JPH03162771A - Disk device - Google Patents

Abstract

PURPOSE:To quickly start recording and reproduction by rotating a disk rotating motor with a power-on detection signal and a disk insertion detection signal to preliminarily engage a disk with a body of revolution independently of driving based on a motor on signal. CONSTITUTION:When a disk 2 is inserted on the body 11 of revolution and power is supplied to a power terminal 22 in this state, a flip flop 40 is set in response to the power-on detection signal and a transistor TR 23 is turned on to drive a motor 16. Consequently, the body 11 of revolution 11 is rotated also, and a driving pin 13 and a hole 2d are engaged with each other, and the TR 23 is turned off to stop the revolution of the motor 16. When the motor-on signal is generated thereafter, the TR 23 is turned on again, and the revolution of the motor 16 and light emission of a light emitting element 28 are started, and the disk 2 immediately starts the rotation since the disk 2 and the rotating body 11 are already engaged with each other. Thus, the recordable and reproducable state is quickly attained.

Description

Detailed Description of the Invention [Technical Field] The present invention relates to recording or reproducing data using a disk, such as a microfloppy disk, which has a spindle hole and a drive pin hole. This invention relates to a disk device for performing L.

[Prior Art] Recently, a device has been invented which drives a flexible magnetic disk by providing a drive pin in addition to a center spindle.

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 pin with respect to the disk at the same time, and the drive pin is not positioned relative to the disk after the center spindle has engaged with the disk. to engage. Therefore, it becomes difficult to quickly write and read data.

[Object of the Invention] Therefore, an object of the present invention is to provide a disk device that can perform writing (recording) or reading (reproduction) quickly and can save power.

[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 pin insertion hole, wherein the spindle insertion hole a rotating body having a spindle inserted into the drive pin and a drive pin extending into the drive pin insertion hole; a disk rotation motor coupled to the rotation body for rotating the disk; and a recording or reproducing head. a feeding motor for feeding the head in the radial direction of the disk; a power terminal of this device; a switch provided between the power terminal and the disk rotation motor; a power-on detection circuit for detecting the start of power supply; a delay signal forming circuit for forming a signal obtained by delaying the power-on detection signal obtained from the power-on detection circuit by a certain period of time; a rotation detector that detects the rotation of the disk based on detection of a motor or an index provided on the disk; and a rotation detector that detects that the rotation speed of the disk has reached a substantially normal rotation speed based on the output of the rotation detector. a ready state detection circuit for detecting a ready state, a motor on signal supply circuit for supplying a motor on signal of 0 (zero) for instructing to drive the previous motor on;
The switch is controlled to be in the on state while the motor on signal is being generated, and the switch is controlled to be in the on state when the signal delayed by the certain period of time is obtained from the delayed signal forming circuit, and the switch is controlled to be in the ready state Yokoyama. The present invention relates to a disk device including a switch control circuit that particularly controls turning off the switch, in which an output indicating that the substantially normal rotational speed has been reached is obtained from the circuit. Incidentally, the delayed signal type or circuit can be composed of, for example, a timer (36), an AND gate (37), and an edge 1 trigger (38) shown in the first embodiment.

[Actions and effects of the invention] The present invention has the following effects.

(b) In response to the delayed power-on detection signal, the switch turns on and the disk rotates.

Therefore, it becomes possible to establish engagement between the disk, the spindle, and the drive pin after a certain period of time after the power is turned on.
Subsequent recording or playback can be started quickly.

(b) When a ready state is detected after the disk starts rotating due to the delayed signal of power-on detection, the switch is turned off as soon as an output indicating that the rotation speed has almost reached the normal rotation speed is obtained. The present invention relates to a disk device equipped with a switch control circuit that performs a switch control circuit. Note that the delayed signal forming circuit can be composed of, for example, the timer (3B), the AND gate (37), and the edge trigger (38) shown in the embodiment.

[Actions and effects of the invention] The present invention has the following effects.

(a) In response to the delayed power-on detection signal l7, the switch turns on and the disk rotates.

Therefore, it is possible to disengage the disk from the spindle and drive pin after a certain period of time after the power is turned on.
Subsequent recording or playback can be started quickly.

