JPH0519781B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk drive device that reads or writes information by driving a recording medium such as a magnetic disk housed in a cassette.

[Prior Art] Conventionally, according to this type of disk drive device,
The recording medium on the disk is inserted into the device through the disk insertion opening, mounted on a disk rotation spindle in the device, and the recording/playback head is brought into contact with the disk surface while rotating the disk. Therefore, it is configured to perform recording and reproduction.

Specifically, when installing a disk, after inserting the disk through the disk insertion slit, operate the disk installation operation member arranged on the panel to insert the clamp member located at a position facing the spindle. to the spindle side and engage the disk with the spindle. Also, when ejecting the disk,
The clamp member is separated from the spindle by the operation member, and the engagement between the disk and the spindle is released.

However, as devices become smaller and thinner, the space for the panel that forms the opening for inserting a disk has become smaller, the disk insertion opening has been formed into a thin slit, and the space around it has also been reduced. Therefore, when ejecting the disk,
A disk ejecting member that ejects the disk from the disk insertion opening to the outside of the apparatus when the spindle and the clamp member are disengaged by the operating member, since it becomes difficult to take out the disk from the slit. is provided.

[Problems to be Solved by the Invention] However, according to such a device, the operation of the clamp member for attaching the disk to the spindle, the operation of releasing the clamp member when ejecting the disk, and the operation of releasing the clamp member are required. The disk ejection member that ejects the disk to the outside of the device is
It is necessary to perform the loading and unloading operations of the disk in an orderly manner, and it is impossible to realize a disk drive device with good operability unless these operations can be performed smoothly and reliably by operating the operation buttons. Can not.

[Means for Solving the Problems] The present invention has been made with the aim of solving the above-mentioned problems, and its characteristics are as follows: an operation button 3 that is locked in a pressed position and returns to the release position by pressing in the pressed position; a spindle 6 that rotationally drives a disk 21 inserted through a disk insertion opening 2a formed on the front surface of the device; a clamp member 31 for pressing the disk brought onto the spindle through the disk insertion opening onto the spindle; and a clamp member 31 for pressing the disk onto the spindle; and a clamp member 31 for pressing the disk onto the spindle. a load arm 30 that supports the disk so as to be movable between the loaded position and the loaded position;
an eject member (eject plate 18 in the embodiment) that is moved in the disk insertion direction against the urging force during the disk insertion operation and ejects the disk from the disk insertion opening by the urging force when the disk is ejected; A locking member that locks the ejecting member at a predetermined position moved in accordance with the insertion operation of the disk and is released from the lock in response to a pressing operation of the operating button from the releasing position to the pressing position. In the example, the projection 4b) controls the load arm in conjunction with the forward pressing operation of the operation button from the release position to the pressing position, moves the clamp member, and mounts the disk on the spindle; The return operation of the unlocked eject member at a predetermined position is stopped, and the load arm is returned in conjunction with the return operation of the operation button from the pressed position to the release position, and the clamp member is moved from the spindle. A control lever (clamp lever 12 in the embodiment) that separates the disc and releases the engagement between the disc and the spindle and enables the eject member to eject the disc.

[Function] As a result, each time the operation button is pressed,
The operation of engaging the clamp member with the spindle to mount the disk, and the operation of releasing the clamp member from the spindle and ejecting the disk to the outside of the apparatus by the eject member can be performed alternately.

[Example] The details of the present invention will be described below based on the example shown in the drawings.

1 and 2 show an exploded perspective view and an assembled state of the drive device according to the present invention,
In the figure, the frame of the device designated by reference numeral 1 is formed into a housing shape having a bottom plate 1a, and a front panel 2 is fitted and fixed to the front side of the frame.
The front panel 2 has disk insertion openings 2a, 2a arranged vertically and parallel to each other, and openings 2b, 2 into which the clamp button 3 is fitted.
It has b.

A base 4 is fixed to the upper surface of the frame 1.
This base 4 has a large notch 4a through which a spindle, etc., which will be described later, is exposed.

The spindle motor 5 is attached using the bearing portion 1b of the frame 1 while facing the notch portion 4a. This spindle motor 5 has a spindle 6 on the upper side and another spindle 7 on the lower side of the bearing part 1b. A shield plate 8 is arranged below the spindle motor 5 to block noise generated from the spindle motor, and the spindle motor 5 is driven by a drive circuit mounted on a printed circuit board 9.

