JPH03162770A - Disk device - Google Patents

Abstract

PURPOSE:To quickly write and read information by continuing the turning-on control of a driving switch for the time required to insert a driving pin to a driving pin insertion hole at the time of using a disk provided with a spindle insertion hole and the driving pin insertion hole. CONSTITUTION:The disk 2 of a disk cartridge 1 is constituted of a magnetic sheet 2a and a hub 2b which is loaded on the center of the sheet 2a and is made of a magnetic metallic disk. The disk 2 is provided with an opening 10 for rotation driving only on a rear face 5 of a case 3, and the hub 2b is exposed from the opening and is provided with a spindle insertion hole 2c and a driving pin insertion hole 2d. When a power-on detection signal is generated, a switch is turned on in response to this signal and the disk is rotated. Consequently, the disk 2 can be engaged with a spindle 12 and a driving pin 13 at the time of power-on. Thus, information is quickly recorded and reproduced.

Description

[Detailed description of the invention]

[Technical Field] The present invention relates to a disk device for recording or reproducing data using a disk having a spindle insertion hole and a drive pin insertion hole, such as a microfloppy disk.

[Prior art]

Recently, a device for driving a flexible magnetic disk by providing a drive pin in addition to a center spindle has been invented. 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. a rotating body including a spindle inserted into the hole and a drive pin inserted into the drive pin insertion hole; a motor driving the rotating body to rotate the disk;
A recording or reproducing head, a power terminal of the device, and a switch provided between the power terminal and the motor;
a power-on detection circuit that detects that power supply is started via the power supply terminal; a disk insertion detection circuit that detects that the disk is inserted onto the rotating body; and a power-on detection circuit that detects that the disk is inserted onto the rotating body. When the power-on detection signal is obtained from the power-on detection circuit in a state where the disk is inserted onto the rotating body before the power-on detection signal is obtained, the motor is turned on. The switch is turned on, and the switch is kept on for at least the time required to insert the drive pin into the drive pin insertion hole, and a power-on detection signal is obtained from the power-on detection circuit. In this state, when a disk insertion detection signal is obtained from the disk insertion detection circuit, the switch is turned on so as to turn on the motor, and at least the drive pin is inserted into the drive pin insertion hole. The time is related to a disk device equipped with a switch control circuit that continues on-control of the switch. [Actions and Effects of the Invention] The present invention has the following effects. (b) When a power-on detection signal is generated while a disk is inserted, the switch turns on in response and the disk rotates. Therefore, it is possible to establish engagement between the disk, the spindle, and the drive pin when the power is turned on, and subsequent recording or reproduction can be started quickly. (b) When a disc is inserted while the power source is on,
The disc rotates. Therefore, it is possible to establish engagement between the disk, the spindle, and the drive pin when the disk is inserted, and subsequent recording or reproduction can be started quickly. [Embodiment] Next, a magnetic disk device according to an embodiment of the present invention and a magnetic disk cartridge used in this device will be described with reference to FIGS. 1 to 9. 1 to 4 show a disk cartridge (1). This cartridge (1) 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 (
3). Case (3
) are provided with head insertion openings ((3) and (7) on both the front surface (4) and the back surface {5), and when not in use, these openings (
0) (7) is closed by a sliding shirt top {8}. 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 (8) can be opened by opening the recess (9) of the case (3).
) and place a release member (not shown) on the shirt.
8} by pressing the sides. The disc (2) of the disc cartridge (IT) of this embodiment consists of an air shaft (2a) and a hub (2b) made of a cerebral metal disc mounted in the center thereof. Since the disk {2} is not rotated by pressing it with a clamper, an opening (II) for rotational drive is provided only on the back side (53) of the case (3), and the hub (2b) is pulled out from there. This hub (2b) is provided with a spindle insertion hole (2c) and a drive pin insertion hole (2d). Fig. 5 shows the case when recording or reproducing using the disk cartridge +11. A rotating body (
11), and FIG. 6 is an enlarged sectional view showing the state in which the disk {2) is engaged with the one-turning body α0. (b) The rolling body (Il1 has a spindle (13) and a drive pin 0 in the center, and also has a metal hole in the center of the disk (2).
It has a permanent headstone 04 for adsorbing the liquid (2b). In addition, in order to easily achieve engagement between the drive pin (13) and the hole (2d), the drive pin O''5 is supported by a plate panel (former panel) and is freely displaceable in its axial direction. When the disk (2) is engaged with the case (3), the disk {2} is rotated with the rotating body Q.
Insert above l1. At this time, of course, the spindle insertion hole (2C) of the disk (2) is connected to the rotating body (spindle 0 as marked).
Position it to match the evening. As a result, the spindle α4 is engaged with the hole (2C). but,
The drive pin Q31 and the hole (2d) do not necessarily match,
In case of mismatch, connect the drive pin (no. 2b above 13).
rides on the drive pin 03, and the drive pin 03 is pushed down against the spring (13).After that, when the rotating body (Ill) is rotated, the positional relationship between the drive pin (131 and the hole (2d) changes, and finally the drive pin ( The position of +3 and the hole (2d) match, and the spring (
19 upward deflection, the force causes the drive pin (eye hole (2
d), and there is complete engagement between the rotating body 01) and the disk (2). In this way, a certain amount of time is required to engage the disk (2) and the rotation body circle,
