JP2000149399A - Disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk device on which a disk is hard to be vibrated by the vibration of a base. SOLUTION: This device is provided with a disk chuck device for holding a disk 1023 on a rotary turntable 1028, a spindle 1002 for rotary-supporting the turntable 1028, and a leaf spring 1120 for energizing the spindle 1002 with a predetermined energizing force in the axial direction. It is preferable to set this energizing force to 60 to 100 g.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus (disk apparatus) using a disk-shaped recording medium such as an audio and video disk, and more particularly to a disk chuck apparatus for fixing a disk to the apparatus. .

[0002]

2. Description of the Related Art FIG.
No. 60 is a longitudinal sectional view showing a conventional disk chuck device, and FIG. 12 is a longitudinal sectional view showing a state where a disk is mounted on the conventional disk chuck device. In the figure, reference numeral 1021 denotes a base of the apparatus;
Reference numeral 022 denotes a support shaft fixed to the base 1021, 1023 denotes a recording medium for signals such as video and audio, and a disk having a clamping plate 1042 formed of a soft magnetic material at the center, and 1031 to a disk 1023. The received cartridge 1024 is a receiving portion for positioning the disk 1023 in the height direction. Reference numeral 1025 is a centering portion which is a positioning member for the disk 1023 in the radial direction.
6 is an introduction portion having an inclined portion for guiding to the centering portion 1025 when the disc 1023 is mounted on the device;
Reference numeral 1027 denotes a chuck magnet having a single magnetic domain structure shown in FIG. 13 or a stripe magnetic domain structure shown in FIG.
26, a turntable 1029 comprising a chuck magnet 1027, and a turntable 1028
A bearing 1030 for rotationally supporting the motor 1030 is a motor for driving the turntable 1028 to rotate.

The motor 1030 is fixed to a base 1021 and has an iron core 1062 around which a coil (not shown) is wound.
And the rotor 10 rotating together with the turntable 1028
63 and a magnet 1064 fixed to the rotor 1063.

FIG. 15 is a conceptual view of a mechanism showing an example of a disk loading / unloading device of a recording / reproducing device using a disk chuck device. In the figure, 1032 denotes a cartridge 1031
1033 is a fulcrum which is the center of rotation of the holder 1032, 1034 is a spring for urging the holder 1032 to rotate clockwise in the drawing, 1035 is an engaging portion provided on the holder 1032, 1036 is a hook, 1037 Is a fulcrum which is the center of rotation of the hook 1036, and 1038 is a hook 10
A spring for urging the rotation of the cartridge 10 in the counterclockwise direction in the figure; 1039, a positioning pin as a positioning member for the cartridge 1031; 1040, an urging member for pressing and holding the cartridge 1031 provided on the holder 1032 to the recording / reproducing apparatus; Reference numeral 1041 denotes the same spring, and 1043 denotes a disk loading device composed of the above components.

Next, the operation will be described. Disk 10
23 is loaded into the recording / reproducing device by the disk loading device 1043. In FIG. 15, when the cartridge 1031 is inserted into the holder 1032 and the holder 1032 is pushed downward, the hook 1010 is inserted into the engaging portion 1035 of the holder 1032.
36 engages and holder 1032 is fixed to the device. Further, the cartridge 1031 is pressed and held by the positioning member 1039 of the base 1021 by the urging member 1040. At this time, the disk 1023 is
8, the centering unit 1
025 and the receiving portion 1024, the position thereof is determined, and separated from the disk receiving portion in the cartridge 1031, and the clamping plate 1042 is fixed by the chuck magnet 1027.
And is fixed to the turntable 1028. After that, the turntable 1028
The signal is driven to rotate by 0, and signals are recorded and reproduced by a magnetic head or an optical head.

[0006]

However, FIG.
In the conventional disk chuck device shown in FIG. 15, the chuck magnet 10 fixed to the turntable 1028 is used.
The disk 1023 is sucked by 27. Therefore, when removing the disk 1023 from the turntable 1028, the hook 1036 is rotated clockwise in FIG. 15 manually or by an actuator such as a motor to release the engaging portion 1035. Then, the holder 1032 is flipped up by the spring 1034. At this time, it is necessary for the holder 1032 to lift the disk 1023 against the attraction force of the chuck magnet 1027. For this purpose, the spring force of the spring 1034 needs to be equal to or more than the sum of the attraction force of the chuck magnet 1027 and the weight of the cartridge 1031 and the holder 1032. Therefore, when the attraction force of the chuck magnet 1027 is increased,
The force required to mount the holder 1032 on the device is increased, and there is a problem that the operational feeling is deteriorated. Also,
If the attraction force of the chuck magnet 1027 is too small, the holding force of the disk 1023 on the turntable 1028 decreases, and when a disturbance such as vibration acts on the device, the disk 1
023 is easily separated from the turntable 1028, which makes it difficult to read an accurate signal.

