JPS60164955A - Disk device - Google Patents

Abstract

PURPOSE:To enable the titled device to obtain previous engagement of a disk and a rotary body at the time of insertion of the disk and to enable to obtain a specified rotation speed quickly by driving a motor at the time of recording and reproducing of data by driving the motor based on tdetection of insertion of the disk. CONSTITUTION:A switching transistor 23 is controlled based on outputs of a power source-on detecting circuit 32 and a disk insertion detecting circuit 33. For this purpose, a timer 36, an AND gate 37, an edge trigger circuit 38, an OR gate 39, an RS flip-flop 40, an OR gate 41 and an NAND gate 42 of open collector type are provided. Aside from driving based on a motor on signal, a motor 16 for disk rotation is rotated by a power source on detection signal and a disk insertion detection signal. Thus, previous engagement of the disk 2 and rotary body 11 becomes possible and recording and reproduction can be started quickly.

Description

TECHNICAL FIELD The present invention relates to a disk device for recording or internally generating data using a disk having a spindle insertion hole and a drive bin insertion hole, such as a microfloppy disk. .

BACKGROUND OF THE INVENTION Recently, a device for driving a flexible magnetic tissue by providing a drive bin in addition to a center spindle throat has been developed. According to this type of device, it is possible to downsize the magnetic disk. By the way, in this device, it is virtually impossible to position both the center spindle and the drive bin at the same time while phantom to the disk. It phantomly engages with the disc. Therefore, it becomes difficult to quickly write and read data.

OBJECTS OF THE INVENTION An object of the present invention is to provide a disk device that can quickly perform recording, reading, and reproducing.

Structure of the Invention To achieve the above object, the present invention is an apparatus for recording or reproducing data using a disk provided with a spindle insertion hole and a drive bottle insertion hole. a rotating body including a spindle inserted into the spindle insertion hole and a drive bottle inserted into the drive bottle insertion hole;
a motor that drives the rotary body to rotate the disk, a recording or reproducing head, a power supply terminal of this device, a switch provided between the electric terminal and the motor, and the rotary body. a disk insertion detection circuit that detects that the disk has been inserted on top of the disk, and a disk insertion detection signal obtained from the disk insertion detection circuit;
5. Turn on the switch to turn on the motor, and continue to turn on the switch for at least the time required to insert the drive bottle into the drive bottle insertion hole.1. The present invention relates to a disk device equipped with a circuit.

Effects of the Invention According to the first aspect of the invention, since the motor is driven based on detection of disk insertion, engagement between the disk and the rotating body can be established in advance when the disk is inserted. Therefore, when the motor is turned on during data recording and reproduction, it quickly reaches a predetermined rotational speed.

Embodiment Next, a magnetic disk device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9.

1 to 4 show a magnetic disk cartridge (1) used in this magnetic disk device. This cartridge +II is generally called a microfloppy disk, and a recording medium disk (2) with a diameter of 86 mm is housed in a rigid synthetic resin case f3J.
It is composed of The surface (4) of the case (3)
) and the back surface (5) have head insertion openings L61 (
71 is provided, and this opening t6J f7) is provided when not in use.
is closed by a sliding shutter (81).

The shutter (8) is biased to the right in FIG. 1 by a spring (not shown), and in use is moved to the left against this biasing force. Note that the shutter (81) is opened by placing an opening member (not shown) in the recess (91) of the case (3).
This is done by pressing the side of the shutter (8). The disk (2) of the disk cartridge (1) of this embodiment consists of a magnetic disk (2a) and a hub (2b) made of a magnetic metal disk mounted at the center of the disk (2). Since the disk +21 is not pushed out and rotated by a clamper, an opening 00) for rotational driving is provided only on the surface (5) of the case +31, and the hub (2b) is exposed from there. This hub (2b) is provided with a spindle insertion hole (2C) and a drive pin insertion hole (2d).

Figure 5 shows a rotating body U that engages the disk (2) at row 5 for recording or reproduction using the disk cartridge jl+.
Fig. 6 is a plan view of υ, and Fig. 6 shows a disk (2
) is an enlarged cross-sectional view showing a state in which they are engaged.

The rotating body (1) J has a spindle a4 and a drive bin (
131, and further includes a permanent magnet for attracting the metal hub (2b) at the center of the disk (2). In addition,
In order to easily achieve engagement between the drive pin Q31 and the hole (2d), the drive pin (131) is supported by a leaf spring and is freely displaceable in its axial direction.

When the disk (2) is engaged with the rotating body av, the disk (2) is inserted onto the rotating body light together with the case (3). At this time, of course, the spindle insertion hole (2C) of the disk (2) or the spindle (12
1K Position by matching. As a result, the spindle U is engaged with the hole (2C). but.