When a motor-on signal is generated to rotate the rotating body QO prior to recording and reproduction, the start of recording and reproduction is delayed by the time necessary for engagement. Moreover, even if the disk (2) is once engaged with the rotating body CIl1, the engagement relationship between the disk (2) and the quadruple rotating body Ql+ may become incomplete due to vibrations etc. when the power is turned off or during the power off period. There is a risk. FIG. 7 shows a magnetic disk device that solves the above-mentioned problems. A rotating body (for rotating the disk (2) in the case (31) of the cartridge Il+ loaded in a predetermined position)
11) is constructed as shown in FIGS. 5 and 6, and is directly connected to the outer rotor type motor (IG) for disk conversion. (171 (18) is a magnetic head, which is attached to the carriage a1 and drives the disk (2) is guided so as to be movable in the radial direction.The head is moved by a stepping motor for moving the head, and the carriage ( l
i. In this embodiment, the stepping motor is a 4-phase stepping motor with 1 phase winding), 2 phase winding (1 phase), 1 phase winding (1 phase), 3 phase winding (3 phase winding), and 4 windings (4 phases). Driven by Qυ using a single phase excitation method. However, when turning on the Asahigen head (Jn (li) to disk (
In order to reliably position the device at track zero in step 2), the first phase capacitor is energized in response to the power-on detection, and at least one of the remaining second to fourth phase capacitors is energized. This can prevent the rotor from stabilizing at a position corresponding to the three-phase winding during excitation of the three-phase winding. Between the DC power supply terminal of the device and the motor (IG), a transistor (1) as a switch element and a motor control drive circuit c! (IG+ rotates.) Equipped with a light-emitting element (self) consisting of an LED and a light-receiving system element (self) consisting of a phototransistor for detecting a light opposite index, that is, a finger ea@, pasted on the surface of the rotor blade. Then, the rotational angular position and rotational speed of the disk (210) are detected. Since the drive pin 0 of the rotating body αυ and the light reflection index surface have a certain angular positional relationship, the finger 41!@
Based on the detection, the position of the drive pin insertion hole (2d) can be known. The light emitting element (1) is connected after the switching transistor (15) in order to save power, and is driven in synchronization with the motor (15). Orthopedic mouth route four is an indicator (self)
A pulse is sent out according to the pumping. The position of the drive pin insertion hole (2d) on the disk (2) can be determined from the position of this pulse, and the rotation speed can be determined from the mutual interval between these pulses. The ready output circuit (OD) connected to the output of the waveform shaping circuit (7) is a circuit that detects when the preparation for recording or playback is completed. And outputs a high-level ready detection signal when the rotational speed of the motor (IG) reaches 90% or more of the steady rotational speed. 0 desire is
When power is supplied to the power supply terminal, a voltage comparator detects that the power supply voltage has reached a certain value (for example, 90% of the normal voltage), and sends out a high-level power-on signal. (to) is the disk insertion detection path 1, and the cartridge 11+ is detected by the photocoupler consisting of a light emitting element (material) and a light receiving element (to) placed in the input path of the cartridge (1). It detects whether the disc is inserted onto the rolling body 01) and generates a high-level disc insertion detection signal. Denei on detection lgI approx. 07J and disk insertion detection circuit (
The switching transistor output is set based on the output of BL {al, timer, AND}
07), Edge trigger eye connection, 0 ■ Gut 6Il%■
There are four S flip flops, an O It gate (40), and an open collector NAND gate (44).To explain these in more detail with reference to the 2JS B garden and Figure 9, the timer hit is the power-on detection circuit. C32+
8C for a certain period of time (approximately 12ms) in response to the power-on detection signal generated at time t of the younger brother 811.
A low level output is generated as shown in B). This timer (
The low level period from t to t in 1) corresponds to the period in which the stepping motor (a) of the l-phase excitation method is multiphase excited based on the power-on detection signal to ensure that the track zero position is obtained. There is. AND Gut 6η is in the evening. The output of the timer (to) and the output of the power-on detection time NO are input, and the power-on detection signal is passed when the output of the timer (to) reaches a high level. Therefore, at time 12 in FIG. 8, the output of the AND gate (9) becomes high level. The edge trigger circuit (self) inputs the output of the AND gate (9), and in response to the output of the AND gate (0'r) rising to a high level at time 1t, generates a high-level trigger signal as shown in FIG. Output. 0) The gate OI receives the output of the edge trigger path (to) and the output of the disk input/output circuit (c) as inputs, and allows both signals to pass through. The set terminal S of the 7-port RS flip OQ is connected to the output of the OR gate, and the reset terminal S is connected to the output of the ready output circuit 01). Therefore, at the point [, in FIG. 8], a high level output is sent from the Q output terminal as shown in FIG. It is reset in response to the ready detection signal at the time. Also, as shown in FIG.
, when the disc insertion detection signal is generated, the leading edge of the flip-flop (40) is set. One input terminal of the OR gate Glυ is connected to the Q output terminal of the flip-flop (IIO), and the other input terminal is It is followed by a signal supply circuit 03. The motor-on signal supply circuit is a circuit that generates a command to turn on the motor 0G from an external device generally called a floppy disk controller.
G) ノ'4 ~fa period, +'! ．． ? J',
9 Figure + (:) tl) A high level motor-on signal is generated during the period l, ~ l,. 01tl' One (41) is a flip-flop (4I
Both the high-level output of the motor-on signal supply route (4'5) and the motor-on signal of