Protruding pieces 10, 10 are provided on the base 4 in a protruding manner to face each other, and a shaft 11 is horizontally suspended between the protruding pieces 10, 10. A clamp lever 12 is attached to this shaft 11.
The base of is rotatably supported.

The clamp lever 12 has an arm 12a at one end thereof, and the arm 12a faces toward a load arm 30 to which a center cone 31, which will be described later, is attached.

A button lever 13 is slidably provided on the upper side of the base 4 and on the side of the clamp lever 12. The button lever 13 has a pair of upwardly bent bent portions 13a, 13a at its rear end, and a shaft 14 is horizontally suspended between the bent portions 13a, 13a. The shaft 14 rotatably supports button rollers 15, 15 for transmitting the operation of the button lever to the clamp lever 12, and a clamp link 16 sandwiched between the two. A bent portion 13b bent upward is formed at the tip of the button lever 13.

One end of a shaft 17 is rotatably mounted on the other end of the clamp ring 16, and the other end of the shaft 17 has a protrusion 1 projecting from one end of the clamp lever 12.
It is rotatably supported on the shaft 2b.

The bent portion 13a side of the button lever 13 faces the opening 2b of the front panel 2, and the button 3 is fixed to the front end thereof.

An eject plate 18 is arranged below the button lever 13. This ejection plate 18 is the seventh
As shown in Fig. 11, the base 4 is slidably held at a predetermined height by guide pins 19 and 20 protruding from the base 4, and small diameter guide pins protruding from the respective pins. Elongated holes 18a, 18b are formed along the axial direction into which the projections 19a, 20a are fitted.

The width of the elongated hole 18a is wider than the width of the protrusion 19a, and the eject plate 18 moves in the longitudinal direction by the elongated holes 18a and 18b. It is designed to be able to rotate slightly within the width range of .

A bent portion 18c that engages with the arm 12c of the clamp lever is formed at the front end of the eject plate 18, and a downwardly bent bent portion 18d that engages with the front edge of the eject plate 18 when the disk is inserted. The seventh
11, the magnetic disk cassette 21 is installed through the underside of the base 4.
When the front edge of the disk cassette 21 comes into contact with the bent portion 18d of the eject plate 18, it is moved forward together with the disk cassette 21.

Further, a downwardly bent portion 18e is formed on the outer edge side of the eject plate 18 near the bent portion 18c. It is in a position where it can engage with a protrusion 4b protrudingly provided on the base 4.

Button levers 1 each placed on the base 4
3 and the eject plate 18, a latch 23 is disposed via a mounting plate 22 for latching the button lever 13 in the pressed position and releasing the engagement with the protrusion 4b of the eject plate 18 during clamping. The mounting plate 22 has one end bent upward in the shape of a crank so that it is one step higher.
This part becomes a bent part 22a facing the upper side of the button lever 13, and one end of the latch 23 passes through the bent part 22a and connects a spring 25 to a protruding pin 24. It is rotatably supported through the shaft.

The detailed structure and operation of latch 23 will now be described. That is, as shown in FIGS. 9 and 10A to 10C, the latch 23 is formed into a flat plate shape. That is, the latch 23 is rotatably supported on a pin 24 protruding from the mounting plate 22, and is always pressed toward the button lever 13 by a spring 25.

This latch 23 has a W-shaped notch 23a in a part thereof. As shown in FIGS. 9 and 10, this notch 23a is open on the left side and has two recesses 23b and 23c formed therein, and a recess 23c located on the back side has a groove on the lower surface. As shown in FIGS. 10A to 10C, a bulging portion 23d is formed which becomes convex toward the upper side. The button lever 13 then cooperates with a pin 26 protruding from the button lever 13 to perform the following operations.

In other words, when the button 3 is not pressed, the button lever 13 is positioned toward the front.
Pin 26 is not in contact with latch 23. When the button lever 13 is pressed in this state, the pin 26 also moves forward, following the curved section 23e formed on the open side edge of the notch 23a of the latch 23. In this case, latch 23 is connected to pin 2 as shown in FIG. 10A.
4 in the counterclockwise direction in the figure. When the pin 26 reaches the open end of the notch 23a, the pin 26 moves to the recess 2 located outside the notch 23a.
3b and is held in this state.

