk 20a on the turntable 3b.
The light beam emitted from the light source is focused to form a disc 20a.
An optical component for guiding the objective lens 2a to irradiate the object lens, an optical block including a photodetector for detecting a return light beam reflected from the disk 20a, and an objective lens 2a based on a focus error signal and a tracking error signal. A two-axis actuator for driving displacement in a focusing direction parallel to the optical axis of the objective lens 2a and a tracking direction in a plane direction orthogonal to the optical axis of the objective lens 2a.

The optical pickup device 2 is supported movably in the radial direction of the disk 20a on the turntable 3b via a guide shaft 16 and a guide portion arranged in parallel with each other on the lower surface side of the base chassis 1. At the same time, it is rotationally driven by a feed motor 19a.

Driving means for the optical pickup device 2 in the disk radial direction are provided at a driving screw 17 for engaging and pressing a driving grip 2b attached to the optical pickup device 2 to a screw portion, and at an end of the driving screw 17. A worm wheel gear portion (not shown), a feed motor block 19 including a gear 19b and a motor 19a for driving the gear 19b, a large gear (flat gear) portion meshing with the motor gear 19b, and a worm wheel (not shown) at the tip of the drive screw 17; And an intermediate gear 18 comprising a worm portion that meshes.

The driving force of the feed motor 19a is
b, transmitted to the drive screw 17 via the intermediate gear 18, and the optical pickup device 2 is slid in the direction of arrow CD by rotation of the drive screw 17. The sliding direction of the optical pickup device 2 is determined by the rotation direction of the feed motor 19a. At this time, the optical pickup device 2
Opening 1 in which objective lens 2a is formed in base chassis 1
a, it faces the disk 20a on the turntable 3b.

When the feed motor 19a is driven and the feed screw 17 is driven to rotate, the optical pickup device 2 is guided by the guide shaft 16 and the guide portion to feed the disk 20a on the turntable 3b in the radial direction. Then, the signal recording surface of the disk 20a is scanned by the light beam emitted through the objective lens 2a.

Next, the connection mechanism will be described. First, the lift operation lever 5 having a substantially rectangular plate shape is attached along the back surface of the base chassis 1. In the base chassis 1, A-B-extending the guide grooves 1f, 1 g _1, stepped guide shaft 5b of the lift operating lever 5 in 1 g _2, and the guide boss 5c _1, 5c ₂ to fit each other, and the base A- in the chassis 1
The step bending portions 1h ₁ and 1h ₂ extending in the direction B and the step bending portions 5d ₁ and 5d _{2 of the} lift operation lever 5 are engaged with each other. From this, the lift operation lever 5 is
The movement of the base chassis 1 in the CD and EF directions is restricted, and the base chassis 1 is mounted on the back surface of the base chassis 1 so as to be slidable only in the AB direction.

With these fittings and engagements, the lift operation lever 5 is supported in the EF direction (the thickness direction of the base chassis 1) at a thickness substantially equal to the sum of the thickness of the lift operation lever 5 and the base chassis 1. Will be done. A rack 5 e for transmitting a driving force to the lift operation lever 5 is formed in the front part of the lift operation lever 5 along the AB direction.

A rectangular plate-shaped bent portion 5 is provided at a rear portion of the lift operation lever 5 (a position near the holder fulcrum end 1b).
a extends in the EF direction at right angles to the main body of the lift operation lever 5, that is, in the front surface direction of the base chassis 1, in other words, along the side surface of the holder 7 at the reproduction position, that is, the bent portion 5 a The front surface is formed so as to face along the side of the cartridge case 20 in the holder 7 at the reproduction position. The bent portion 5a is preferably made of an elastic member such as a metal plate or a plastic plate.

The distal end of the bent portion 5a is bifurcated at the distal end for transmitting the driving force of the lift operating lever 5 to the lift connecting lever 8 when the holder 7 is at the reproducing position. U-shaped groove 5a ₁ is formed. In the groove portion 5a ₁ of the U-shaped, each inner wall facing each other, substantially parallel to each other and it is preferable that the arc shape around the holder fulcrum end 1b.

Next, the driving force source transmitted to the lift operation lever 5 will be described.
Is arranged. The lifting drive motor unit 4
It comprises a motor 4a for driving up and down, a gear train composed of a plurality of gears, and a housing 4c for positioning the gear train and covering the gear train for protection.

The output gear 4b, which is the last stage of each gear train,
It is in mesh with the rack portion 5e of the lift operation lever 5. Therefore, the motor 4a serves as a driving force source for reciprocating the lift operation lever 5 in the AB directions with respect to the base chassis 1.

Next, the respective structures and coupling relationships of the holder 7 and the member for elevating and lowering the magnetic head will be described in detail below with reference to FIGS. 7 and 8. As shown in FIG. 7, the holder 7 has a top plate 7a formed in a rectangular shape having a size substantially equal to the planar shape of the disk cartridge 20, and a bottom portion 7n.

The bottom portion 7n is bent inward at the lower portions (tip portions) of the left and right sides formed by the downwardly bent portions on the left and right of the top plate 7a.
The bottom surface of n is formed to be parallel to the surface of the top plate 7a. Therefore, the holder 7 has openings 71 having left and right U-shaped portions facing each other when viewed from the front of the apparatus.

The top plate 7a, the bottom surface 7n having a bent surface, and the left and right side surfaces are connected to the disc cartridge 2 through the opening 7l.
0 so that the disc cartridge 20 is inserted and held.
It is formed so as to have an appropriate interval so as to be slightly larger than the thickness and the width, respectively.

On the rear side of the holder 7, a pair of odd-shaped holes 7c ₁ and 7c ₂ are formed at both left and right side surfaces facing each other so that the holder 7 can rotate freely within a predetermined angle range. Have been. Each of the deformed holes 7c ₁ and 7c ₂ has a pair of chevron portions protruding from the inner wall portions so as to face each other and to approach each other.

Each of the chevron portions is formed such that a virtual line connecting the tips thereof is substantially perpendicular to the middle of the holder 7 within a predetermined rotation angle range. Accordingly, profiled hole 7c _1, 7c ₂ inserted in rectangular plate shape of each holder fulcrum end 1b, the end portion in the width direction of the 1c, each profiled hole 7c ₁ in accordance with the rotation of the holder 7, 7c ₂ The rotation angle range of the holder 7 is also restricted by contact with the inner wall of the holder 7.