In the conventional disk chuck device,
Since the turntable 1028 is supported by the support shaft 1022 fixed to the base 1021, when a disturbance such as a vibration is applied to the device, the vibration is transmitted to the turntable 1028, and the disk 1023 is vibrated. There is a problem that it becomes difficult to read a proper signal.

In the conventional disk chuck device,
Motor 10 for rotating turntable 1028
Since two magnets, a magnet 1064 used for the disk 30 and a chuck magnet for attracting the disk 1023, are required, there is a problem that the number of parts increases and the cost increases.

In the conventional disk chuck device,
Since two holding members, a rotor 1063 for holding the magnet 1064 of the motor 1030 and a turntable 1028 for holding the chuck magnet 1027, are required, there is a problem that the number of parts increases and the cost increases. .

Further, the conventional disk chuck apparatus has a problem that a large force is required to remove the clamping plate 1042 attracted by the chuck magnet 1027 from the apparatus.

An object of the present invention is to provide a disk device in which a disk is hardly vibrated by vibration of a base.

Another object of the present invention is to provide an inexpensive disk drive with a small number of components.

[0013]

According to a first aspect of the present invention, there is provided a disk device in which a support shaft for rotatably supporting a turntable is axially urged by an elastic body.

The disk device according to a third aspect of the present invention is one wherein a vibration isolating member is provided on a support shaft which rotatably supports the turntable.

According to a fifth aspect of the present invention, in the disk device, a part of the turntable is magnetized, and an exciting coil is arranged to face the turntable, and the turntable floats by energizing the exciting coil. It was made possible.

Further, in the disk device according to the present invention, the magnet and the iron core of the circumferentially opposed type turntable driving motor which shares the support shaft of the turntable are arranged with their center height shifted vertically in the height direction. And a part of the turntable is magnetized, and an exciting coil is disposed on the turntable so as to oppose the repulsive force of the turntable and the exciting coil by energizing the exciting coil, and a force between the iron core and the magnet. The height of the turntable is determined by the balance with the suction force.

In the disk device according to the present invention, a part of the turntable is magnetized, an exciting coil is opposed to the magnetized turntable, and the turntable is driven up and down and a cartridge is conveyed. A system control circuit for controlling the drive of the cartridge, and controls the energization of the exciting coil in conjunction with the operation of the cartridge transport mechanism.

According to a tenth aspect of the present invention, there is provided a disk drive according to the first aspect, wherein a part of the turntable is magnetized, an exciting coil is opposed to the turntable, and a drive circuit for driving a focus actuator and a focus of the optical lens. The energization of the exciting coil is controlled in conjunction with a detector for detecting the displacement, and the turntable is driven up and down.

In the disk apparatus according to the twelfth aspect of the present invention, a plurality of suspension means each comprising a combination of a suspension magnet and a suspension coil are attached at different angles, and each suspension means is provided in accordance with the attitude of the apparatus. This is to change the voltage applied to the coil.

[0020]

According to the disk device of the first aspect, the vibration of the base is damped by the elastic body, and the vertical movement of the turntable is suppressed.

Further, in the disk device according to the third aspect, the vibration-proof rubber and the compression spring attenuate the vibration of the base and suppress the vibration of the turntable.

In the disk device of the fifth aspect, the height of the turntable is determined by balancing the weight of the disk and the turntable with the magnetic field of the exciting coil.

Further, in the disk device according to the present invention, the turntable is positioned in the height direction by balancing the attractive force of the iron core and the magnet and the repulsive force of the exciting coil and the magnetized turntable.

In the disk device of the eighth aspect, when the cartridge is transported in the horizontal direction and the disk is mounted on the turntable, the upper surface of the turntable moves below the bottom surface of the cartridge.

In the disk device of the tenth aspect, when the focus of the optical lens exceeds the movable range of the focus actuator, the turntable is moved up and down by the control circuit to change the disk height.