At this time, the force of the spring 25 (for example, a torsion coil spring) is applied in the clockwise direction in FIG.

When the button lever 13 is pressed again from this state, the pin 26 also moves forward, and as the latch 23 is rotated clockwise by the spring 25, the pin 26 is fitted into the recess 23c on the back side. However, recess 2
Since the lower side of the pin 3c communicates with the recess formed by the bulge 23d, the pin 26 is guided to the lower side of the bulge 23d. Since the button lever 13 is pulled toward the front by a spring (not shown), it moves toward the front together with the pin 26.

As a result, the pin 26 moves while pushing the latch 23 upward, returning to the state shown in FIG. 10A.

Further, a long hole 22b is formed in the bent portion 22a of the mounting plate 22, and a pin 26 is slidably fitted into the long hole 22b. moreover,
The bent portion 22a has an upwardly directed protrusion 22c.
and 22d are formed.

A holder 27 is arranged on the opposite side of the mounting plate 22 across the button lever 13. This holder 27 is used to attach a phototransistor for index detection, and has a protrusion 27a at one end.
is formed, and a spring 28 is attached to this protrusion 27a.
One end of the spring is fixed, and the other end of the spring is fixed to the projection 18f of the eject plate 18.
A rotational force is applied in the clockwise direction in FIGS. 7 and 11 within the width of the elongated hole 18a around the pin 20a.

A detector 2 consisting of a photointerrupter or the like for detecting a write protect notch on a disk is provided in a notch 4c formed on the side of the base 4.
9 is coming.

On the other hand, what is indicated by the symbol 30 is a load arm.
This load arm 30 is connected to the spindle motor 5.
A center cone 31 facing upward and holding a magnetic disk or the like mounted opposite the spindle 6 is rotatably supported on the lower surface of its tip via a spring 32. The rear end portion of the load arm 30 is fixed to the frame 1 side via a leaf spring 33. Therefore, the arm 12 of the clamp lever 12 is elastically supported in a cantilevered state, and the protrusion 30a protruding from the tip of the arm supports the arm 12 of the clamp lever 12.
It is engaged with the tip of a.

On the other hand, a head carriage 34 is attached below the base of the load arm 30. As shown in FIG. 1, the head carriage 34 has four support plates 35 arranged vertically and parallel to each other on its distal end side.
A head 36 is attached to the tip of each support plate 5 so as to face each other. The head carriage 34 has a protrusion 34a on its side, and is slidably guided by a guide bar 34c fitted in a guide groove 34b having an arcuate cross section formed on the lower surface of the protrusion 34a.

A support frame 38 to which a steel belt 37 is attached is fixed to the projecting piece 34a of the head carriage 34. As is well known, the steel belt 37 has a wide part and a narrow part, one end of each is fixed to the support frame 38, and the other end is fixed to the pulley 3.
It is fixed at 9. Further, the wide portion of the steel belt 37 has an elongated hole into which the narrow portion is fitted, and care is taken to prevent the narrow portion and the wide portion from overlapping each other.

The pulley 39 is fixed to the tip of an output shaft 40a of a stepper motor 40 attached to the frame 1 side.

The reference numeral 41 is a stopper that serves to keep the rotation angle of the stepper motor 40 within a certain range in order to prevent the movement of the head from changing within a certain range.

Reference numeral 42 designates a solenoid which is a driving source for moving the head pad up and down, and a pin 44 rotatably supported on the lower end of a link 43 is connected to the tip of a rod 42a of this solenoid. Further, rollers 45, 45 are supported on the shaft 44 on both sides of the link 43.

The pad arm 46 is formed into a substantially L-shape, and a U-shaped bent portion 46a formed at one end thereof is rotatably supported on a pin 47 above the solenoid 42. A pad 48 is fixed to the other end of the arm 46, and the head is loaded onto the disk in conjunction with the movement of the solenoid 42, and at this time the pad 48 is pressed against the disk to prevent the disk from shaking.

Further, one end of a pin 49 arranged parallel to the pin 47 is rotatably supported on the arm 46, and the other end of the pin 49 is rotatably supported on the upper end of the link 43. Therefore, when the solenoid 42 is driven, the link 43 is rotated via the rod 42a, and the arm 46 is rotated via the pin 49.
is rotated up and down about the pin 47.