[0092] In front of the profiled hole 7c ₂ of the left side surface of the holder 7 is formed a square hole 7h, inward in front of the square holes 7h,
In addition, a bent portion 7i extending in the AB direction is provided to protrude. The bent portion 7i is provided in the disk cartridge 20.
It is arranged so as to be inserted into the rear left side of the guide groove 20 g ₂ of. A bent portion 7j extending inward and in the AB direction is provided at the center of the right side of the holder 7.
Is projected similarly, it is arranged so as to be inserted into the right side surface of the guide groove portion 20 g ₁ of the disk cartridge 20.

A square hole 7k is formed in front of the bent portion 7j. As shown in FIG. 8, an opening 7b having an appropriate size in consideration of a moving range of a magnetic head 12a, which will be described later, is formed in the right central portion of the top plate 7a. Opening 7b
The backward are formed on the same line (arranged in the C-D direction) at right and the center plate of the bending portion 7e extending upward near _1, 7e ₂ is the longitudinal direction, the bending section 7
Behind e ₁ , 7e ₂ , aperture portions 7d ₁ , 7d ₂ bulging upward in an arch shape are formed on the same line in the front-rear direction.

[0094] Further, in the central rear portion and the left rear portion of the holder 7, respectively, substantially L-shaped bent portion extending upward (cut-and-raised portion) 7f _1, 7f ₂ are formed. Each bend 7f ₁ , 7f ₂ has a respective tip 7f _1a , 7f _2a
A magnetic head 12a to be described later is provided between the lower end of the
Each tip end of a substantially rectangular plate-shaped lift connection lever (second moving member) 8, which is a member for raising and lowering the slider, is loosely fitted to form an appropriate gap that can slide.

A part of the cartridge case 20 housed in the holder 7 is moved in the direction B so that a part of the cartridge case 20 housed in the holder 7 is exposed outward from the holder 7 when the cartridge case 20 is taken out. In order for the lever 11 to move, the GH is centered on the fulcrum 7m.
It is attached so that it can rotate in the direction. Start lever 11
In the G direction (cartridge case 2)
0 discharge movement direction).

A lift connecting lever 8 is attached to the left rear of the top plate 7a of the holder 7 so as to be rotatable substantially parallel to the surface of the top plate 7a with the fulcrum 7g as a fulcrum. Lift the coupling lever 8 are respectively loosely fitted between the bottom portions of the left and right ends of the bottom of the top plate 7a and the bending portion 7f ₁ of the distal end portion 7f _1a of the holder 7, and the bending portion 7f ₂ of the distal end portion 7f _2a, lift connection The left and right ends of the lever 8 are mounted on the holder 7 so as not to move more vertically than necessary.

At the left end of the lift connection lever 8, an arm 8 b for fitting the groove 5 a ₁ of the lift operation lever 5 to transmit the driving force from the lift operation lever 5 is directed downward, and its cross section is substantially reduced. It is formed in a U-shaped plate shape. The arm 8b is preferably made of an elastic member such as a metal plate or a plastic plate.

The arm 8 b is substantially perpendicular to the surface of the base chassis 1 and parallel to the side of the holder 7 (second arm) 8 b _2, and substantially to the surface of the base chassis 1. in parallel to, and inwardly bent portion which is bent from the tip inward of the side surface portion 8b ₂ (the first arm portion) 8b ₁ and has.

[0099] The inwardly bent portion 8b ₁ is through a square hole 7h of the holder 7 is formed so as to protrude toward the inside of the holder 7, the bending inward of the left side surface of the holder 7 7i
Are formed so as to be arranged at substantially the same height in the vertical direction. In addition, the inwardly bent portion 8b ₁ is provided with the groove 5a.
_It is set so as to fit into the inside ₁ and also project into the guide groove 20g ₂ of the cartridge case 20.

[0100] The side portion 8b _2, the width of the groove portions 5a ₁
Greater than the width, and are set so as to be in contact from the outside of the near or groove portion 5a ₁ from the outside of the groove 5a _1, therefore, that the side portion 8b ₂ enters the inside of the groove portion 5a ₁ is blocked, it has become one connected to the inner bent portion 8b ₁ and the groove 5a ₁ a (engagement) can reliabilized.

Further, at the right end of the lift connection lever 8, the magnetic head 12a
A cam portion 8a for raising and lowering in the EF direction is formed. Cam unit 8a holder 7 relative to the surface of the top plate 7a, an inclined portion 8a ₁ having an inclined upper surface such that successively higher from the front side to the rear side, extends subsequently from the rear end of the inclined portion 8a ₁ and a flat portion 8a ₂ with the top plate 7a substantially horizontal upper surface.

A shutter retaining spring having an elastic portion is provided in front of the right side of the holder 7 (hereinafter referred to as a shutter spring).
10 are incorporated. In front of the shutter spring 10, a block 10b protruding into the holder 7 in a V-shape is formed to protrude inward through a square hole 7k of the holder 7.
Therefore, the block 10b is elastically movable in the left-right direction (CD direction).

[0103] Also, the shutter spring 10, at the back, has a first biasing portion 10a ₁ and the second biasing portion 10a _2. The second urging portion 10a _2, the shutter spring 1
0, extending upward from the side of the holder 7 behind,
It is provided to have elasticity in the direction. The first
Urging portion 10a ₁ is top plate 7a substantially parallel to bent the second urging portion 10a holder 7 from the upper part of the _2, extends in elongated rearward shape, vertically (E-F direction) It is disposed on the top plate 7a of the holder 7 with elasticity.

A lift lever (head displacing means) 9 is incorporated in the holder 7 on the right rear side of the top plate 7a. The lift lever 9 has a flat portion 9f and a flat portion 9g parallel to the flat portion 9f and provided with a step below the flat portion 9f. Step bending portions 9a ₁ and 9a ₂ of lift lever 9 and step bending portions 9c ₁ and 9 of lift lever 9
c _2, 9c ₃ is formed in a plane parallel to each other have respective flat portions 9f, the 9g and the step, respectively.