(b) When the ready state is detected after the disk starts rotating due to the power-on detection delay signal, the diameter 86
It is constructed by housing a recording medium disk (2) of mm in diameter in a rigid synthetic resin case {3}. Both the front side (4) and the back side (5) of the case (3) are provided with an opening for people (G) (7), and when not in use, this opening (G) (7) can be used as a sliding shirt (
8) is closed. The seat lever (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.

To open the shaft (8), use the fourth part (9) of the case (3).
), place the opening member (not shown) on the shirt (
8) by pressing the sides. The disk {2} of this disk cartridge on the implementation side... has a magnetic seal.
} (2a) and a hub (2b) made of a ridged metal disc wrapped in a bag in the center. The disc (2) is not rotated by pressing it with a clamper, so the case (
An opening (IG) for rotational driving is provided only on the back surface (5) of 3), from which the hub (21) is exposed. This hub (2b) is provided with a spindle insertion hole (2C) and a drive pin insertion hole (2d).

Figure 5 shows a rotating body (2) that engages with the disk (2) when recording or reproducing using the disk cartridge (11).
Fig. 11) is a plan view, and Fig. 6 is an enlarged sectional view showing the state in which the disc (2) is engaged with the oral transmission body (11).

The rotating body (11) has a spindle Tla and a wA moving pin (+3) in the center, and has a permanent capstone 04 for adsorbing the metal hub (21) at the center of the disk {2). In addition, in order to easily achieve engagement between the XK moving pin (11) and the hole (2d), the driving pin (13) is supported by a leaf spring (15l) and is freely variable in its axial direction.

When the disk (2) is engaged with the rotating body (I1), the disk (2) is inserted onto the rotating body 011 together with the case (3). At this time, of course, disk (2)
Position the spindle insertion hole (2c) so that it matches the spindle (!■) of the rotating body (11).As a result,
・Engagement with the hole (2c) of the spindle (13) is established. However, the drive pin (13 and the hole (2d) do not necessarily match, and if they do not match, the drive pin 0'5 The nopu (2b) is placed on top, and the drive pin (13l is the spring (1)
It is pushed down against 9. After that, when the rotating body (mark) is rotated, the positional relationship between the drive pin (131 and the hole (2d) changes), and finally the position of the drive pin (131 and the hole (2(+)) matches, and the spring (1 The drive pin (eye) enters the hole (2d) by the upward force of the two, and complete engagement between the rotating body (11) and the disk (2) is established.In this way, the disk (2) and the rotating A certain amount of time is required to engage the body (I!), and if a motor-on signal is generated prior to recording and the rotating body circle is rotated, a certain amount of time is required for the engagement. The start of recording and playback is delayed by a certain amount of time.Furthermore, even once the disk (2) is engaged with the rotating body α1),
There is a possibility that the engagement relationship between the disk (2) and the rotating body 01) may become incomplete due to vibrations or the like when the power is turned off or during the power off period.

Figure aJ, 7 shows a dramatic disk device that solves the above-mentioned problems. A rotating body (11) for rotating the disk (2) in the case (3) of the cartridge (1) loaded in a predetermined position is constructed as shown in FIGS. 5 and 6,
Outer rotor type motor for disc conversion (used in the old model) (one tank is a direct air head, and a carriage
4, and is housed in a certain place so as to be freely movable in the radial direction of the disk {2}. (A) is a stepping motor for moving the head, and is made of α-wound steel pelt. # Carriage u! via an interlocking conversion mechanism (not shown).
J. In this embodiment, the stepping motor is a four-phase stepping motor having a first phase, a second phase, a third phase, and a fourth phase. Driven by one-phase excitation method. However, when the power is turned on, head Q7) (Iυ is connected to disk (2).
In order to ensure positioning on the track zero of
〜a↓Excite at least one of the four-phase coils. This can prevent the eye trochanter from stabilizing at a position corresponding to the third phase winding gland when the first phase winding wJ emerges.

A transistor c!:1 as a switching element and a motor control drive path Q are provided between the DC power supply terminal (self) of the device and the motor (IQ).Therefore, when the transistor (c) is on, The motor (1ω rotates only during the period).

