JPS58169369A - Disk driving device - Google Patents

Abstract

PURPOSE:To hold a driving source of two disks in common, and to make the structure simple and small in size, by constituting so as to install the disk to the upper and lower parts of a spindle motor, and driving two heads by one motor. CONSTITUTION:In the center of a frame 1, a spindle motor 5 is fitted, and on its upper part, a load arm 30 is placed, and a clamp mechanism consisting of a clamp lever 12, etc., and an ejecting mechanism, etc. consisting of an eject plate 18, etc. are provided. This mechanism has the same structure as to a disk installed to the lower side of the motor 5, too. On the other hand, on the lower part of the base part of the load arm 30, a head carriage 34 is provided, and two heads 36 are fitted opposingly, and are driven by a step-motor 40. Therefore, two disks are driven by the motor 5, and the 2 heads 36 are driven by the motor 40, therefore, the structure can be made simple and small in size.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disk drive device, and more particularly to a disk drive device capable of driving a plurality of flexible magnetic disks housed in a cassette.

Conventionally, this type of drive device was configured to drive one disk with one device, so in a system using multiple disks, multiple drive devices are provided, and one drive device drives one disk. If only one drive unit is used, the other drive units are in a standby state, so the usage efficiency of the drive units is halved.

Further, when a plurality of drive devices are provided, a large space is required depending on the number of drive devices, and space efficiency decreases. Furthermore, if multiple drive devices are required, multiple spindle motors or stepper motors must be used as the drive source, which results in losses in terms of both cost and power consumption. It is large and requires a control circuit to control each drive device.The present invention was made to eliminate the above-mentioned drawbacks of the conventional technology, and it is possible to drive multiple disks with one device. It is an object of the present invention to provide a disk drive device configured to perform the following functions.

In order to achieve the above object, the present invention (2) adopts a structure in which a disk holding mechanism, a recording/reproducing head, and a head loading mechanism are provided on both sides of a base provided in the frame of the apparatus.

Hereinafter, the present invention will be described in detail based on Example I shown in the drawings.

FIGS. 1 and 2 show the disassembled and assembled states of the drive device according to the present invention, and the frame of the device, designated by reference numeral 1 in the figures, is formed in the shape of a casing having a bottom plate 1a. A front panel 2 is fitted and fixed to the front side thereof. The front panel 2 has disk insertion slots 2a, 2a arranged vertically in parallel, and further has openings zb, ib into which a button 3 for a C varnish lamp is fitted.

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.

With the spindle motor 5 facing this notch 4a,
is attached using the bearing portion 1b of the frame 1.

This spindle motor 5 has an upper varnished spindle 6,
Another spindle 1 is provided below the bearing part 1b. A shield plate 8 is arranged on the lower side ζ- of the spindle motor 5 to block noise generated from the spindle motor, and the spindle motor 5 is driven by a driving printed circuit board 9 on which a driving circuit is mounted.

Projecting pieces 10, 10 are protruded from the upper part of the base 4, and a shaft 11 is horizontally suspended between the projecting pieces 10, 10.

A base portion of a clamp lever 12 is rotatably supported on this shaft 11 with two shafts.

The clamp lever 12 has an arm 12a at one end.
2a faces the direction of the head arm, which will be described later.

A button lever 13 is slidably provided above the base 4 and to the side of the clamp lever 12. The button lever 13 has a pair of bent portions 1 bent upward at its rear end.
3a and L3a, and a shaft 14 is horizontally suspended between the two.

The shaft 14 includes button rollers 15, 15 for transmitting the operation of the button lever to the clamp lever 12, and button rollers 15, 15 between the two (
The clamp link 16 can rotate freely (=
It is mounted on a shaft. The tip end &: of the button lever 13 is formed with a bent portion 13b that is bent upward. The other end of the shaft 17 is rotatably supported by a projection 12b projecting from one end of the clamp lever 12.

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. As shown in FIG. 7, the eject plate 18 is slidably held at a predetermined height by two guide bins 1θ and 20 protruding from the base 4. A long hole 18m along the axial direction is formed into which the small diameter projections 19a, 20a are fitted.

A bent portion 18c is formed at the front end of the eject plate 1B, and a bent portion 18d is formed downward at the tip.
As shown in FIG. 7, the leading end of the magnetic disk cassette 21 mounted through the underside of the base 4 comes into contact with the bent portion 18d of the eject plate 18, and is advanced when the cassette 21 is mounted.

Further, a bent portion 18e is formed downward on the outer edge side of the eject plate 18 near the bent portion 18c, and this bent portion 18e is formed on the base 4 (-to engage with the protrusion 4b). It is in a position where it meets.

A latch 23 is mounted above the button lever 13 and the eject plate 18, which are arranged in a vertically overlapping manner, with a plate 22 interposed therebetween. For installation, one end of the plate 22 is bent upward in an L-shape to make it one step higher, and this part is the bent part 2 facing the upper side of the button lever 13.
2a, and one end of the latch 23 is rotatably supported on the upper side of the bent portion 22a via a spring 25 to a pin 24 extending through the bent portion 22a.

By the way, the detailed structure and operation of the latte 23 will be explained as follows. That is, FIG. 9 and FIG. 10 4-(C
), the latch f-23 is formed into a flat plate shape. That is, the latte 23 is rotatably supported on a pin 24 protruding from the button lever 13 side, and is constantly pressed toward the button lever 13 side by a spring 25.

This latch 23 has a notch 23'a formed in a part (=W-shape). This notch 23a is open on the left in FIGS. 9 and 10. 23
Since a is formed in a W-shape, there are two recesses 23 b,
The lower surface of the recess 23c located on the back side and having a diameter of 23 c'' is formed with a bulge 23d that is convex upward as shown in FIGS. 10(3) to 10(C). The following operations are carried out in cooperation with a pin 26 protruding from the top 13.

That is, when the button 3 is not pressed, the button lever 13
is located on the front side, so the pin 26 is placed on the latte 23
When the button lever 13 is pressed in a state where it is not in contact with the button lever 13, the pin 26 moves forward and moves along the curved part 23eC formed on the open side edge of the notch 23a of the latch 23. In this case, the latch 23 is rotated counterclockwise about the pin 24 as shown in FIG. 10(3). When the pin 26 reaches the open end of the notch 23a, the pin 26
is fitted into the recess 23b located outside the notch 23a, and is maintained in this state.

At this time, the spring 25 (for example, a torsion coil spring)
The force is applied in the clockwise direction in Fig. 10.

When the button lever 13 is pressed again from this state, the pin 2
6 also moves forward, and as the latch 23 is rotated clockwise by the spring 25, the pin 26 fits into the recess 23c on the back side. However, since the lower side of the recess 23c communicates with the recess formed by forming the bulge a 23 d, the pin 26 is guided to the lower side of the bulge 23d. and,
Since the button lever 13 is pulled toward the front by the spring, 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. 10(A).

Further, for attachment, a long hole 22b is formed in the bent portion 22a of the plate 22, and a pin 26 is slidably fitted into the long hole 22b. Furthermore, projections 22c and 22d are formed upwardly on the bent portion 22a.

For attachment, a holder 27 is placed on the opposite side of the plate 22 across the button lever 13. This holder 27 is used to attach a phototransistor for index detection, and a protrusion 27a is formed at one end of the holder 27.
One end of the spring 28 is fixed to the spring 28, and the other end of the spring is fixed to the protrusion 18f of the eject plate 18.
The eject plate is rotated clockwise in FIG. 7 about pin lla.

A detector 29 consisting of a photo-interrupter or the like for detecting a write protect notch on the disk faces the side of the disk 4 (the cutout 4C formed therein).

On the other hand, the reference numeral 30 denotes a load arm, which faces above the spindle motor 25, and has a center on the lower surface of its tip that holds a magnetic disk or the like mounted opposite the spindle 6. cone 3
1 is rotatably supported 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 protrusion 3 protruding from the tip of the arm is elastically supported on a cantilever.
0a is the tip of the arm 12a of the clamp lever 12): engaged.

On the other hand, a head carriage 34 is attached below the base of the load arm 30. As shown in FIG. 1, the carriage 34 has four support plates 35 arranged vertically in parallel (=) on its distal end side, and the distal end of each support plate 35 (= indicates that the heads 3B are facing each other). installed.

~ The Rad Carriage 34 has a protruding piece 34a on its side,
An arcuate guide groove 34 formed on the lower surface of this projecting piece 34a
It is slidably guided by a guide bar 34 that is fitted in b.

A support frame 38 to which a staple 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, each of which has one end fixed to a support frame 38 and the other end fixed to a pulley 39. 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, which is used to prevent the head from moving beyond a certain range.
It plays the role of keeping the rotation angle within a certain range.

The reference numeral 42 is a solenoid that is a driving source for moving the herad pad up and down.

A pin 44 rotatably supported on the lower end of the link 43 is connected to the tip of the rod 42a.Rollers 45 and 45 are also supported on the shaft 44 on both sides of the link 43.

What is indicated by the reference numeral 46 is a pad arm, which is formed in an L-shape, and has a U-shaped bent portion 4 formed at one end thereof.
6a 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 this pad 48 loads the head onto the disk in conjunction with the movement of the solenoid 42, thereby preventing the disk from wobbling.

Further, one end of a pin 49 arranged parallel to the pin 47 is rotatably supported on the arm 46.
The other end 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 vertically about the pin 47 via the pin 49.

A support frame 50 bent into an L-shape according to the information of the carriage 34 is attached with its base end fixed to the carriage 34 side (2 □), and the other end is attached to the carriage 34 side (2 □).
A spring 51 is elastically mounted between the carriage 34 and the tip of the support frame 50, and applies a constant load pressure to the head.

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

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

Note that a reference plate 55 on the side of the printed circuit board 9 is used to adjust 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, reference numeral 101 indicates a motor control circuit for controlling the spindle motor 5, and the spindle motor 5 is controlled via this circuit. code 1
02 is a select circuit that generates a necessary select signal from a plurality of select signals and issues commands to each internal circuit.

The reference numeral 103 is a helad load circuit, which controls the solenoid 42 for head loading. 104
105 is a position control circuit for controlling the stepper motor 40; 105 is a detection circuit for receiving a signal from the sensor 53 and detecting the track position; and 106 is a detection circuit for transmitting or receiving information to a plurality of heads. It is a control circuit.

Further, reference numeral 107 indicates an index detection circuit for detecting an index, and reference numeral 108 indicates a pair of ready circuits that generate a ready signal based on the index signal.

By the way, Figures 1 and 2 (=show the mechanism for the upper disk of two disks installed above and below), but these clamp mechanisms, head roll mechanisms, button latch mechanisms, and media eject mechanisms are It also exists under the frame 1 in a symmetrical state.

Next, the operation of this embodiment configured as described above will be explained.

First, when the magnetic disk 21 is inserted from the insertion opening 2a on the upper side of the front panel 2, the disk advances along the guide section made up of the frame 1 and the base 4, and the magnetic disk 21 is inserted into the bending section at the tip of the eject plate 18. 18d, and while pushing the eject plate 18, it is inserted to the back (2).

Next, when the clamp button 3 is pressed, the button lever 13 integrated with the button 3 moves forward.

In the following explanation (:), the front, rear, left, right, and up and down directions are indicated by adding + and - signs to the x, y, and z numbers shown by arrows in FIG.

When the button lever 13 moves in the +X direction, the link 16
is rotated counterclockwise in FIG.
The arm 12a is rotated twice in the clockwise direction C, and the tip of the arm 12a comes into contact with the protrusion 30a at the tip of the load arm 30:11, and pushes it downward (twice).

As a result, the load arm 30 is pushed in two directions, which causes the attached center cone 31 and spindle 6
The disc is clamped between the

In this state, the spindle motor 8 is rotated at a constant speed by the drive substrate 9 (2), causing the disk to rotate at a predetermined rotation speed.

The head 36 is positioned by moving the helad carriage 34. That is, the rotation of the stepper motor 40 causes the pulley 3g to rotate, winding up and unwinding the steel belt 37! Positioning is performed by moving in the +X or -X direction from the second position. This movement is caused by the sensor 53
is constantly monitored. The carriage is moved while being guided by the guide bar 34, and is carried out smoothly without wobbling due to the pressing force of the leaf spring 52.

The head 36 is loaded onto the disk by removing the pressing force applied by the spring 511 via the support frame 50. In other words, the - of the solenoid 42
The link 43 rotates in twelve directions by driving in the Y direction,
The pad arm 46 is rotated in the same two directions. The pad arm 46 supports the helad arm, and since the arm 46 is rotated in the -2 direction, the support for the helad arm is removed, and the head is loaded onto the media by the force of the spring 51.

On the other hand, the latch 23 and the bin 2 hold and release the disc.
6. That is, pressing the button 3 once activates the latch, and pressing the button a second time releases the latch.

By the way, when the disk 21 is mounted, the eject plate 18 moves at the same time, and energy is stored in the spring 28, and a rotational force about the axis C is applied as a fulcrum. When the disk 21 is pushed to the completely installed state, the protrusion 4b protruding from the base 4 engages with the rear end of the bent portion 18e, thereby locking the disc 21 and maintaining the installed state.

When the button 3 is pressed to clamp the disc, the button lever 13 moves, and the bottle 26 protruding from its upper surface moves.The latch 23 is rotated around the bottle 24, and the eject plate 18 is moved. Since the projection 4b is pushed to the right in FIG. 7, the engagement between the projection 4b and the bent portion 18e is lost.

On the other hand, due to the movement of the button lever 13, the clamp lever 1
2 is the 7th factor, clockwise 1: Due to the rotation, the protrusion 12c protruding from the side opposite to the arm 12m lowers and engages with the bent portion 18c of the eject plate 18, causing the eject plate 18 to be rotated by the spring 28. Prevent retreat.

To take out the disc 21, press the button 2 again to release the latch 23, release the button lever 13, and in conjunction with its backward movement, the clamp lever is rotated counterclockwise in FIG. When the eject plate 18 is disengaged from the bent portion 18c, the eject plate 18 is pulled by the tensile force of the spring 28, so that the disk 21 supported by the bent portion 18e1m retreats, and the disk 21 is automatically ejected. .

Although the above explanation is only for the upper C: the mounted disk, the same operation is performed for the lower disk as well.

Since this embodiment is configured as described above, a plurality of disks can be driven by a common drive source, and the heads can be moved by a common drive source, which reduces the number of parts and improves the usage efficiency of mechanical parts. It is possible to improve the performance and downsize the entire device.

Furthermore, power consumption can be reduced by sharing drive sources such as spindle motors and stepper motors.

In the above embodiment, a structure capable of driving two disks was exemplified, 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 by driving.

As is clear from the above description, the present invention employs a structure in which a single disk drive mechanism and carriage drive mechanism are shared by multiple disks, reducing the number of parts and simplifying the structure. An excellent effect can be obtained in that the device can be simplified, the device can be made smaller, and the manufacturing cost can be significantly lowered.

[Brief explanation of drawings]

The drawings are for explaining one embodiment of the present invention, and FIG. 1 is an exploded perspective view, FIG. 2 is an overall perspective view, FIG. 3 is a perspective view showing the interlocking relationship of the clamp lever, button lever, and load arm, and FIG. 4 is a plan view, FIG. 5 is a rear view showing the loading mechanism using a solenoid, FIG. 6 is a side view illustrating the spindle portion, FIG. 7 is a perspective view showing the interlocking relationship of the eject plate with the clamp lever, and FIG. Figure 8 is a block circuit diagram explaining the control method, Figure 9 is a perspective view showing the structure of the latch, and Figure 1.
0 (8) to (C) are diagrams explaining the operation of the latch. 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 3
7...Steel belt 3g...Pulley
40...Stepper motor 42...Solenoid
46...ノ (rad arm 53... Senna Figure 7 = 369- Figure 8

Claims (3)

[Claims] (1) At least one spindle motor is sandwiched between a clamp mechanism and an eject mechanism for different disks, and the carriages for recording and reproducing data on different disks are controlled by a single drive source. A disk drive device characterized by: (2) The disk drive device according to claim 1, wherein a plurality of disks are rotationally driven by one spindle motor. (3) The disk drive device according to claim 1, wherein a plurality of magnetic heads are provided on a carriage controlled by one drive source.