Note that the step bending portions 9a ₁ and 9a ₂ are formed as flat surface portions 9f.
Is formed so as to have the same level difference as the stepped portion 9.
c ₁ , 9c ₂ , and 9c ₃ are also formed so as to have the same level difference as the flat portion 9f.

Bending portion 7e of holder 7₁, 7e_Two,
Hole 9b of left lever 9₁, 9b _TwoIs inserted and riff
Treble 9 is regulated to the front, back, left and right with respect to holder 7
And each of the arched apertures 7d of the holder 7₁, 7
d_TwoSteps of the lift lever 9 respectively inserted underneath
Barb 9a₁, 9a_TwoAnd the tip is the same line in the front-back direction
Formed on the upper surface of each of the throttle portions 7d of the holder 7₁, 7d_Twoof
Lift lever located on approximately the same line in front and back and forth
-9 step bending part 9c₁, 9c_Two, 9c_ThreeAnd by holder
-7 by sandwiching the top plate 7a, the lift lever
Reference numeral 9 designates each narrowed portion 7d of the holder 7 with respect to the holder 7.₁, 7
d_TwoTo be pivotable in the IJ direction with the front end of
Will be attached.

Therefore, the fulcrum of the lift lever 9 is inserted
Is formed, the fulcrum can be made thin.
Was. At this time, the lift lever 9
Of the holder 7 in the direction I about 45 degrees with respect to the top plate 7a
Then, each of the narrowed portions 7d of the holder 7₁, 7
d_TwoBend section 9a of lift lever 9 under₁, 9a _Two
And then rotate the lift lever 9 in the J direction.
To be bent and the bent portion 7e of the holder 7₁, 7e_TwoOn the lift
Deformed hole 9b of lever 9₁, 9b_TwoInto each,
It will be incorporated in the holder 7.

At the left and right ends of the flat portion 9g of the lift lever 9, step bending portions 9e ₁ and 9e ₂ parallel to the flat portions 9f and 9g are respectively provided outwardly in the CD direction. It is formed so as to extend. Also, the lift lever 9
On the left side of the flat portion 9 g, by the rotation of the lift coupling lever 8, so that the inclination engaging surface 9d for vertically moving the front end portion 9 g ₁ of the lift lever 9 engages with the cam portion 8a of the lift coupling lever 8 Is formed. A bent portion 9h extending upward is provided near the right end of the flat portion 9f of the lift lever 9.
Are formed.

The first biasing portion 10a ₁ of the shutter spring 10
The tip is a top planar portion 9f of the lift lever 9, is applied to the inside of the bend portion 9h, the lift lever 9 each constricted portion 7d ₁ of the holder 7 arched respect to the holder 7,
It is urged in the J direction with the front end of 7d ₂ as a fulcrum.

First biasing portion 10a _{1 of} shutter spring 10
Is set so that the lift lever 9 does not rattle due to vibration or the like.
As load more than necessary when the I direction of the rotation operation is not applied, so as to set as possible spring constant low, properly set the thickness of the shutter spring 10, the first biasing portion 10a ₁ of the length, width Have been.

[0111] Further, during assembly, when applying the first biasing portion 10a ₁ of the shutter springs 10 on the lift lever 9, the first biasing portion 10a ₁ is in the second lateral direction of the urging portion 10a ₂ elastic As a result, since it has elasticity also in the CD direction, it can be hooked from outside the bent portion 9h of the lift lever 9, and the assembling property is improved.

Next, the connection between the base chassis 1 and the holder 7
Fig. 4 shows the relationship and the coupling relationship of the magnetic head elevating mechanism.
And FIG. 8 to FIG.
You. As shown in FIG.
Formed irregular hole 7c₁, 7c _TwoBut base chassis 1
End 1 for each holder fulcrum formed on the left and right rear of
b and 1c, respectively, and bent the base chassis 1.
The holder 7 is moved in the CD direction by the right end of the portion 1i.
Movement restriction and provided on the right side of the holder 7.
The upper limit of the rotation angle is restricted by the L-shaped protrusion 7o.
In this state, the holder 7 is
Rotating in the I-J direction with the end portions 1b and 1c for
It will be movably mounted.

The magnetic head lifting / lowering mechanism in the disk drive of the present invention will be described below in detail with reference to FIGS. As shown in FIGS. 8 and 9,
The left rear bent portion 5a of the lift operation lever 5 incorporated in the base chassis 1 so as to be slidable in the AB direction is inserted into a square hole 7h formed in the side wall of the holder 7, and the left side surface of the cartridge body 20b. It is set so as to be substantially collinear with the vicinity and the left side wall of the holder 7, and is set so as to slide in the AB direction within the square hole 7h along substantially the same line as the left side wall of the holder 7.

[0114] inwardly bent portion 8b ₁ of the leftmost U-shaped arm portion 8b of the lift coupling lever 8 pivotably mounted to G-H direction to the holder 7, the lift operation lever 5 bent portion 5a by being inserted from the outside, it is projected to the inside of the holder 7 in a U-shaped groove portion 5a ₁ formed,
The lift operation lever 5 and the lift connection lever 8 are connected to each other.

The U-shaped arm 8b of the lift connecting lever 8
The length of the inner bent portion 8b _1, at play and shocks, engagement of the U-shaped arm portion 8b of the groove 5a ₁ of the U-shaped lift operation lever 5 and the lift coupling lever 8 is disengaged in It is set to be long enough so that it does not exist. In addition, the inwardly bent portion 8b
₁ is formed at the same height in the vertical direction as the inwardly bent portion 7i provided on the left side surface of the holder 7 as described above.

Therefore, when the disk cartridge 20 is mounted on the holder 7, the inwardly bent portion 8b
₁ becomes a that its tip is inserted into the guide groove 20 g ₂ of the rear left side of the disk cartridge 20 to ensure the connection of the inwardly bent portion 8b ₁ and lift operation lever 5 and the lift coupling lever 8 Even if the length is set to be long enough, the connection part of the lift operation lever 5 and the lift connection lever 8
That connection between the arm portion 8b of the U-shaped groove 5a ₁ and the lift coupling lever 8 of the lift operation lever 5 (engagement) portion is avoided that the increase in the lateral direction (horizontal direction).