The disc is equipped with a light-emitting element consisting of R, E, D, and a phototransistor for detecting an optical reflection index, that is, an index pasted on the surface of the rotor frame. (2) Detect the rotation angle position and rotation speed. Note that the drive pin (13) of the rotating body 01)
and light anti-01 finger {1! Since it has a certain angular positional relationship with (self), the drive pin insertion hole (2
You can know the position of (+). The light emitting element (support) is
In order to save power, it is connected after the switching transistor (self) and is driven by the motor (IG).

A waveform shaping circuit (G) following the light receiving element (T) of the rotation detector 4 sends out a pulse in accordance with the output of the index (T). The position of this pulse determines the position of the drive on the disk {2}! u
The position of the pin (h pin) ill hole (2(+)) can be known, and the 1111 rotation speed can be determined by the mutual interval of the stiffness pulses.

Ready board output M coupled to the output of the waveform m-type circuit CSIJ
Path CllH'. This is a circuit that detects the completion of type 1 of recording or reproduction.
△When the rotational speed of rotation reaches 90% or more of the steady one-rotation one-rotation rotation, a high-level ready plate output signal is output.

Electrolytic corrosion ★14 ゛tun ψλ on pole 1 old 1 connected to V4
When power is supplied to the power supply terminal V4, the voltage comparator detects that the source voltage is at a constant value (for example, 90% of the positive lit voltage), and detects the bulk level power situation [
It sends an on signal.

2 is a disk pII person detection 1 4-way, and based on a photocoupler consisting of a light emitting element (b) and a light receiving element (to) placed in the 410 person path of the cartridge +11, the cartridge +11 detects an eye turning body (l1 ) to detect whether the disc has been inserted or not, and generate a high-level disc insertion board exit signal.

In order to control the switching transistor 9 based on the output of the on-pole output circuit 64 and the disk insertion detection port C, a timer, an A N D gate CL power, and an edge trigger are used. Circuit (To), ort game 1-CI
i. IIS flip-flop Ml, OIL game} (41
3. Open collector type NAND gate (4 are provided. To explain this in more detail with reference to the younger brother 81 and FIG. 9, the timer (g) is the power-on detection 1r!
The 1st path is connected to C3, and the 1E source on detection signal is generated at button 8-1. for a certain period of time (approximately 12ms)
) generates a low level output as shown in FIG. 8 CB). The low level period of l, x t■ of this timer (1) is
The 1a magnetic type stepping motor (a) is switched to multi-phase U1 based on the power-on detection signal, and the operation is performed during a period in which the track zero alignment is reliably obtained. AND gate 0 sword is
evening. The output of the timer (1) and the output of the cooling-on board output circuit (2) are input, and the power-on detection signal is passed when the output of the timer C0 reaches a high level. Therefore, t in FIG.
AND goo at 2 points} Cl? ) output becomes high level. The edge trigger circuit M (self) inputs the output of the AND gate 07), and outputs a high level trigger signal in response to the output of the AND gate 0 rising to a high level at the time point 2. do. The OR gate 61 inputs the output of the edge trigger concave path (g) and the output of the disk insertion and swing circuit (c), and allows both signals to pass through. ■S flip-flop {4I reset terminal S is O It game} C
The reset terminal R is connected to the output of the ready detection circuit 01). Accordingly, t in Figure 8
At time 1, a high level output is sent from the Q output tin, as shown in FIG. will be reset. Further, as shown in FIG. 9, when the disk insertion detection signal is generated at the point [, in the power-on state, the flip-flop (4Q) is set on this front line.

One input terminal of OR gate 0υ is blip prop G
It is connected to the Q output terminal of IQ, and the other input terminal is connected to the motor-on signal supply circuit OJ.

The motor-on signal supply circuit inputs the motor (lFil) from an external device generally called a floppy disk controller.
A circuit that generates a command to turn on, for example, the circuit shown in FIG.
G)'s t4 to t, period, or starvation 9 {G's [, ~t.
A high level motor-on signal is generated between j and QJ.

O It game} (411 is a flip-flop (4 (》
The high-level output of the motor-on signal supply circuit (4:9 motor-on signal) is passed through, and this output is given to one input of the next-stage NAND gate (4:9).
D gate (The other input of the 4 forces is connected to the disk God University detection circuit (c), so the disk 1111 person detection {only when g is occurring, the previous stage 0 11 game} (
The high level output of 41) is passed through. NAND game 10
The output terminal of ○ is connected to the base of the transistor. NAND game} (421 is a high-level disk insertion detection signal generated from the disk insertion detection path ■), and other signals are generated only during the period when a high-level output is generated from the flip-flop GI1 or the motor-on signal supply circuit 01. Level 0 output is bad.