In the disk device according to the twelfth aspect, when the disk surface is installed horizontally or vertically with respect to the ground, or when the disk surface is installed at an angle other than the above, the angle is determined according to the angle. A voltage against the gravity is generated by the voltage of the suspension coil.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments.

Embodiment 1 FIG. 1 is a longitudinal sectional view showing a disk device according to Embodiment 1, and the same or corresponding parts as those of the conventional device described with reference to FIGS. Is omitted.

In the drawing, reference numeral 1020 denotes a plate spring fixed to the base and formed of an elastic body; 1211, a pulley press-fitted and fixed to the support shaft 1002; 1122, a motor fixed to the base 1021; The press-fitted and fixed pulley, 1124 is a pulley 1121 and a pulley 1123
Is a holder that press-fits and fixes the bearing 1029 and supports the support shaft 1002.

The operation will be described below. In FIG. 1, a biasing force is applied to a leaf spring 1020 in a direction in which one end pushes up a support shaft upward. With this biasing force, the end surface 1126 of the pulley 1121 abuts on the inner ring of the bearing 1029, and the normal height of the turntable 1028 is positioned. Next, when rotating the disk 1023, the rotation force of the motor 1122 is supplied to the pulley 1123.
Then, the turntable 1028 which is transmitted to the pulley 1121 via the belt 1124 and attracts the disk 1023 by the chuck magnet 1109 rotates. When vibration is applied to the base 1021 in the vertical direction in this state, the motor 1122 and the holder completely fixed to the base 1021 are vibrated to have substantially the same phase and the same amplitude.
The vibration of the support shaft 1002 is attenuated by a leaf spring, which is an elastic body, and the amplitude is suppressed.

It has been found that the above urging force is desirably set at about 60 g to 100 g when the weight of the disk 1023 is 5 g and the total weight of the turntable 1028 and the magnet 1109 is 1.3 g.

FIG. 2 shows the disk 102 when the base 1021 is vibrated with the urging force of the leaf spring 1020 set to 80 g.
FIG. 3 shows measurement data of the amplitude of the vertical movement of the disk 1023 when the base 1021 is vibrated with the urging force of the leaf spring 1020 set to 130 g. . 2 and FIG. 3 that the resonance of the disk 1023 is suppressed as shown in FIG. 2 even if the natural frequency (180 to 200 Hz) when the disk 1023 and the turntable 1028 are fixed to the vibration source is included. I understand.

Embodiment 2 FIG. 4 is a longitudinal sectional view showing a disk device according to Embodiment 2. FIG. 5 is a schematic view showing the arrangement of the vibration isolating rubber on the chassis, and FIG. 4 is a cross-sectional view taken along a chain line S67-S67 in FIG. In the figure, a pair of pins 1135 are implanted on a base 1021, and a pair of substantially cylindrical vibration-proof rubbers 1136 are fitted to the pins 1135. Anti-vibration rubber 11
A compression spring 1137 is provided inside 37. A thrust receiver 1138 is provided at the lower end of the support shaft 1002, and a substantially cylindrical anti-vibration rubber 11 is provided on the lower surface of the thrust receiver.
One end of 39 is in contact. A compression spring 1140 is provided on the outer periphery of the vibration isolation rubber 1139. Anti-vibration rubber 113
The other ends of 6 and 1139 are fixed to chassis 1141.

As shown in FIG. 5, the chassis 1141 has a substantially rectangular shape when viewed from above.
6, 1136 are located at the vertices of the triangle as shown,
The base 1021 is supported at three points.

The operation will be described below. Compression spring 1
137 and compression spring 1140 are in proportion to the total weight of the components attached to base 1021. Anti-vibration rubber 11
36 and the vibration isolating rubber 1139 absorb the vibration transmitted from the chassis 1141 to the base 1021. Compression spring 11
40 is the weight of the turntable 1028 and the lower magnet 1
The turntable 1028 is pushed upward through the thrust receiver 1138 against the suction force of 134. At this time, the anti-vibration rubber 1139 is disposed directly below the support shaft 1002, so that when a disturbance is applied to the base 1021,
The vertical movement of the turntable 1028 is attenuated by the connection between the vibration isolating rubber 1139 and the support shaft 1002.

Third Embodiment FIG. 6 is a longitudinal sectional view showing a disk device according to a third embodiment. In the figure, reference numeral 1142 denotes an excitation coil fixed to the base 1021 and disposed on the base 1121 so as to face the turntable 1028 in which the upper portion is magnetized to the N pole and the lower portion is magnetized to the S pole. Turntable 10
28 is a pulley portion that suspends the belt 1124 together with the pulley 1123 fixed to the motor 1122.