Since the other input of the D gate 04 is connected to the disk extension detection circuit, only the 11.1F where the Disk II 7 ejection signal is generated is connected to the previous stage 011 game} (4
Pass the high level output of 1). NAND gate (4
The evening output terminal is +itpyc based on transistor 00.
has been done. The NAND gate (421 indicates that a high-level output is generated from the flip-flop (4G or motor-on signal supply circuit 0) during a period when a high-level disk extension detection signal is generated from the disk extension detection path (to). It is in the low level υ output state only during the period.Therefore, the switching transistor (to)
As shown in the figure and 0 in FIG. 9, t, ~'Ss'4~t6
, t, ~'4x'l~to It is turned on only during the period k', and only during this period the motor (IG) is driven and power is supplied to the light emitting element (to). Next, the operation of this device will be described. .With the disk (2) inserted onto the rotating body (II1), connect the power terminal n.
When K power is supplied, the flip-flop (llQ is set,
The transistor is turned on and the motor IG is driven. As a result, the rotating body (111) also rotates, and the drive pin (13
The engagement between the hole (2d) and the hole (2d) is established. When the rotation speed of the die (2) increases and a ready detection signal is generated at the Ls point, the flip-flop (40) is reset, so the transistor (self) is turned off, and the rotation of the motor 0G is stopped. In addition, the current of the light emitting element (self) is cut off.Therefore, power consumption is reduced.If the rotating body (IJ) is rotated until the ready detection signal is generated, the disk (2
) and the rotating body Ql3 can be completely integrated. After that, when a motor-on signal is generated at point [, in Figure 8, the transistor (to) is turned on again, and the motor (IG) starts rotating and the light emitting element (to) starts emitting light. At time t4, motor α0 Even if the disc (2) rotates, the engagement between the disc (2) and the rotating body (10 has already been carried out in the period [, ~ [,, ) starts rotating immediately.Therefore, a recording or ready state can be quickly obtained.In this device, when the disc (2) is separated from the rotating body, the disc insertion detection circuit (H) starts rotating. ) becomes a low level, and the output of the NAND gate (4 forces becomes a high level regardless of the presence or absence of the motor oscillator signal, turning off the transistor (c). As a result, the motor (IQ and light emitting element ( As shown in Fig. 9, when the disk (2) is inserted at time t in the power-on state, a disk insertion detection signal is generated and the flip-flop GIG is set. As a result, the transistor is turned on, and the motor (IGI) starts rotating and the light emitting element (2) starts emitting light.Then, the motor (IGI) rotates until time t. when the ready detection signal is generated. As a result, the disk {21 and the rotating body Qll are engaged with each other. When the flip-flop OQ is reset at time 1a, the transistor (c) is turned off, and power is supplied to the motor (IG and light emitting element (c)). stops and enters the power saving state.After that, when the motor I signal is generated at time t, power supply to the motor (IQ and light emitting element (c) starts.The rotating body (11) and the disk ( 2
) has already been established during the period t, to t, so that a disk rotation state can be obtained that allows rapid recording and reproduction. If a ready detection signal is generated at the time too, the recording/reproducing state is enabled. As is clear from the above, the apparatus of this embodiment has the following advantages. ■ Apart from driving based on the motor-on signal, the power source-on detection signal and the disk trj person detection signal are used to connect the disk rotation motor (1 (because it rotates the disk 12) and the rotating body (1) can be established in advance, and recording and playback can be started quickly. Since it is shut off in synchronization with the generation of the detection signal, it is possible to suppress an increase in power consumption. 0 The motor that supplies power to the light emitting element (self) (because it controls 1h1' as well as IG)2l]?! !The effect is great. 0 A timer (7) is provided, and the setting of the flip-flop (4 (J) is delayed by the power-on detection signal, so
It is possible to give a time difference between the drive of the stepping motor (A) when the Asahi source is turned on and the drive of the disk/rotation motor (1). Note that the stepping motor ■ is also driven by the power supplied from the power supply terminal. [Modification] The present invention is not limited to the above-mentioned embodiment, and for example, the following A modification example is possible. (al The output of the disk insertion detection circuit (self)
The line input to the t-gate Oi may be omitted, and the flip-flop 41G may be set only by the output of the edge trigger circuit. (b) There is no problem even if the motor-on signal is generated during the period t, ~t3, t1~[. (c) The disk rotation detector (g) may be configured by a combination of a magnet and a magnetoelectric conversion element. In this case, the power supply to the magnetoelectric conversion circuit is configured to be turned on and off using a switch. (d) Instead of using the photoelectric method to detect disk insertion, it may be possible to use a microswitch or the like to detect the insertion L1. (e) Ready detection circuit C3 for flip-flop 00
Instead of resetting with the output of 11, a reset signal may be formed independently based on the disk rotation detection, and the reset may be performed using this. It is also possible to provide a timer that starts counting with the set signal of flip-flop 4, and to generate a reset signal for flip-flop 4 when this timer reaches a certain period of time (for example, 420 ms). (f) Although this embodiment does not include a clamp member facing the disk rotating body 01), it is also applicable to an apparatus using a clamp member. (g) It is also applicable to a device that has an index hole on the disc (2) and uses this index hole to detect the rotational position and speed. (If the capacity of the hl '121 source is large or if it is not necessary to drive the stepping motor (to) when the power is turned on, do not apply the delay of 1 to [2 in Fig. 8).
Flip flop (you can set it to 40).