Above the head carriage 34, a support frame 50 bent in an L-shape has its base end connected to the carriage 34.
The other end extends above the head carriage 34, and a spring 51 is loaded between the head carriage 34 and the tip of the support frame 50 to apply a constant load pressure to the head. ing.

A leaf spring 52 is arranged on the side of the head carriage 34 to remove play in the head carriage, and a sensor at the base end of the leaf spring 52 detects that the head is at the starting end of the track, that is, the home position. 53 is fixed.

The reference numeral 54 in FIG. 1 is a head protector provided to prevent damage to the head due to the insertion and removal of the disk.

Note that on the side of the printed circuit board 9 there is a symbol 55.
The reference plate shown with is a reference plate for adjusting the height of the disk to the head.

On the other hand, what is shown in FIG. 8 is a block diagram of a control circuit, which is controlled by a microcomputer MC.

In FIG. 8, the reference numeral 101 is a motor control circuit for controlling the spindle motor 5, and the spindle motor 5 is controlled via this circuit.
is controlled. Reference numeral 102 designates a select circuit, which generates a necessary select signal from a plurality of select signals and issues commands to each internal circuit.

What is indicated by the reference numeral 103 is a head load circuit.
Controls the solenoid 42 for performing head loading. 104 is a position control circuit for controlling the stepper motor 40; 105 is a detection circuit for receiving the signal from the sensor 53 and detecting the track 00 position; 106 is for transmitting or receiving information to a plurality of heads. It is a control circuit.

Further, the reference numeral 107 is an index detection circuit for performing index detection;
are a pair of ready circuits that generate ready signals based on index signals.

By the way, in Fig. 1 and Fig. 2, the mechanism for the upper disk of the two disks attached above and below is shown, but these clamp mechanisms, head load mechanisms, button latch mechanisms, and disk squeeze mechanisms are attached to the frame. It also exists under 1 in a symmetrical state.

Next, the operation of this embodiment configured as above will be explained in detail with reference to each figure, especially FIG. 11.

In the uninserted state where the magnetic disk 21 is not inserted into the upper insertion opening 2a of the front panel 2, the button lever 13 is slid toward the front by a spring (not shown), as shown in FIG. 11A. state, with its pin 26 in a position spaced apart from latch 23. Similarly, the eject plate 18 is also slid toward the front insertion port 2a by a spring 28. In this state,
The eject plate 18 is urged forward by the elastic force of the spring 28 and is also urged to rotate clockwise about the protrusion 20a as a fulcrum, and the bent portion 18e of the outer edge abuts against the protrusion 4b. As a result, its rotational position is maintained.

Further, since the button 3 is not pressed, the clamp lever 12 is not rotated in the clamping direction, and the load arm 30 to which the center cone 31 is attached is separated from the spindle 6, and the upper position of the arm 12a of the clamp lever 12 is regulated by. In this state, the other arm 12c of the clamp lever 12 is attached to the eject plate 1.
8, and are in a positional relationship where they do not come into contact with each other.

In this state, when the magnetic disk 21 is inserted from the insertion opening 2a on the upper side of the front panel 2, the disk 21 is inserted into the guide portion (the first (Fig.), contacts the bent portion 18d at the tip of the ejector plate 18, and inserts the ejector plate 18 all the way in while pushing it against the spring 28. The eject plate 18 has a bent portion 18
When the outer edge of the bent portion 18e disengages from the protrusion 4b, it is rotated clockwise by the elastic force of the spring 28, and the front edge of the bent portion 18e engages with the protrusion 4b and is locked in that position. will be stopped. Therefore, even if the disk is released at this point, the disk will not be ejected because the eject plate is locked at the insertion position.

Next, press the 11th button for clamping.
As shown in Figure C, the button lever 13 integrated with the button 3 moves forward.

In FIG. 2, the front, rear, left, right, and up and down directions are indicated by the letters X, Y, and Z, which are indicated by arrows in the figure, with + and - symbols added to them.

1 and 2, when the button lever 13 moves in the +X direction, the link 16 is rotated counterclockwise in FIG. axis 1
The arm 12 is rotated clockwise around 1.
The tip of a is the protrusion 30a at the tip of the load arm 30.
touch and press it downward. As a result, the load arm 30 is pushed in the -Z direction, and the disk is clamped between the center cone 31 attached to the load arm 30 and the spindle 6. In this state, the spindle motor 8 is rotated at a constant speed by a circuit on the drive board 9, and the disk is rotated at a predetermined rotation speed.