[0117] That is, the bending portion 5a having a groove 5a ₁ of the U-shaped lift operation lever 5 is immediately or in the vicinity of the side surface of the disc cartridge 20, it is possible to stand in each square hole 7h, the holder 7 Can be arranged so as to be substantially fitted in the left side wall of the device, and the size can be reduced.

[0118] Further, since the width of the side portion 8b ₂ of the arm portion 8b of the lift coupling lever 8 is formed to be larger than the groove portion 5a ₁ of the width of the lift operation lever 5 (distance), of the lift coupling lever 8 will be moving in the C direction is restricted, it is possible to prevent the engagement of the shaped arm portion 8b of the U of the U-shaped groove portions 5a ₁ and the lift coupling lever 8 of the lift operating lever 5 is disengaged, and, Bend 5a of lift operation lever 5
And a side portion 8 of a U-shaped arm portion 8b of the lift connecting lever 8
b ₂ a gap (the spacing) it is possible to set as small as possible, it was to contribute to the miniaturization of the connection portion.

The U-shaped groove 5 of the lift operation lever 5
Each inner wall facing each other a _1, as shown in FIG. 10,
By moving the disk cartridge 20 to the insertion / removal position,
Even if the holder 7 pivots in the IJ direction about the holder fulcrum ends 1b and 1c of the base chassis 1, the lift connection lever 8 does not rotate in the H direction even if the lift connection lever 8 rotates in the H direction. ₂ as the center, and the position of the fulcrum profiled hole 7c ₂ of the holder 7, and the position of the inner bent portion 8b ₁ of the lift coupling lever 8 at the time of the movement between the insertion and removal position of the disk cartridge 20 and the playback position Each distance (L in FIG. 10)
1, L2) are respectively formed in an arc shape having a radius.

Further, the bending portion 5a of the lift operation lever 5
, That is, the depth of the U-shaped groove 5 a ₁ , at the insertion / removal position of the disk cartridge 20, the holder 7 is moved in the I-J direction with the holder fulcrum ends 1 b and 1 c of the base chassis 1 as fulcrums. be rotated, it is set at a height to maintain the engagement between the inner bending portion 8b ₁ of the shaped arm portion 8b of the U-shaped groove 5a ₁ and co (depth).

[0121] Each internal wall facing each other in this way the groove portion 5a _1, in an arc shape as described above, respectively, and so that the holder 7 is to maintain the engagement between the bent portion 8b ₁ inward pivoted during the forming, it becomes possible to minimize the deviation of the position of the lift coupling lever 8 due to the I-J direction of the rotation of the holder 7, the respective inner and an inner bent portion 8b ₁ on , The contact resistance can be reduced, and the rotation of the holder 7 can be made smooth. In addition, the ease of assembly when assembling the lift operation lever 5 and the lift connection lever 8 to the base chassis 1 and the holder 7, respectively, can be further improved.

Next, the configuration of the magnetic head device 12 and the connection relationship with the optical pickup device 2 and the lift connection lever 8 will be described in detail below. As shown in FIGS. 4 and 5, the magnetic head device 12 has a magnetic head 12a for applying an external magnetic field modulated in accordance with an information signal to be recorded on the disk 20a, and the magnetic head 12a is supported at the tip. An elastically displaceable leaf spring 12b and a magnetic head support plate 13 for supporting the leaf spring 12b are provided.

The magnetic head device 12 includes the turntable 3
optical pickup device 2 with the disc 20a on
The magnetic pickup device 2 and the magnetic head device 12 are connected so that the magnetic head device 12a is reciprocated in the radial direction of the disk 20a in synchronization with the optical pickup device 2 and operated. It is connected to the link member.

[0124] The structure and connection relationship of the link members for connecting the magnetic head device 12 and the optical pickup device 2 will be described below. The link member is shown in FIG.
As shown in FIGS. 12 to 14, the optical pickup device 2 includes a connection angle 14 fixedly supported by the optical pickup device 2 and a magnetic head biasing spring 15 that can be elastically displaced.

The connecting angle 14 is formed in a substantially L-shape as a whole by a connecting piece 14b and a mounting piece 14a orthogonal to the connecting piece 14b. The mounting piece 14a is connected to a rear portion of the optical pickup device 2 by a mounting screw. The connecting piece 14 b projects upward from the rear of the base chassis 1.

Magnetic Head Support Plate 1 of Magnetic Head Device 12
3 is clamped by an end formed above the connecting piece 14b of the connecting angle 14 and a magnetic head biasing spring 15 having one end fixed to the connecting piece 14b of the connecting angle 14 and having an elastic portion. The upper end of the connecting piece 14b of FIG.
It is rotatably supported in the −J direction, and is urged in the J direction by a spring (not shown).

The rotation of the magnetic head support plate 13, that is, the magnetic head 12a in the J direction (direction approaching the signal recording surface of the disk 20a) is performed by the bending portions 14c provided on the left and right of the upper part of the connection angle 14. The upper end restricts the magnetic head support plate 13 at a position substantially parallel to the flat portion (surface) of the base chassis 1.

Next, the operation of the link member will be described in detail below.
The lower angled portion 13a
Is inserted between the two inclined bending portions 14e of the connection angle 14, thereby restricting the X direction, and the two upper bending portions 13b and the planar protruding end portion 13c form the connection piece 14b of the connection angle 14. By sandwiching the plate thickness, Y
By regulating the direction and regulating the Y direction at two places,
The GH direction, which is the plane rotation direction, is regulated.

Further, the rear portion of the magnetic head support plate 13 is sandwiched at two places by an upper protruding end portion 14d of the connection angle 14 extending upward and a tip end portion 15b of an arm portion 15a of the magnetic head biasing spring 15. Is regulated in the EF direction.

At this time, the distal end 15b of the magnetic head biasing spring 15 is located behind the upper protruding end 14d of the connecting angle 14, so that even if the play in the EF direction is reduced to some extent, the necessary IJ is required. In the direction [the magnetic head support plate 13 rotates in the direction I with respect to the horizontal position (reproduction position)] (1).
About 5 degrees; set by the rotation angle between the reproduction position and the insertion / removal position in the holder 7).

With the above structure, the magnetic head device 12 and the magnetic head support plate 13 are
The movement in the AB direction, the CD direction, the EF direction, and the GH direction is restricted, and the inclined bending portion 14 e of the connection angle 14 is restricted.
Are supported rotatably in the I-J direction with the holding point between the magnetic head biasing spring 15 and the distal end portion 15b as a fulcrum. The bias of the magnetic head device 12 and the magnetic head support plate 13 in the J direction is given by a spring (not shown).