The drive pin a and the hole (2d) do not necessarily match, and if they do not match, the drive pin (t31 ±) and the hole (2b) are inserted.

The drive bin 03 (is pushed down against the spring α5).

After that, when the rotating body QU is rotated, the drive bin (13)
The positional relationship between the and hole (2d) changes, and finally the drive bin (
131 and the hole (2d) are aligned, and due to the upward biasing force of the spring (15), the 4 DI/J pin (131 enters the hole (2d) and the rotation body Uυ and the disk (2) are completely connected. As a result, a certain amount of time is required to engage the disk (2) and the rotating body U, and a motor-on signal is generated prior to recording/reproduction to turn the rotating body 01 on. ), the start of recording and playback is delayed by the time required for engagement. Furthermore, even if the disk +21 is once engaged with the rotating body (111), the engagement relationship between the disk +21 and the rotating body (111) may become incomplete due to photographing, etc. when the power is turned off or during the power-off period. There is that.

FIG. 7 shows a magnetic disk device that solves the above-mentioned problems. A rotating body α for rotating the disk (2) in the cartridge + illumination case (3) loaded in a predetermined position
υ is constructed as shown in FIGS. 5 and 6, and is directly connected to an outer rotor type motor (16) for rotating the disk.a7) (1~ are magnetic heads, which are connected to the carriage cod. It is attached to the disk (2) and guided so as to be movable in the radial direction of the disk (2).
A linear motion conversion mechanism (not shown) is operated to drive the carriage wing. In this embodiment, the stepping motor is a four-phase stepping motor having 818 windings, a second phase winding, a third phase winding, and a fourth phase winding. is driven by. however.

When the power is turned on, the head α7) Qllll is connected to the disk (2)
The first phase winding is energized in response to power-on detection, and the remaining phase windings are
At least one of the second to fourth phase windings is excited. This can prevent the rotor from stabilizing at a position corresponding to the third phase winding when the J phase winding is excited.

A transistor i23+ as a switching element and a motor control drive circuit c! are connected between the DC type terminal (221 and motor α6) of the device. 41 are provided. Therefore, the motor (16) rotates only while the transistor is on.

A light-emitting element (c) consisting of an LED and a light-receiving element (2) consisting of a phototransistor are used to detect a light reflection index (indicator) attached to the surface of the rotor blade (2).
! ll to detect the rotational angular position and rotational speed of the disk (2). In addition, the drive pin of one rotating body 0υ (1
31 and the light reflection index (27) have a certain angular positional relationship, the driving pin insertion hole (27) is inserted based on the detection of the index (27).
2d) position can be known. The light emitting element (c) is
In order to save power, the switching transistor 〇 is connected to the rear stage and is driven in synchronization with the motor Q6). The waveform shaping circuit-1 connected to the light receiving element (7!■) of the rotation detector (c) sends out a pulse according to the detection of the index (2'/l). The position of the drive pin insertion hole (2d) can be known, and the rotation speed can be determined from the mutual interval of these pulses.

Ready detection circuit 12 coupled to the output of waveform shaping circuit diagram J
One example is a circuit that detects when the recording or playback process is completed and is ready to proceed, and when a predetermined period of time has elapsed since the motor αe started rotating, and the rotational speed of the motor is 90% higher than the usual rotational speed.
Based on the fact that it becomes 0% or more, a high level ready detection signal is output.

The power-on detection circuit 32 is connected to the power terminal (221).

When power is supplied to the power terminal 32 and the voltage comparator detects that the power supply voltage has reached a constant value (for example, 90% of the normal voltage), a high-level tS on signal is sent out.

The connection is a disk insertion detection circuit, and the cartridge (1)
Based on a photocoupler consisting of a light emitting element and a light receiving element U (51) arranged in the insertion path of
is inserted onto the rotating body aυ, and generates a high-level disk insertion detection signal.

Power on detection circuit ji21321 and disk insertion detection slot 8
The switching transistor [
In order to control the timer (361, AND gate G371° edge trigger circuit 1381.OR)
An RS flip-frog t4tJ, an OR gate (4υ), and an open collector NAND gate (4) are provided.To explain these in more detail with reference to FIGS. 8 and 9, a timer (361 is a power-on Connected to the detection circuit 8 and 2.

8 (generates a low level output as shown in FIG. 8 FB+ for a certain period of time (approximately 12 m5) in response to the power-on detection signal generated at time t1 of AI. This timer (support)) 1. The low level period of ~[, corresponds to the period in which the single-phase excitation type stepping motor is multi-phase excited based on the power-on detection signal and the track zero position is reliably obtained.A.
G37) receives the output of the timer 1 and the output of the power-on detection circuit 13''21, and passes the power-on detection signal when the output of the timer 13'' reaches a high level. Therefore, at time 17 in FIG.
+ output becomes high level. The edge trigger circuit 1121 inputs the output of the AND gate 67), and the AND gate t3'? In response to the output of J rising to a high level at time point 13, a high level trigger signal of C1 is output as shown in FIG. The output is the input, and both signals are passed through. The set terminal S of the EtS flip frog +4 (II is connected to the output for the OR gate, and the reset terminal R is connected to the output of the ready detection circuit j. Therefore, the power is turned on at time 11 in Fig. 8. t, a high level output is sent from the Q output terminal as shown in FIG. 8 (1).
The temperature is turned off in response to the ready detection signal at the time. Also, as shown in Figure 9, <'t when the power is on? When a disk insertion detection signal is generated at this point, the flip 70 knob t41 is set at this leading edge.

One input terminal of the OR gate (411) is connected to the Q output terminal of the flip-flop (4), and the other input terminal is connected to the motor-on signal supply circuit (4).

The motor-on signal supply circuit is a circuit that generates a command to turn on a motor (+67) from an external device generally called a floppy disk controller.

Figure 8 (G's?, ~t, period, or Figure 9 <G C'
A high-level motor-on signal is generated during the period t g to tB.

The OR gate (4υ) passes both the high-level output of the flip 70 knob (4) and the motor-on signal of the motor-on signal supply circuit t121+43, and sends this output to the next stage's N
A N l) Gate (Give to one input of 4.N
AND game) (Since one input of 4'lr is connected to the disk insertion detection circuit (G), the 111-stage OFL game) +411 high level output is generated only when the disk insertion detection signal is generated. It passes through. The output terminal of NAND gate +421 is connected to the base of transistor 231. During the period when a high-level disk insertion detection signal is generated from the NAND gate (4 and 4) of the disk insertion detection circuit, a high-level output is generated from the flip-flop (41) or the motor-on signal supply circuit (4 and 4). It is in a low level (L) output state only during this period.

Therefore, the switching transistors are as shown in FIGS. 8 and 9, 12 to 13.1. ~t6゜t
It is turned on only during periods 7 to t8, t, and t11, and only during this period, the motor (16J) is driven and the light emitting element (2
Power is supplied to 8j.

Next, the operation of this device will be described. When power is supplied to the power terminal 2 while the disk (2) is inserted on the rotating body, the 7 lip-flop t4tJ is activated in response to the power-on detection signal shown in Figure 8 (AI). is set, the transistor is turned on, and the motor (16) is driven.As a result, the single rotating body rotates.

The engagement between the drive pin (131 and the hole (2d) is established.When the rotational speed of the disk (2) increases and a ready detection signal is generated at time 11, the flip 70 knob (41) is set at the first moment. , the transistor 231 is turned off, the rotation of the motor α6j is stopped, and the current of the light emitting element (28) is cut off.Therefore, power consumption is reduced.

If the rotating body Uυ is rotated at the gate where the ready detection signal is generated, a perfect anchorage state between the disk (2) and the rotating body συ can be obtained.

After that, when a motor-on signal is generated at time 14 in FIG. 8, the transistor @ is turned on again.

Rotation of the motor Qfil and light emission between the light emitting elements start.

Even if the motor (161) rotates at time 16, the disk (2
) and the rotating body 0υ is performed in advance during the period t to t3 (・, so the engagement operation between the two is not substantially performed,
Disk (2) immediately starts rotating. Therefore, a recordable or reproducible state (ready state) can be quickly obtained.

When the disk (2+) is moved away from the rotating body (beating up) in this device, the disk insertion detection circuit (the output of the rib becomes the 1 degree level, and is a NAND game). In addition, the transistor becomes OFF.As a result, the power supply circuit for the motor (16) and the light emitting element e81 is cut off.

Power is saved.

As shown in FIG. 9, when the power is on and a disk (2) is inserted at time s'7, a disk insertion detection signal is generated and flip-flop +41J is set.

As a result, the transistor (c) turns on.

The motor (I61) starts rotating and the light emitting element 081 starts emitting light.

Then, the motor (I6) rotates at the 18th time point when the ready detection signal is generated. As a result, engagement between the disk (2) and the rotating body Uυ is established. When the 7 lip flops (4) are reset at time ts, the transistor is turned off and the power supply to the motor (16) and light emitting element (only) is stopped, resulting in a power saving state of 1.Then, at time 10, the motor on signal is activated. When this occurs, the power supply to the motor (16) and the light emitting element pre-immersion starts.The rotating body αυ and the disk (
Since the engagement with 2) has already been established during the period st7 to t8, a disk rotation state in which recording and reproduction are possible can be obtained quickly. If a ready detection signal is generated at time h110 after setting, the recording/reproducing state becomes possible.

As is clear from the above, the apparatus of this embodiment has the following advantages.