The head 36 is positioned using the head carriage 34.
This is done by moving the That is, the pulley 39 is rotated by the rotation of the step motor 40, and the steel belt 37 is wound and unwound to be moved in the +X or -X direction, thereby performing positioning. This movement is constantly monitored by the sensor 53. The guide bar 34 moves the carriage.
c, and is carried out smoothly without wobbling due to the pressing force of the leaf spring 52. Loading of the head 36 onto the disk is accomplished by removing the pressing force applied by the spring 51 through the support frame 50. In other words, by driving the solenoid 42 in the -Y direction, the link 4
3 rotates in the -Z direction, causing the pad arm 46 to rotate in the same -Z direction. The pad arm 46 supports the head arm, and the arm 46
The support for the head arm to rotate in the direction is removed and the force of the spring 51 loads the head onto the disk.

The operation of the eject mechanism when performing the above-mentioned clamping operation will be explained. In the state shown in FIG. 11B, when the button 3 is pressed to perform a clamping operation, the button lever 13 is slid in the pressing direction, that is, upward as seen in the figure, as shown in FIG. 11C. Upper pin 26 is latch 23
and rotate it counterclockwise. As a result, the eject plate 18 is pressed to the right by the latch 23 and rotated counterclockwise, thereby releasing the engagement between the bent portion 18e and the protrusion 4b, and the eject plate 18 is rotated counterclockwise. The spring 28 tries to slide the disk in the direction of ejecting it, but as the button lever 13 is pushed in, the clamp lever 12 is rotating to press the load arm 30 onto the disk, so that arm 12c is lowered to a position where its tip is opposed to the bent portion 18c of the eject plate 18, the eject plate 18 is locked by the arm 12c and prevented from retreating, and the disk receives a force in the ejection direction. do not have.

Then, by pressing the button 3 as hard as possible in the pressing direction and releasing it, the pin 26 passes over the sloped edge of the latch 23 and is latched at the position shown in FIG. 10B, and the button lever 13 is latched in the pressed position. Ru. FIG. 11D shows this state, in which the disk clamp state described above is maintained.

In addition, in the above operation, the clamp lever 1
When the disk is not inserted, the second arm 12c is connected to the eject plate 18 as shown in FIG. 11A.
When the disk is inserted, it is lowered to a position where it faces and locks the bent portion 18c of the ejector plate 18, as shown in FIG. 11C. Therefore, when no disk is inserted, pressing button 3 will cause button lever 1 to move.
3 and attempt to rotate the clamp lever 12 downward, the arm 12c will be locked to the upper surface of the eject plate 18, and its rotation will be prevented.
This is when no disk is inserted.
This means that the rotation of the clamp lever 12, that is, the operation of the button lever 13, is prohibited. That is, by performing the clamping operation with no disk inserted, it is possible to prevent the upper and lower heads from colliding with each other and causing damage.

On the other hand, the disk is kept in the clamped state and released by latching and unlatching the button lever 13 using the latch 23 and pin 26. That is, pressing the button 3 once activates the latch, and pressing the button a second time releases the latch.

Therefore, in the states shown in FIGS. 10B and 11D, by pressing the button 3 again, the latch 23 and pin 26 are unlatched, and the button lever 13 is returned to its original state by a spring (not shown). As a result, the clamp lever 12 is rotated in a direction away from the disk. As a result, the load arm 30 separates from the disk, the arm 12c of the clamp lever 12 separates from the bent portion 18c of the eject plate 18, and the eject plate slides due to the elastic force of the spring 28 to remove the disk. Discharge.

To summarize the above operations in order of operation, disk 2
1 is installed, the eject plate 18 moves simultaneously with the insertion of the disk, accumulates energy in the spring 28, and releases the shaft 20.
A clockwise rotational force is applied using a as a fulcrum. When the disk 21 is pushed until it is completely attached, a protrusion 4 protrudes from the base 4.
When b engages with the rear end of the bent portion 18e, the eject plate 18 is locked in the inserted position and maintained in the attached state.

When the button 3 is pressed to clamp the disk, the button lever 13 moves, the pin 26 protruding from the top surface moves, the latch 23 is rotated about the pin 24, and the eject plate 18 is moved to the second position. In order to push it to the right in Fig. 7, the protrusion 4b and the bent part 18e
On the other hand, as the button lever 13 moves, the clamp lever 12 is rotated clockwise in FIG. The spring 28 is engaged with the portion 18c to prevent the eject plate 18 from retreating by the spring 28.