The operation of each component in the present embodiment will be described below. As shown in FIGS. 4 and 10,
The holder 7 has a recording / reproducing position lowered on the base chassis 1 for recording and / or reproducing information signals on the disk 20a around the end portions 1b and 1c for the holder fulcrum, and insertion or ejection of the disk cartridge 20. Is rotated in the I-J direction over the raised insertion / removal position.

First, the insertion / removal position for inserting or ejecting the disk cartridge 20 will be described below. When the lid of the housing constituting the apparatus main body is opened upward, the front opening 71 of the holder 7 faces the outside of the apparatus main body,
The disc cartridge 20 can be inserted through the opening 71 of the holder 7, and the disc cartridge 20 held by the holder 7 can be ejected (taken out).

In this state, the lift operation lever 5 has been moved in the direction A, and the lift connection lever 8 is
Fulcrum portion 7g by the engagement of the inner bent portion 8b ₁ of the U-shaped groove 5a ₁ and the lift coupling lever 8 of the lift operating lever 5
Is rotated in the G direction about the center.

The cam portion 8a of the lift connecting lever 8 is
1 (a), the inclined engagement surface of the lift lever 9
9d and the flat portion of the cam portion 8a of the lift connection lever 8
8a _TwoIn contact with Therefore, the lift lever 9
Is the front end 9g₁Is the first bias of the shutter spring 10
Part 10a₁Against the urging force of the
7d₁, 7d_TwoIn the I direction with the front end of
Rotated state (the magnetic head 12a is
(A separated state where contact with the switch 20 is prevented).

[0136] That is, the magnetic head device 12, a state in which the plate spring 12b is in contact with the end face 9g ₁ of the planar portion 9g of the lift lever 9, the magnetic head 12a is an upper end portion of the coupling piece 14b of the connecting angle 14 Magnetic head biasing spring 1
5, the magnetic head 12a is slightly rotated above the inner wall of the top plate 7a of the holder 7, and the magnetic head device is inserted and ejected by the disk cartridge 20. 12 is set so as to be prevented from being damaged by contact with the disk cartridge 20.

In such a state that the disk cartridge 20 can be inserted / ejected, the disk cartridge 20 is guided into the holder 7 via the opening 7l and guided by the top plate 7a, the bottom surface 7n, and both right and left sides.

At this time, the inwardly bent portion 7j of the right side surface of the holder 7 is formed by the guide groove portion 20g _{1 of the} disk cartridge.
When the operator pushes the disc cartridge 20 inward, the inward bent portion 7j on the right side of the holder 7 rotates the lock lever 20f in the G direction to move the shutter 20e. The restriction is released, and the shutter 20e moves in the direction B with respect to the cartridge main body 20b by contacting the side end of the shutter 20e of the disk cartridge 20.
A state in which the disk 20a is exposed through the 0c _1, 20c _2.

On the other hand, as shown in FIGS. 15 (a), 15 (b) and 15 (c), as shown in FIG.
When the rear left side of the guide groove 20 g ₂ of the bending portion 7i of the left side surface of the holder 7 is inserted, is further pushed the disk cartridge 20, the inner bent portion 8 of the lift coupling lever 8
b ₁ is to be inserted into the rear left side of the guide groove 20 g ₂ of the disk cartridge 20.

Subsequently, as shown in FIG.
When the disc cartridge 20 is continuously pushed into the holder 7 in the inner direction of the apparatus (A direction), the insertion end of the cartridge case 20 comes into contact with the lever 11,
Further, if the operator continues to push the ejection lever 11 against the urging force of the ejection lever 11 in the G direction, the ejection lever 11 is locked and the disc cartridge 20 is placed in the holder 7.
Will be held at a predetermined position in the inside.

From this state, the cover 7 of the housing (not shown) is rotated in the J direction, and the holder 7 held by the cover is used for recording / reproducing information signals, as shown in FIGS. 8 and 11B.
Or playable state (hereinafter referred to as loading position)
Becomes That is, the holder 7 is synchronized with a lid (not shown) and the holder fulcrum ends 1b, 1c of the base chassis 1.
The disk cartridge 20 held by the holder 7 approaches the base chassis 1 with the fulcrum as a fulcrum.

At this time, the disc cartridge 20
The positioning pins 1d and 1e of the base chassis 1 shown in FIG.
Are mounted on the base chassis 1 at the recording / reproducing position by inserting the positioning holes 20h and 20i respectively. In this state, the disk 20a is chucked by the turntable 3b, and the rotation of the disk 20a by the rotation of the spindle motor 3a becomes possible.

In this state, the lift operation lever 5 maintains the state of being moved in the direction A similarly to the state of the above-mentioned insertion / removal position. As shown in FIGS. 10 and 8, the lift connection lever 8 is pivotally moved in the J direction about the holder fulcrum ends 1 b and 1 c of the holder 7, as shown in FIGS. 10 and 8. inwardly bent portion 8b ₁ moves in the groove portion 5a ₁ of the U-shaped lift operation lever 5 in the J direction.

The U-shaped groove 5a _{1 of the} lift operation lever 5
Of the base chassis 1 at the position where the lift operation lever 5 has moved in the A direction.
Is set in the shape of an arc, and the lift connecting lever 8 does not move with respect to the holder 7 in the rotating operation about the holder fulcrum ends 1b and 1c as the fulcrum. It is held in the state of the position, and held in a state of being rotated in the G direction.

Therefore, the lift lever 9 is also held with respect to the holder 7 in the state of the insertion / removal position, and is held while being rotated in the I direction. On the other hand, the magnetic head device 12
In synchronization with the rotation of the holder 7 in the J direction, the upper end of the connecting piece 14b of the connecting angle 14 and the magnetic head biasing spring 1
5 is rotated in the J direction with the holding portion with 5 as a supporting point.

In this loading position, the lift
Since the lever 9 is held while being rotated in the I direction,
The air head device 12 is an end face of the flat portion 9g of the lift lever 9.
9g ₁As a result, the leaf spring 12b is moved upward.
You. Therefore, the magnetic head 12a is shown in FIG.
As described above, in the second position separated above the disc 20a,
Will be retained.