[Brief explanation of the drawing]

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. , FIG. 3 is a plan view showing the cartridge shown in FIG. 1 with the lid opened, FIG. 4 is a front view of the cartridge shown in FIG. The figure is an enlarged sectional view showing the state of engagement between the rotating body and the disk, FIG. 7 is a block diagram showing the disk device, and FIGS. Fig. 11》 Cartridge, (2) Magnetic disk, (2b) Hub, (2c) (2d) Hole,
(3)...Case, (1υ...Rotating body, a3...
Spindle, (+3... drive pin, (14l...
Magnet, (IQ... disk rotation motor, Q7) tl
81...Magnetic head, +li...carriage, (a)...stepping motor,...Km terminal, (to)...switching transistor, (e)...rotation detector, (auto)...light emitting element, 0υ...ready detection circuit, c33...power on detection circuit (c)...
Disc insertion detection circuit, grip...RS7 lip-flop, (A3...motor-on signal supply circuit.

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 motor that drives the rotating body to rotate the disk; a recording or reproducing head; a power terminal of the device; and between the power terminal and the motor. a switch provided on the rotating body; a power-on detection circuit that detects that power supply is started via the power supply terminal; and a disk insertion detection circuit that detects that the disk is inserted onto the rotating body. , in a state in which the disk is inserted onto the rotating body before the power-on detection signal is obtained from the power-on detection circuit, when the power-on detection signal is obtained from the power-on detection circuit, the motor is The on-control of the switch is continued at least for the time required to insert the drive pin into the drive pin insertion hole, and the power is turned on from the power-on detection circuit. When a disk insertion detection signal is obtained from the disk insertion detection circuit in a state where a detection signal is obtained, the switch is turned on so as to turn on the motor, and at least the drive pin is inserted into the drive pin insertion hole. and a switch control circuit that continues on-control of the switch for the time required to insert the switch.