The operation will be described below. Base 10 made of magnetized turntable 1028 and magnetic material
Between the turntable 1028 and the base 102.
A force for pulling in the direction 1 is generated. In addition, downward gravity acts on the turntable 1028. In order to oppose these, the excitation coil 1142 is energized to generate a magnetic field in a direction repelling the magnetic pole S below the turntable 1028 at a position where the turntable 1028 and the excitation coil 1142 face each other. Then, the height of the turntable 1028 is determined by the height at which the suction force acting on the turntable 1028 downward and the gravity acting on the turntable and the repulsive force of the exciting coil 1142 are balanced. Further, since the component for positioning the height with respect to the turntable 1028 or the support shaft 1002 does not abut in the vertical direction, the vibration of the base 1021 makes it difficult for the turntable 1028 to be vibrated in the vertical direction.

Fourth Embodiment FIG. 7 is a longitudinal sectional view showing a disk drive according to a fourth embodiment.
In the figure, the turntable 1028 has an N pole at the top,
The lower part is magnetized to the S pole. The yoke 1144 includes an annular portion 11 fixed to the lower surface of the turntable 1028.
04 and a cylindrical portion 1105 extending downward from the outer periphery of the annular portion. A magnet 1145 having an arbitrary number of poles is fixed to an inner surface near the lower end of the cylindrical portion 1105. The core 1146 includes a cylindrical portion 1102 fixed to the holder 1125 and a plurality of salient pole portions 1147 extending radially outward from the cylindrical portion.
Having. A coil 1148 is wound around the salient pole 1147. An exciting coil is wound around the cylindrical portion 1102. Yoke 1144, magnet 114
5, a core 1146, and a coil 1148 constitute a circumferentially opposed motor 1130.
The turntable 1028 is driven.

The operation will be described below. Magnet 114
5 and the salient pole portion 1147 are arranged offset from each other in the height direction, so that an upward force acts on the turntable 1028 due to the attractive force acting on the magnet 1145 and the salient pole portion 1147. On the other hand, the excitation coil 1149 is energized to generate a magnetic field for attracting the S magnetic pole below the tar table.
Then, the attractive force of the magnet 1145 and the salient pole portion 1147 and the attractive force of the turntable 1028 and the exciting coil 1149 balance, and the height of the turntable 1028 is positioned. (The turntable 1028 is in a floating state in this state.)
028 or the component for positioning the height with respect to the support shaft 1002 does not abut in the vertical direction.
The vibration of the turntable 1028 makes it difficult for the turntable 1028 to be vibrated in the vertical direction.

Fifth Embodiment FIG. 8 shows a disk device according to a fifth embodiment. The disk device of this embodiment includes the same disk chuck device as that of the third embodiment, and further includes a coil excitation circuit 1151 connected to an excitation coil 1142 of the disk chuck device.
, A system controller 1152 connected to the coil excitation circuit 1151, and a cartridge transport mechanism 1153 on which the cartridge 1031 is mounted and whose operation is controlled by the system controller 1152.

The operation will be described below. When mounting the cartridge 1031 on the disc chuck device,
The cartridge transport mechanism 1153 is operated by a signal from the system controller 1152. Then, the cartridge 1031 moves horizontally in the direction of the turntable 1028. At this time, the bottom of the cartridge 1031
Although it is set at a position lower than the upper surface of the turntable 1028 in order to suppress the height of the apparatus, the system controller 1152 commands the operation of the cartridge transport mechanism 1153, and at the same time, the coil excitation circuit 1151 is described in the third embodiment. A signal is supplied to the exciting coil 1142 that has a polarity opposite to that of the energized coil 1142, that is, a signal that energizes the turntable 1028 in a direction of pulling it downward. Then, the upper surface of the turntable 1028 falls below the bottom surface of the cartridge 1031 during the transportation of the cartridge 5, so that the turntable 1028 and the cartridge 1031 do not collide.

When the transfer operation is completed, the system controller 1152 detects a signal indicating that the operation of the cartridge transfer mechanism 1153 has reached the final stage, and the coil excitation circuit 1
151 is supplied with a signal of the same polarity as that of the exciting coil 1147 described in the third embodiment, that is, a signal for energizing the turntable 1028 in a direction of lifting the turntable 1028 upward. Then, the magnetized turntable 1028 attracts the clamping plate 1042. Then, the disk 1023 is positioned at a predetermined height, and the disk 1023 enters a reproducible state.

Sixth Embodiment FIG. 9 shows a disk drive according to a sixth embodiment. The disk device of this embodiment includes a disk chuck device similar to that of the fourth embodiment, and further has an optical pickup 1154 for reproducing or recording information on the disk 1023.
A focus actuator 1155 incorporated in the optical pickup 1154; and an actuator drive circuit 1156 for driving the focus actuator 1155.
A focus control circuit 1157 for controlling the focus of the optical pickup 1154, and a turntable driving circuit 1 connected to the control circuit 1157 and the exciting coil 1142.
158, an optical lens 1159 attached to a focus actuator 1154, and an optical pickup 115
4 provided with a detector 1160.

The operation will be described below. When the magnetized turntable 1028 is rotated, the disk 102 fixed on the turntable 1028 by the attraction of the clamping plate 1042 and the turntable 1028
3 rotates with the turntable 1028. At this time, the optical pickup 1154 reads the signal recorded on the disk 1023, but the height of the disk 1023 fluctuates due to the swing of the turntable 1028 or the undulation of the disk 1023. The detector 1160 outputs a positive voltage when the distance between the signal recording surface 1161 and the optical lens 1159 is longer than the focal length, and outputs a negative voltage when the distance is too close to the focal length, at a level corresponding to the error distance. The potential is output to the control circuit 1157. Therefore, the driving circuit 1 is obtained from the information of the detector 1160 which detects a change in the distance between the optical lens 1159 and the signal recording surface 1161.
The focus actuator 1155 is driven by 156, and the distance between the optical lens 1159 and the signal recording surface 1162 is kept constant by the control circuit 1157.

However, due to variations in the manufacture of the disk or errors in the assembly of the disk device, the optical lens 1
When the distance between 159 and the signal recording surface 1161 changes significantly, that is, when the focus of the optical lens does not form an image on the signal recording surface 1161 within the movable range of the focus actuator 1155, the control circuit 1157 activates the turntable driving circuit 1158. . Turntable drive circuit 115
Numeral 8 energizes the exciting coil 1142 from the information of the control circuit 1157, and changes the height of the turntable 1028 magnetized by the excited exciting coil 1142. For example, when the voltage of the detector 1160 is positive even when the focus actuator 55 moves the optical lens 1159 to the vicinity of the top of the movable range of the optical lens, the control circuit 11
57 indicates a negative voltage to the turntable driving circuit 115
Send to 8. Then, the turntable driving circuit 1158
Energizes the exciting coil 1142 in the direction of lowering the turntable 1028, the turntable 1028 moves slightly downward, the focus of the optical lens 1159 falls within the movable range of the focus actuator 1155, and the optical pickup 1154 Information can be read.

Seventh Embodiment FIG. 10 shows a disk drive according to a seventh embodiment.
The disk device of this embodiment is provided with a suspension device that suspends the base 1021 in a floating manner with respect to the chassis 1241. Moreover, even when the disk device is oriented as shown in the drawing (the lower part is arranged in the drawing downward), the suspension is arranged when the left or right part is arranged in the drawing. It is also possible. Base 10
As described above, the turntable 1028 is held on the turntable 21, and the cartridge is mounted thereon. The base 1021 further holds a motor 1030,
The suspension device is for suspending the base 1021 holding these.

As shown in the drawing, the suspension system includes first to fourth suspensions.
Suspension magnets 1250 to 1253, first to fourth suspension coils 1254 to 1257, first and second pins 1258a and 1258b,
59a and 1259b.

Each of the first and second suspension magnets 1250 and 1251 is substantially rod-shaped, and
One end is fixed to the lower surface of one main plane portion 1021a, extends downward from the lower surface in a direction perpendicular to the lower surface, and is magnetized in that direction. One end of each of the third and fourth suspension magnets 1252 and 1253 is fixed to the outer surface of the side surface portions 1021b and 1021c of the base 1021, extends outward from the outer surface, and is magnetized in that direction. I have.

The first and second suspension coils 1254 and 1255 are respectively connected to the bottom plate 1241 of the chassis 1241.
a one end thereof is fixed to the upper surface of a, extends upward from the upper surface in a direction perpendicular to the upper surface, and the first and second suspension magnets 1250 and 1251 are inserted in the direction, and a current is passed. Sometimes magnets 1250 and 1251
Generates a magnetic field in the direction of magnetization. The third and fourth suspension coils 1256 and 1257 are respectively connected to the chassis 12
41 is fixed at one end to the inner surface of the side plates 1241b and 1241c, extends inward from the inner surface in a direction perpendicular to the inner surface, and has third and fourth suspension magnets 1252 in that direction. When a current flows, a magnetic field is generated in the direction of magnetization of the magnets 1252 and 1253.

The pins 1258a and 1258b are implanted (one end is fixed) on the side surfaces 1021b and 1021c of the base 1021, and extend outward from the side surfaces. Anti-vibration rubbers 1259a and 1259b are fixed to side plates 1141b and 1141c of chassis 1141, are engaged with pins 1258a and 1258b, and are fixed to chassis 1141.

The operation will be described below. When the disk device is mounted in a room such as an automobile or in a trunk, there are cases where the lower part in FIG. 10 is arranged as a lower part and where the right part or the left part in FIG. 10 is arranged as a lower part depending on the space. In any case, the base 1021 is used to prevent a problem in reproducing the disc due to the running vibration.
Is carried from the chassis 1141 by vibration isolating rubbers 1258a and 1258b formed of a viscoelastic body.

In the case where the lower part of FIG. 10 is installed downward, that is, the direction of arrow 1241Y is upward, the base 1021 and the parts attached to the base 1021 have the opposite weight to the arrow 1241Y due to the weight of the parts. Force acts in the direction. Then, a voltage is applied to the first suspension coil 224 and the second suspension coil 1255 to generate a magnetic field,
The base 1021 is pointed by the arrow 1241Y by the action of the suspension magnet 1250 and the magnetic flux generated by the second suspension magnet 1251.
And hold it at a position that balances the force due to the weight.

Also, when the display is installed with the right side of FIG. 10 facing downward, that is, with the direction of arrow 1241X facing upward, the base 1021 and the parts attached to the base 1021 are inverted by the weight of the arrow 1241X. Force works in the direction of. Therefore, a voltage is applied to the third suspension coil 1256 and the fourth suspension coil 1257 to generate a magnetic field, and the third suspension magnet 1252 and the fourth suspension magnet 12
The base 1021 is moved by the arrow 1 by the action of the magnetic flux generated by the base 53.
241X, and hold it at a position that balances the force due to the weight.

Similarly, when the display is installed with the left side of FIG. 10 facing downward, that is, with the direction opposite to the arrow 1241X facing upward, the arrow indicates the weight of the base 1021 and the parts attached to the base 1021. Force acts in the direction of 1241X. Therefore, the third suspension coil 1256 and the fourth suspension coil
A voltage opposite to the above is applied to the suspension coil 1257 to generate a magnetic field, and the magnetic field generated by the third suspension magnet 1252 and the fourth suspension magnet 1253 causes the base 1
021 is pushed up in the direction opposite to the arrow 1241X, and is held at a position that balances the force due to the weight.

In the above embodiment, the suspension coil 1
254 to 1257 on the chassis 1241 and the suspension magnet 1
Although 250 to 1253 are attached to the base 1021, the suspension magnets 1250 to 1253 are attached to the chassis 1241.
Alternatively, the suspension coils 1254 to 1257 may be attached to the base 1021. This has the advantage that the load (weight) of the suspension is reduced.

[0056]

In the disk drive of the present invention, the support shaft for rotatably supporting the turntable is axially urged by the elastic body, so that the vibration of the base is attenuated by the elastic body and the vibration of the turntable is reduced. This has the effect of suppressing the signal and obtaining a highly reliable device with less signal reading errors.

Further, a vibration-proof rubber is provided below the support shaft between the base and the chassis to suppress vibration of the chassis.
Since the base and the compression spring are arranged, the vibration of the base is attenuated by the vibration isolating rubber and the compression spring, and the vibration of the turntable is suppressed, so that there is an effect of obtaining a highly reliable device with few signal reading errors.

Further, since the exciting coil is opposed to the magnetized turntable, the turntable floats due to energization of the exciting coil, so that the vibration of the base becomes difficult to be transmitted to the turntable, and the signal reading error is reduced. This has the effect of obtaining a reliable device.

Further, the core and the magnet of the circumferentially opposed motor having the turntable and the support shaft in common are offset in the height direction, and the excitation coil is opposed to the magnetized turntable.

Further, since the excitation coil is opposed to the magnetized turntable and the energization of the excitation coil is controlled in conjunction with the operation of the cartridge transport mechanism, the height of the cartridge that moves horizontally by transporting the cartridge and the height of the turntable are controlled. The height can be overlapped, and there is an effect of obtaining a thin device.

Further, the excitation coil is opposed to the magnetized turntable, and the energization of the excitation coil is controlled in conjunction with a drive circuit for driving the focus actuator and a detector for detecting the defocus of the optical lens. Therefore, even if the disk height fluctuates beyond the movable range of the focus actuator, or if the disk height fluctuates beyond the movable range of the optical pickup, the optical pickup will It is possible to read or write, so that the accuracy of assembling the turntable can be simplified, and a highly reliable device with few signal reading errors can be obtained.

A plurality of suspension means each comprising a combination of a suspension magnet and a suspension coil are attached at different angles for holding the base by the chassis, and each suspension coil is attached to each suspension coil in accordance with a change in the attitude of the apparatus. Since the energizing voltage was changed, if the disk surface was installed horizontally or vertically with respect to the ground, or if it was installed at any other angle, the voltage of the suspension coil according to the angle As a result, a force against gravity is generated, the structure of the suspension means corresponding to the installation angle is simplified, and there is an effect that assemblability is improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a disk device according to a first embodiment of the present invention.

FIG. 2 is a measurement data diagram when the base is vibrated with the urging force of the leaf spring of the disk device in the first embodiment set to 80 g.

FIG. 3 is a measurement data diagram when the base is vibrated with the urging force of the leaf spring of the disk device according to the first embodiment set to 130 g.

FIG. 4 is a longitudinal sectional view illustrating a disk device according to a second embodiment of the present invention.

FIG. 5 is a schematic plan view showing a disk device according to a second embodiment.

FIG. 6 is a longitudinal sectional view showing a disk device according to a third embodiment of the present invention.

FIG. 7 is a longitudinal sectional view showing a disk device according to a fourth embodiment of the present invention.

FIG. 8 is a block diagram illustrating a disk device according to a fifth embodiment of the present invention.

FIG. 9 is a block diagram illustrating a disk device according to a sixth embodiment of the present invention.

FIG. 10 is a side view illustrating a configuration of a disk device according to Embodiment 7 of the present invention.

FIG. 11 is a longitudinal sectional view showing a configuration of a conventional disk chuck device.

FIG. 12 is a longitudinal sectional view showing a state where a disk is mounted on a conventional disk chuck device.

FIG. 13 is a perspective view showing a chuck magnet having a single magnetic domain structure magnetized in one direction.

FIG. 14 is a perspective view showing a chuck magnet having a stripe magnetic domain structure magnetized in both directions.

FIG. 15 is a conceptual view of a mechanism showing an example of a disk loading / unloading device of a recording / reproducing device using a disk chuck device.

[Explanation of symbols]

1002 spindle, 1021 base, 1023 disk, 1028 turntable, 1030 motor, 1042 claping plate, 1109 magnet for chuck, 1120 leaf spring, 1122 motor, 1126 yoke, 1142 excitation coil, 1
152 system control circuit, 1153 cartridge transport mechanism, 1155 focus actuator, 1156 drive circuit, 1159 optical lens,
1160 detector, 1250 suspension magnet, 125
1 suspension magnets, 1252 suspension magnets, 1253
Suspension magnet, 1254 Suspension coil, 1255
Suspension coil, 1256 Suspension coil, 1257
Suspension coil.

 ──────────────────────────────────────────────────続 き Continuation of the front page (31) Priority claim number Japanese Patent Application No. 5-11573 (32) Priority date January 27, 1993 (Jan. 27, 1993) (33) Priority claim country Japan (JP) (31) Priority claim number Japanese Patent Application No. 5-84533 (32) Priority date April 12, 1993 (1993.4.12) (33) Priority claim country Japan (JP) (72) Inventor Makoto Tomita Mimi 1 Baba Zujo, Nagaokakyo-shi, Kyoto, Japan Mitsubishi Electric Corporation, Electronic Product Development Laboratory (72) Inventor Kunihiko Nakagawa 1 Baba Zojo, Nagaokakyo-shi, Kyoto Mitsubishi Electric Corporation, Electronic Product Development Laboratory

Claims (15)

[Claims] 1. A disk device for recording or reproducing signals using light or magnetism, comprising: a disk chuck device for holding a disk on a rotatable turntable; a support shaft for rotatably supporting the turntable; A disk device, comprising: an elastic body for urging the shaft with a predetermined urging force in the axial direction. 2. The disk drive according to claim 1, wherein said urging force is set to 60 to 100 g. 3. A disk device for recording or reproducing signals using light or magnetism, comprising: a support shaft rotatably provided; a turntable fixed to the support shaft and holding a disk; A disk device comprising: a vibration isolating member interposed between the support shaft and the support shaft. 4. The apparatus according to claim 1, further comprising: a base supported on the chassis via a vibration isolating member, wherein the support shaft is provided rotatably with respect to the base and slidable in the axial direction. 4. The disk device according to claim 3, wherein: 5. A disk device for recording or reproducing signals using light or magnetism, comprising: a rotatable turntable having a first surface for holding a disk and a second surface opposite to the first surface; An exciting coil, a part of the turntable is magnetized, the magnetized surface is formed on the second surface side, and the exciting coil is arranged to face the magnetized surface of the turntable. A disk drive, wherein the turntable can be levitated by energizing the excitation coil. 6. The disk drive according to claim 5, wherein said exciting coil is mounted on a base. 7. A disk device for recording or reproducing a signal using light or magnetism, wherein the disk device is rotatably supported on a base and holds a disk and a second surface opposite to the first surface. A turntable part of which is magnetized and whose magnetized surface is formed on the side of the second surface; a circumferentially opposed type having a common shaft with the turntable and having a magnet and an iron core A turntable drive motor; and an excitation coil attached to a base and disposed opposite to a magnetized surface of the turntable. The drive motor magnet and the iron core are vertically shifted in center in height. The height of the turntable is determined by the balance between the repulsive force between the magnetized turntable and the exciting coil by energizing the exciting coil and the attractive force of the iron core and the magnet. Position Disk and wherein the. 8. A disk device for recording or reproducing signals using light or magnetism, a mechanism for transporting a disk or a cartridge containing the disk, and a mechanism rotatably and axially movable with respect to a base. A turntable having a first surface for holding a disk and a second surface opposite to the first surface, a portion of which is magnetized and whose magnetized surface is formed on the second surface side; An excitation coil attached to the base and arranged opposite to a magnetized surface of the turntable; a control circuit for controlling the axial movement of the turntable and driving of the cartridge transport mechanism; and the transport mechanism. A disk drive which controls the energization of the exciting coil in conjunction with the operation of (1). 9. When the disk or cartridge is transported toward the turntable by the transport mechanism, the turntable is moved in the axial direction from the first surface to the second surface. 9. The disk device according to claim 8, wherein the disk or the cartridge is easily mounted on the turntable. 10. A disk device for recording or reproducing a signal using light or magnetism, wherein the first surface is provided rotatably and axially movable with respect to a base and holds a disk, and a first surface opposite to the first surface. A turntable having a second surface on the side, a part of which is magnetized, and a magnetized surface formed on the side of the second surface; and a magnetized surface of the turntable attached to the base. An excitation coil disposed opposite to the sensor, a driving circuit for driving a focus actuator, and a detector for detecting a defocus of the optical pickup; and controlling excitation of the excitation coil in accordance with an output of the detector to control the excitation coil. A disk device characterized in that the turntable is moved in the axial direction by an electromagnetic force between the turntable and the magnetized turntable. 11. A driving circuit for driving a focus actuator in accordance with an output of the detector, wherein when the defocus is within a predetermined range, control is performed to reduce the defocus by driving the focus actuator. When the defocus exceeds the predetermined range, energization of the exciting coil is controlled to move the turntable in the axial direction so that the defocus is within the predetermined range. Item 11. The disk device according to item 10. 12. A disk device for recording or reproducing a signal by using light or magnetism, comprising: a chassis; a disk holding a disk on a rotatable turntable; and a base supporting the turntable; A plurality of suspension devices for suspending the base, each of the suspension devices comprising a combination of a magnet and a coil each mounted on the base and the other mounted on the chassis, each of which receives a load in a different angular direction; A disk device characterized by having. 13. The disk device according to claim 12, further comprising a vibration isolating member interposed between said base and said chassis. 14. The disk device according to claim 12, wherein the magnet has a rod shape and is inserted into a hollow portion of the coil. 15. The disk drive according to claim 12, further comprising means for changing a voltage applied to each suspension coil in accordance with a change in the attitude of the disk drive.