The second position is the position of the magnetic head 1 in the stop or reproduction mode as the operation mode of the apparatus.
2a. In this state, when an operator operates a recording button provided on a housing (not shown), a voltage is applied to a motor 4a for driving up and down by an electronic circuit (not shown) provided in the housing.

The movement position (first position) of the magnetic head 12a in the recording mode in the above-described loading position will be described in detail below with reference to FIGS. 6, 11 (c) and 15 to 17. Motor 4a for lifting drive
Is applied, and the output gear 4b rotates through a gear train (not shown), and the lift operation lever 5 moves in the direction B along the base chassis 1 by the rack 5e meshed with the output gear 4b. The bent portion 5a of the lift operation lever 5 moves in the direction B in the square hole 7h of the holder 7 in parallel with the left side wall of the holder 7.

The U-shaped groove 5a _{1 of the} lift operation lever 5
And by inward bending portion 8b ₁ of the lift coupling lever 8 is connected (engaged), with the movement of the B direction of the lift operating lever 5, the lift coupling lever 8 fulcrum portion 7g on the holder 7 Rotate in the H direction about the center. At this time,
Inwardly bent portion 8b ₁ of the lift coupling lever 8 becomes movable within the left side of the guide groove 20 g ₂ of the cartridge main body 20b. Thus the inward bent portion 8b ₁ of the length, be set longer than the thickness of the groove portion 5a ₁ in order to ensure the connection between the inner bend 8b ₁ and the groove 5a _1, the lift coupling lever 8 There is no hindrance to movement.

[0150] contact with the inclined engaging surface 9d of the cam portion 8a and the lift lever 9 of the lift coupling lever 8, with the rotation of the lift coupling lever 8, the inclined portions 8a of the plane portion 8a ₂ of the cam 8a _Move to ₁ and finally separate. At this time,
The lift lever 9 is connected to the first biasing portion 1 of the shutter spring 10.
By the urging force of 0a _1, as a fulcrum the front edge of the arcuate aperture portion 7d _1, 7d ₂ of the holder 7, rotates in the J direction to the holder 7.

In the magnetic head device 12, FIG.
(C), the the contacting of the end surface portion (B direction end face) 9g ₁ of the planar portion 9g of the leaf spring 12b and the lift lever 9 is separated, by the urging force of the plate spring 12b, the magnetic head 12a contacts with a constant contact pressure on the signal recording surface of the disk 20a through the opening 20c ₂ in the opening portion 7b and the disk cartridge 20 of the holder 7, which face each other across the objective lens 2a and the disk 20a of the optical pickup apparatus 2 It is set as follows.

When the recording mode is selected, the disk rotating device 3 starts driving, and rotates the disk 20a cranked by the turntable 3b integrally with the turntable 3b.

Here, the optical pickup device 2 is driven, and the light beam emitted from the light source is
The desired information is recorded by applying an external magnetic field modulated according to the information signal to be recorded from the magnetic head 12a to the disk 20a while scanning the signal recording area a.

In this recording mode, the front end 5f of the lift operation lever 5 projects from the front of the base chassis 1 with the movement of the lift operation lever 5 in the direction B. The holder 7 is inadvertently rotated in the I direction from the state at the first position by preventing the lid of the device (not shown) from being opened carelessly by engaging with the engaging portion of the device body (not shown). Is prevented.

When the operator operates a stop button provided on a casing (not shown) from the first position (recording mode), an electronic circuit (not shown) provided in the casing causes a motor 4a for elevation drive to move. A voltage opposite to the voltage when the recording button is operated is applied.

The stop mode (second position) is shown in FIGS.
And FIG. 9 and will be described in detail below. When a voltage is applied to the motor 4a and the motor 4a rotates, the output gear 4b rotates via a gear train (not shown), and the lift operation lever 5 moves in the direction A along the base chassis 1 by the rack 5e meshed with the output gear 4b.

The bent portion 5a of the lift operation lever 5 moves in the direction A in the square hole 7h of the holder 7 in parallel with the left side wall of the holder 7. U-shaped groove 5a _{1 of the} lift operation lever 5
Is connected to the U-shaped arm 8b of the lift connection lever 8, the lift connection lever 8 moves around the fulcrum 7g on the holder 7 with the movement of the lift operation lever 5 in the direction A. To rotate in the G direction.

The cam portion 8a of the lift connecting lever 8 and the inclined engaging surface 9d of the lift lever 9 are moved from the separated position by the rotation of the lift connecting lever 8 in the G direction, thereby causing the lift lever 9 to rotate.
Inclined engaging surface 9d is in contact with the inclined portion 8a ₁ of the cam portion 8a of the lift coupling lever 8, the lift lever 9 along the inclined portion 8a ₁ to the first urging force of the urging portion 10a ₁ of the shutter spring 10 In contrast, the arched narrow portions 7d ₁ , 7 of the holder 7
as a fulcrum the front edge of d _2, begins to rotate in the direction I with respect to the holder 7.

[0159] inclined engaging surface 9d of the lift lever 9 finally contact with the flat portion 8a ₂ of the cam 8a of the lift coupling lever 8, the flat portion 9g of the lift lever 9 end face 9g ₁ is the holder 7 The lift lever 9 and the lift connection lever 8 are held at a position pivoted to an upper position separated from the top plate 7a by contact.

When the lift lever 9 is rotated to the upper position, the inclined engaging surface 9d is formed so as to be parallel to the top plate 9a of the holder 9, and the flat portion 8a ₂ of the cam portion 8a of the lift connecting lever 8 is formed. And become parallel. Therefore, even if the lift connecting lever 8 or the lift lever 9 is displaced, the amount of rotation of the lift lever 9 does not change, and the position of the magnetic head 12a, which will be described later, separated upward is stabilized. .

When the lift lever 9 is rotated to the upper position, the inclined engaging surface 9d is attached to the top plate 9 of the holder 9.
a, the height of the inclined engagement surface 9d can be set low, and the lift lever 9 can be arranged closer to the magnetic head 12a where the amount of rotation of the lift lever 9 is large. Magnetic head 12a due to variation in
It is possible to improve the accuracy of the retreat position upwards.