Therefore, the switching 1 transistor (own) is the 8th transistor.
As shown in Figure 9 and Figure 9, t, ~ (3, Tortoise, ~
t,, L, ~ [6, t, ~ to period σ), the motor (10 is driven,
And light-emitting Yuiko c! Powered by 81K.

Next, we can explain the dynamic r+= of this device. disk {2
1 is IF! 1 turn 1'N (1 When power is supplied to the source terminal V4 which is inserted above 11, the electric wire shown to the younger brother 8 prisoner; is set, the transistor (c) turns on, and the motor f11i1 is driven.
The first rolling body (II) also rotates, and the sliding pin (13l) and hole (2d
) is established. When the rotation speed of the disk (2} increases and a ready detection signal is generated at time t, the flip-flop (41) is reset, so the transistor (T) is turned off, and the rotation of the motor (1) is stopped. At the same time, the current of the light emitting element (self) is cut off.Therefore, the power consumption is reduced.If the rotating body (IJ) is rotated until the ready detection signal is generated, the disk (2) and Complete engagement with the rotating body (11) is obtained.

After that, when a motor-on signal is generated at point 1 in Figure 8, the transistor (self) turns on, and the motor (
+1jf)l! l! 1 rotation and the light emitting element (to) starts emitting light.

[, even if the motor (IG) rotates, the disk (2)
Since the engagement between the rotating body (11) and the rotating body (11) has been performed in advance for a period of t, to t, the engagement operation between the two is not substantially performed.
The disk (21) immediately starts rotating. Therefore, a recording or ready state (ready state) can be quickly obtained.

In this device, when the disk (2) is separated from the rotating body circle, the output of the disk Jfli person detection circuit (■) jumps to a low level, and the output of the NAND gate (4 gates Regardless, the level becomes high and the transistor 9 is turned off.As a result, the motor (IG
And the power supply circuit for the light emitting element (support) is cut off, thereby saving power.

As shown in FIG. 9, when the disk {2} is inserted tIII times at time L7 in the power-on state, a disk insertion detection signal is generated and the flip-flop Ol is set.

As a result, the transistor turns on and the motor (IG
The rotation of I and the light emitting element (self) start.

Then, a ready detection signal is generated [. The motor (1) rotates until time t. As a result, the disk (2) engages with the rotating body circle. At time t, the flip-flop (
When 40 is reset, the transistor turns off (
Then, the power supply to the motor (IG) and the light emitting element (c) is stopped, resulting in a power saving state. After that, when a motor on signal is generated at time L, the power supply to the motor (1 (j) and the light emitting element (c! The rotation starts. The rotation state of the rotating body (11) and the disk (2) has already been established in the period 17 to [,, so that recording and reproduction can be performed quickly. Then, if the ready board issue month occurs at the time of tlo, it will be k1 for the record playback 11th job status k1.

As is clear from the double series, the device of this embodiment has the following advantages.

Apart from the drive that is determined by the motor on signal, the disk rotation motor (field) is rotated by the source on detection signal and the disk matchmaker board output signal, so the disk (2) and the rotating body (1
1) can be established in advance,
Recording and playback can be started quickly.

(B) The motor continues to rotate due to the power-on detection signal and disk insertion detection signal.
Since it is shut off in synchronization with the generation of the ready detection signal, it is possible to suppress an increase in power consumption.

0 A motor (1
Since it is controlled in the same way as 01, the Joden effect is very strong.
Ru.

0 Since a timer (1) is provided and a flip-flop (410 sets of Mf) is generated by the power-on detection signal, there is a time difference between driving the stepping motor (a) when the power is on and driving the disk rotation motor (IG). Since it is possible to reduce the capacity of the power supply circuit connected to the power supply terminal (self), the stepping motor ■ is also driven by the power supplied from the power supply terminal. .

[Modified example]

The present invention is not limited to the above-mentioned embodiment, and the following modifications are possible, for example.

+11 Omit the line for inputting the output of the disk insertion board output circuit 9 to the output circuit 01, and use the flip-flop (
AI may be set only by the output of the edge trigger circuit (to).

(b) Motor-on signal t, ~t,, t, ~[. There is no problem even if it occurs during this period.

(C) Disk rotation detection domain C! j as a magnet and lIri
It may also be made of cypress in combination with an electric conversion element. In this case, the power supply to the magnetoelectric conversion circuit is configured to be turned on and off by a switch (self).

(dl Instead of using a photoelectric method to detect disc insertion, a micro switch or the like may be used for detection.

(e) Instead of resetting the flip-flop (4[I) with the output of the ready detection circuit 011, a reset signal may be generated independently based on the disk rotation detection, and the reset signal may be reset by this. In addition, a timer that starts counting with the flip-flop (IIl reset signal) is provided, and this timer is set for a certain period of time (for example, 4 2
) may generate a reset signal for flip-flop Gl(I).

(O) In this embodiment, a clamp member facing the disk rotating body (11) is not provided, but it is also applicable to an apparatus using a clamp member.

(g) Index on the a-ki disc (2)
It is also applicable to a device that has a hole and uses this index hole to detect rotational position and speed.

(11) If the capacity of the power supply is large or if it is not necessary to drive the stepping motor (to) when the power is turned on, give the J!j! extension of t, ”- t, in Figure 8.
Now, you can set the flip-flop (IIQ).

[Brief explanation of the drawing]

Figures 1 to 9 are for explaining the brain air disk device according to the embodiment of this publication. Figure 1 is a plan view of the magnetic disk cartridge, and Figure 8r42 is the car 1 of Figure 1.
- Figure 161 of the bottom of the IJ Tsuji, Figure 3 is a plan view of the cartridge shown in Figure 1 with the lid opened, Figure 4 is a front view of the cartridge shown in Figure 1, and Figure 5 is the rotating body of the disk device. Figure 6 is an enlarged cross-sectional view showing how the 191 rolling body and disk fit together, Figure 7 is a block diagram showing disk manufacturing, Figures 8 and 9 are Figure 7. ■～
((' This is a waveform diagram showing the state of point 8. (0... Cartridge, (2)... Magnetic disk,
(2b)...Hub, (2c) (2d)-...Hole, +
31-... Case, (+ 11-... Circular body, 07J.
... Spindle, (1'5... Drive pin, (between...
．． Visceral stone, (old... disk circulation motor, +17) 1
181... Magnetic God, (li... Carriage, (
To)... Stepping motor,... Power terminal, Q
:G...Switching transistor, (E)...Rotation detector, (Auto)...Light emitting element, C11)...Ready detection circuit, 04...7 Power ON detection III path ζ@
... Disk insertion detection signal 141 t... IL S flip flop, 0: motor on signal supply old 1 path.

Claims (1)

[Claims] (1) A device that records or reproduces data using a disk that is provided with a spindle insertion hole and a drive pin insertion hole, and a spindle that is inserted into the spindle insertion hole and a drive pin insertion hole that is inserted into the drive pin insertion hole. a rotating body having a drive pin that rotates the disk; a disk rotation motor coupled to the rotating body for rotating the disk; a recording or reproducing head; and a rotating body for moving the head in the radial direction of the disk. a feeding motor; a power terminal of the device; a switch provided between the power terminal and the disk rotation motor; and a power-on detection unit that detects that power supply has started via the power terminal. a delay signal forming circuit that forms a signal obtained by delaying the power-on detection signal obtained from the power-on detection circuit by a certain period of time; a rotation detector that detects the rotation of the disk; a ready state detection circuit that detects that the rotation speed of the disk has reached a substantially normal rotation speed based on the output of the rotation detector; and a motor for rotating the disk. a motor-on signal supply circuit that supplies a motor-on signal for commanding on-drive; and a motor-on signal supply circuit that controls the switch to be in an on-state during a period in which the motor-on signal is generated, and that outputs the predetermined time delay from the delay signal forming circuit. a switch control circuit that controls the switch to be turned on when a signal indicating that the rotation speed has been reached is obtained, and controls the switch to be turned off when an output indicating that the rotation speed has reached the substantially normal rotation speed is obtained from the ready state detection circuit; equipped disk device.