To take out the disk 21, press button 3 again to release latch 23, and then press button lever 13.
is released, and in conjunction with the backward movement, the clamp lever is rotated counterclockwise in FIG.
When the engagement between the bent portion 18c and the eject plate 18 is released, the eject plate 18 is pulled by the tensile force of the spring 28, so that the disk 21 supported by the bent portion 18e moves backward, and the disk 21 is automatically ejected. Ru.

Although the above explanation is only for the disk mounted on the upper side, the same operation is performed for the disk on the lower side.

This embodiment has a structure in which the disk drive devices are stacked one above the other in this way, and a plurality of disks can be driven by a common drive source, and the heads can be moved by a common drive source. The number of parts can be reduced, the efficiency of use of mechanical parts can be improved, and the entire device can be made smaller.

Further, by sharing drive sources such as a spindle motor and a stepper motor, power consumption can be reduced.

In addition, in the above implementation, a structure that can drive two disks is illustrated, but it is possible to provide two spindle motors or to connect more disk holding mechanisms from one spindle motor via a power transmission means such as a belt. Of course, it is also possible to drive two or more disks.

[Effects of the Invention] As explained above, according to the disk drive device of the present invention, each time the operation button is pressed, the clamp member engages with the spindle to mount the disk, and the clamp member engages with the spindle to mount the disk. The operation of releasing the disk from the spindle and ejecting the disk to the outside of the device by the eject member can be performed alternately, and a disk drive device with good operability and reliable operation can be realized.

[Brief explanation of the drawing]

Each figure is for explaining one embodiment of the present invention.
The figure is an exploded perspective view, Figure 2 is an overall perspective view, Figure 3 is a perspective view showing the interlocking relationship between the clamp lever, button lever, and load arm, Figure 4 is a plan view, and Figure 5 shows the loading section by the solenoid. 6 is a side view for explaining the spindle portion, FIG. 7 is a perspective view showing the interlocking relationship between the eject plate and the clamp lever, FIG. 8 is a block diagram for explaining the control method, and FIG. Figure 9 is a perspective view showing the structure of the latch, Figures 10 A to C are explanatory diagrams of the operation of the latch, and Figures 11 A to D explain the interlocking relationship of the eject plate, button lever, clamp lever, and latch in the disk attachment/detachment operation. FIG. 1...Frame, 2...Front panel, 3...
... Button, 4 ... Base, 5 ... Spindle motor, 6, 7 ... Spindle, 9 ... Printed circuit board, 12 ... Clamp lever, 13 ... Button lever, 16, 43 ... Link, 18 ... Eject Plate, 23...Latch, 30...Load arm,
31...center cone, 34...carriage,
35... Support plate, 36... Head, 37... Steel belt, 39... Pulley, 40... Stepper motor, 42... Solenoid, 46... Pad arm, 53... Sensor.

Claims (1)

[Scope of Claims] 1. An operation button 3 that is locked in the pressed position by pressing from a released position that can protrude outward from the device, and returns to the released position by being pressed in the pressed position; and the front surface of the device. a spindle 6 for rotationally driving the disk 21 inserted through the disk insertion opening 2a formed in the disk insertion opening 2a; and a clamp member for pressing the disk brought onto the spindle through the disk insertion opening onto the spindle. 31; a load arm 30 that supports the clamp member in a movable manner between a position away from the spindle and a position where the disc is pressed and mounted on the spindle; energized,
an eject member 18 that is moved in the disk insertion direction against the urging force during the disk insertion operation and ejects the disk from the disk insertion opening by the urging force when the disk is ejected; a locking member 4b that locks at a predetermined position moved with the insertion operation and is unlocked in response to a pressing operation of the operation button from the release position to the pressed position; and the release position of the operation button. The load arm is controlled in conjunction with the pressing operation to the pressing position, the clamping member is moved, and the disk is mounted on the spindle, and the ejecting member, which has been unlocked at the predetermined position, is returned to its original position. and in conjunction with the return operation of the operating button from the pressed position to the released position, the load arm is returned, the clamp member is separated from the spindle, and the engagement between the disk and the spindle is released. and a control lever 12 that allows the eject member to eject the disk.