Therefore, when the disk cartridge 20 is ejected, the disk cartridge 20 and the magnetic head 1
Since the contact with the magnetic head 2a is avoided and the height of the magnetic head 12a can be set at a low position, the size of the apparatus can be reduced.

[0163] Further, in the magnetic head device 12, the lift lever 9 when rotated in the direction I, and the end face portion 9g ₁ of the planar portion 9g of the leaf spring 12b and the lift lever 9 presses abuts from a position spaced apart from each other In order to move to the position, the magnetic head 12a is moved to the second position separated above the disk 20a against the urging force of the leaf spring 12b.

On the other hand, the disk 20a is attached to the base chassis 1.
Cartridge 20 containing a disk or disk cartridge 2 containing a read-only optical disk 21a
When the reproduction button is operated and the reproduction operation mode is selected by the user, the external magnetic field does not need to be applied.

That is, to read the information signal recorded on the disk 20a, the light beam emitted from the optical pickup device 2 scans the signal recording surface of the disk 20a, and the light beam reflected from the signal recording surface of the disk 20a Is detected by a photodetector provided in the optical pickup device 2. Therefore, since the reproduction of the information signal does not require an external magnetic field, the operation of driving the lift operation lever 5 to move in the B direction is omitted.

The first disk drive of the present invention comprises:
A disk drive device in which a reproducible disk is housed in a housing-like cartridge case, and a guide groove parallel to an insertion direction from an end surface of the cartridge case in an insertion direction is formed on a side portion of the cartridge case. A first movement that is supported by the base and moves in substantially the same direction as the insertion / removal direction of the cartridge case, and that has a U-shaped groove positioned substantially at the front end in the movement direction and near the side of the cartridge case; A member, a holder rotatable around a cartridge case insertion depth, a cartridge case insertion guide portion, and a disc that is brought to a position where a disc can be reproduced / recorded by rotating with respect to the base; A second moving member movably supported by the holder, wherein the second moving member has at least two or more arms And one of the arms is fitted into the U-shaped groove of the first moving member, and is also inserted into the guide groove on the side of the cartridge case. Good.

According to a second disk drive of the present invention, in the first disk drive, the arm of the second moving member is fitted into the groove of the first moving member, and A first arm inserted into the guide groove of the case; and a second arm connected to the first arm and facing the groove from outside, wherein the width of the second arm is the groove. May be set to be larger than the width of.

According to a third disk drive device of the present invention, in the first disk drive device, an inward bent portion to be inserted into a guide groove on a side portion of the cartridge case is provided on a side surface of the holder. Having the second
The first arm inserted into the guide groove on the side of the cartridge case formed on the moving member is formed at substantially the same position as the inwardly bent portion of the holder in the height direction orthogonal to the cartridge case insertion direction. And the inwardly bent portion of the holder may be disposed rearward in the cartridge case insertion direction.

Further, the fourth disk drive device of the present invention, in the first disk drive device, cuts and raises the holder in the vicinity of the first arm portion and the second arm portion of the second moving member. Part, the cut-and-raised portion, by loosely fitting the second moving member between the mounting surface of the holder that supports the second moving member,
An appropriate gap for regulating play in the vertical direction of the second moving member may be provided.

According to the fifth and sixth disk drive devices of the present invention, in the first disk drive device described above, the U-shaped groove of the first moving member is configured so that the cartridge case can be inserted into and removed from the cartridge case. The second movement to be fitted into the U-shaped groove of the first moving member at the time of insertion / removal of the cartridge case from the position of the holder rotation fulcrum about the rotation fulcrum of the holder to be moved between possible positions. It may be formed in an arc shape having a radius that is a projection distance between the position of the first arm portion of the member and the rotation plane of the holder.

A seventh disk drive device according to the present invention, in the first disk drive device, further includes a magnetic head for recording information on a disk by generating a magnetic field, and the holder is rotatably mounted on the holder. The rotating operation is performed between a first position where the magnetic head is supported and is in a recording state and the magnetic head is located farther from the disk than the first position in a non-recording state. A head elevating plate for raising and lowering the magnetic head is provided as head displacing means, and a cam portion for performing a rotating operation of the head elevating plate is provided at the other end of the second moving member. Is provided with an engagement surface that engages with a cam portion of the second moving member. The cam portion holds the magnetic head at a second position with the inclined portion. The magnetic head has a flat portion that is substantially parallel to the disk surface, and the shape of the engaging surface of the head elevating plate is such that the engaging surface of the head elevating plate at the second position where the magnetic head is separated from the disk is also It may be formed so as to be substantially parallel to the disk surface.

An eighth disk drive device according to the present invention, in the fifth disk drive device, wherein the cartridge case is provided with a shutter for opening and closing a window for exposing the disk, and a side surface of the holder. Is provided with a shutter locking spring having an elastic portion, which is engaged with the shutter, performs at least a closing operation of the shutter, and has the other end of the shutter locking spring,
A first biasing portion having elasticity in the up-down direction and a second biasing portion having elasticity in the left-right direction and having the first biasing portion formed at the distal end portion are formed, and are formed in the rotating direction of the head lifting plate. The urging means for applying the urging force may be set by the first urging portion of the shutter locking spring.

[0173]

According to the disk drive device of the present invention, the first moving member which is moved by the driving force has the holder displaced between the insertion / removal position of the case and the reproduction position of the disk in the case at the reproduction position. Sometimes, a groove is provided in the direction along the side surface of the holder, and the arm is fitted into the groove in the second moving member to which the driving force from the first moving member is transmitted. The configuration is such that it is formed to be inserted also into the guide groove of the case.

Therefore, in the above configuration, the driving force is transferred from the first moving member to the second moving member by fitting the arm into the groove.
A coupling mechanism that transmits driving force between the first moving member and the second moving member by transmitting the driving force between the first moving member and the second moving member by inserting the arm portion into the guide groove of the case while transmitting the arm portion to the guide groove of the case. This has the effect of reducing the size of a conventional coupling mechanism that is increased in size by protruding outward and the like, and has the effect of contributing to downsizing of the device.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a disk drive device of the present invention.

FIGS. 2A and 2B show a disk cartridge which is used in the disk drive device and stores a disk on which recording / reproduction is performed by magneto-optics, wherein FIG. 2A is a rear view, FIG. 2B is a left side view, and FIG. It is a figure, (d) right side view.