A) In addition to driving based on the motor-on signal, since the disk rotation motor (161) is rotated by the power-on detection signal and the disk insertion detection signal, the engagement between the disk (2) and the rotating body Uυ is established in advance. It is possible to set the recorder to start quickly.

Since the motor (161) is shut off in synchronization with the generation of the ready detection signal without continuing the rotation of the motor (161) by the CBl ta'j on detection signal and the disc insertion detection signal, an increase in power consumption can be suppressed. .

(('1) Power is supplied to the light emitting element (to) by motor a.
Since it is controlled according to the phrase and PJ, the power saving effect is large.

(1) Since the setting of the flip-flop (4t1) by the tortoise-on detection signal is delayed, there is a time difference between the driving of the stepping motor (161) and the driving of the disk rotation motor (161) when the power is turned on. can be given, and the capacity of the electric circuit connected to the power supply terminal can be reduced.
I is also driven by the power supplied from the power supply terminal S2.

Variations The invention is not limited to the embodiments described above.

For example, the following variations are possible.

It is also possible to set a line for inputting the output of the edge trigger circuit G38+ to the OR gate 6 and set the flip-flop 4 (J) to the input of the output of the edge trigger circuit G38+.

(bl) The motor-on signal is generated at F~tIIst,~t8 period 1'Jj.

(cl Disk rotation detector 5) may be configured by a combination of a magnet and a magnetoelectric conversion element. In this case, the configuration is such that the power of the magnetoelectric conversion circuit is turned on and off by a switch C23).

fdl It is also possible to use a photoelectric method to detect disc insertion, or use a microswitch, etc. to detect the insertion of a disc (゛.

(el 7 lip-flop t4[j is ready detection circuit 6
Instead of using the output of 1) to generate a reset signal based on the detection of disk rotation, it is also possible to use this to reset the clock. A reset signal of 7 lip-flops + 41j may be generated when this timer reaches a certain time (for example, 420 ms).

(fl) In this embodiment, a clamp part facing the disk rotating body Uυ is not provided, but it can also be applied to an apparatus using a clamp part.

[gJ] The present invention can also be applied to a device that has an index hole in the magnetic disk (2) and uses this index hole to detect the rotational position and speed.

fhl If the capacity of the power supply is large or if it is not necessary to drive the stepping motor @) when the power is turned on,
t1 to t in FIG. 8! It is also possible to set a flip-flop (4 cycles) without giving a delay of .

[Brief explanation of drawings]

1 to 9 are for explaining a magnetic disk device according to an embodiment of the present invention, FIG. 1 is a plan view of a magnetic disk cartridge, and FIG. 2 is a bottom view of the cartridge shown in FIG. 1. , Fig. 3 is a plan view showing the cartridge shown in Fig. 1 with the shutter opened, Fig. 4 is the car shown in Fig. 1)
Front view of IJ Tsuji. FIG. 5 is a plan view showing a rotating body of the disk device, FIG. 6 is an enlarged sectional view showing a state where the rotating body and the disk are stopped, and FIG. 7 is a block diagram of the disk device. Figures 8 and 9 show the status of the stakes in Figure 7) to (0 points).
- Waveform diagram. il+... Cartridge, (2)... Magnetic disk, (2b)... Knob, (2c) (2d) ° hole,
(3)...Case, ttU...Rotating body. (1 motor spindle, (131... drive bin, ■)
・Magnet, shout...Disk rotation motor, G7) (11(
)...Magnetic head, G9)...Carriage, (2t
ll...Stepping motor, 1221...Electric terminal, cap)...Switching transistor, G51
...Rotation detector, (28!...Light emitting element, 6υ・
・Ready detection circuit. 621...IL source on detection [alN, G33+...
Tisfu insertion plug circulation 8, (4IJ...RS flip 7
0 knob, IQ...Motor on signal supply circuit. Agent Noriji Takano

Claims (1)

[Scope of Claims] (A device for recording or reproducing data using a disk provided with a spindle insertion hole and a drive bottle insertion hole. A spindle inserted into the spindle insertion hole and the drive bottle. A rotating body including a drive bottle inserted into the bottle insertion hole. A motor that excites the rotary body to rotate the disk. A recording or reproducing head, and a housing terminal of this device. a switch provided between the [4 terminal] and the motor; a disk insertion detection circuit that detects that the disk is inserted onto the rotating body; a disk insertion detection circuit that detects the insertion of the disk from the disk insertion detection circuit; When the signal is obtained, the switch is turned on so as to turn on the motor, and the switch is kept on for at least the time necessary to insert the drive bottle into the movement bottle insertion hole. +21 The on time of the switch based on the disk insertion detection signal is the time until the rotational speed of the disk reaches around the normal rotational speed. A disk device according to claim 1.