FIGS. 3A and 3B are explanatory views showing a disk cartridge used in the disk drive device and containing a read-only optical disk, wherein FIG. 3A is a rear view, FIG. 3B is a left side view, and FIG. FIG. 3D is a right side view.

FIG. 4 is a perspective view of the disk drive device.

FIG. 5 is a rear view of a first position (stop / play mode) in the disk drive device.

FIG. 6 shows a base chassis of the disk drive device,
FIG. 4 is a perspective view showing a connection relationship of a part of an optical pickup device, a disk rotating device, and a magnetic head lifting / lowering mechanism provided in a base chassis.

FIG. 7 is a perspective view showing a coupling relationship between a holder of the disk drive device and a magnetic head elevating mechanism provided in the holder.

FIG. 8 is a left side view of the disk drive shown in FIG. 5;

FIG. 9 is a top view of the disk drive device shown in FIG. 5;

FIG. 10 is a left side view showing a disk insertion / removal position of the disk drive device.

FIG. 11 is a schematic diagram showing a cam portion and a lift lever of a lift connection lever of the disk drive device, and a main portion of an engagement relationship between the lift lever and the magnetic head device;
(A) shows the disk insertion / removal position, (b) shows the first position of the magnetic head, and (c) shows the second position of the magnetic head.

FIG. 12 is an exploded perspective view showing a structure of a link member for connecting the magnetic head device and the optical pickup device in the disk drive device.

FIG. 13 is a perspective view of the link member.

FIG. 14 is a plan view of the link member.

FIG. 15 is an explanatory diagram showing a main part of the disk drive device at a first position, where (a) is a left side view,
(B) is a top view and (c) is a rear view.

FIG. 16 is a left side view showing a second position (recording mode) in the disk drive device.

FIG. 17 is a top view of the disk drive device.

FIG. 18 is an explanatory view showing a main part of a conventional disk drive device at a moving position in a direction A, FIG.
(B) is a left side view, and (c) is a top view.

FIGS. 19A and 19B are explanatory views showing main parts of the conventional disk drive device at a moving position in the direction B, wherein FIG. 19A is a rear view, FIG. 19B is a left side view, and FIG. is there.

FIG. 20 is a left side view showing a main part of the conventional disk drive device at a disk insertion / removal position.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Base chassis (base) 1b Holder fulcrum end 1c Holder fulcrum end 2 Optical pickup device 5 Lift operation lever (first moving member) 5a ₁ groove 7 Holder 7c Rotation fulcrum hole 7i Bend 7f ₁ bend (Cut and raised portion) 7f ₂ bent portion (cut and raised portion) 8 lift connection lever (second moving member) 8a cam portion 8a ₁ inclined portion 8a ₂ flat portion 8b bent portion (arm portion) 8b ₁ inward bent portion (second portion) 1b) 8b ₂ side surface (second arm) 9 lift lever (head displacing means) 9d inclined engagement surface 10 shutter spring (shutter locking spring) 10a ₁ first biasing portion

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Daisuke Teshima 22-22, Nagaike-cho, Abeno-ku, Osaka-shi, Osaka Inside (72) Inventor Sadao Uchiyama 22-22, Nagaike-cho, Abeno-ku, Osaka-shi, Osaka F term in reference (reference) 5D046 BA12 CB02 EA11 FA01 HA05 5D068 AA02 BB01 CC03 EE13 GG01

Claims (8)

[Claims] 1. A housing-like case for rotatably storing a reproducible disk is provided with a guide groove for inserting and removing the case on a side surface of the case, and a base is provided on the base. A holder facing the side surface and holding the case is provided so as to be displaced between the insertion / removal position and the reproduction position of the case, and the first moving member to which the driving force is transmitted can be moved to the base. A second moving member supported and movably supported by the holder,
The driving force from the first moving member is provided so as to be transmitted when the holder is at the reproducing position.
A groove is provided in a direction along a side surface of the holder, and the second moving member is formed such that an arm is inserted into the groove and inserted into a guide groove of the case. A disk drive device. 2. The disk drive device according to claim 1, wherein the arm portion is fitted into the groove portion and is connected to the first arm portion and inserted into the guide groove. And a second arm portion facing from the outside, wherein the width of the second arm portion is set to be larger than the width of the groove portion. 3. The disk drive device according to claim 2, wherein an inwardly bent portion inserted into the guide groove is formed on an inner side surface of the holder by the first arm portion. A disk drive device formed on the side. 4. The disk drive device according to claim 1, wherein a cut-and-raised portion is provided on the holder so as to loosely fit the second moving member between the holder and the holder. Characterized disk drive device. 5. The disk drive device according to claim 1, wherein each inner wall of said groove is formed along a direction in which the holder is displaced. 6. The disk drive device according to claim 1, wherein the holder is configured to rotate the case to an insertion / removal position by rotating the holder.
A disk drive device provided so as to be displaced from a reproduction position, wherein each inner wall of the groove is formed along the direction of displacement of the holder. 7. The disk drive device according to claim 1, further comprising a magnetic head for recording information on a disk by generating a magnetic field, wherein the magnetic head is provided at a reproducing position of a holder. Head displacement means for displacing the magnetic head over a first position located close to the disk and a second position located at a position farther from the disk than the first position.
A cam portion for displacing the magnetic head by a driving force from a moving member, a cam portion for displacing the head displacing means is provided at an end of the second moving member on the side opposite to the arm portion, an inclined portion,
Following the inclined portion, the magnetic head is held at a second position, and a flat portion substantially parallel to a surface of the disk is provided. A disk drive, wherein an engaging surface of the head displacement means is formed substantially parallel to a surface of the disk when the magnetic head is in the second position. apparatus. 8. The disk drive device according to claim 7, wherein the case is provided with a shutter for opening and closing a window for exposing the disk, and a side surface of the holder is engaged with the shutter, A shutter locking spring having an elastic member for biasing the shutter in a closing direction; a first biasing portion having elasticity in a thickness direction of the disk at one end of the shutter locking spring; And a second biasing portion having elasticity and having the first biasing portion at a distal end thereof is formed, and the first biasing portion applies a biasing force in a displacement direction of the head displacement means. A disk drive device comprising: