JPH0750058A - Disc drive - Google Patents

Abstract

PURPOSE:To provide a disc drive in which the disc is protected against damage at the time of replacement while enhancing the operability by stopping the rotation of the disc with no waiting time at the time of replacement thereof. CONSTITUTION:In a disc player where a tray 300 mounting a disc is inserted into a cabinet 400 and removed therefrom, the feeder line from a power supply circuit in the cabinet to a disc motor 201 disposed on the tray is interrupted when the tray 300 is discharged from the cabinet and the feeder line for the disc motor is short-circuited immediately thereafter. Consequently, brake force is applied to the disc motor rotating with inertia thus stopping the rotation quickly and forcibly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a CD player, a CD-
The present invention relates to a disk drive device such as a ROM drive and a magneto-optical disk drive.

[0002]

2. Description of the Related Art In recent years, a turntable, a motor for driving the same, a pickup, a feed mechanism thereof, and the like are integrally housed in a tray for housing a disc to be reproduced, and the tray is mounted on a cabinet of an apparatus. Disk drive devices have been developed that are configured to be removable. According to this disc reproducing apparatus, by providing the turntable with the chucking mechanism for stably holding the disc, a mechanism for moving the turntable in the vertical direction, a clamper, etc. are unnecessary,
The device can be made thinner overall.

However, in this disk drive device,
It is necessary to connect the cabinet-side circuit board and the tray-side circuit board through a long flexible cable having many signal lines. For this reason, when the tray is ejected, the flexible cable exposed to the outside serves as an antenna and is a source of radiation noise, which causes an external device (for example, a host computer) to interfere with the noise.
Further, it is necessary to secure a storage place of the flexible cable in the cabinet when the tray is stored, and the depth dimension becomes large.

In order to solve these problems, various disc reproducing apparatuses having a structure in which only a disc drive system including a turntable and a disc motor is mounted on a tray have been considered. According to this disk reproducing apparatus, the circuit board on the cabinet side and the circuit board on the tray side need only be connected by two signal lines for supplying power to the disk motor, and the radiation noise can be reduced.

The structure of the electrical coupling portion between the tray and the cabinet in the conventional disk drive device will be described with reference to FIG.

As shown in the figure, in the conventional disk drive device, a pickup 701 and a power supply circuit 702 are provided on the cabinet 700 side in consideration of the arrangement efficiency of the entire device.
However, the disk motors 704 are arranged on the tray 703 side. Further, a socket 705 to which wiring from the power supply circuit 702 is connected is disposed on the back side wall surface portion of the cabinet 700, and a connector to which wiring from the disk motor 704 is connected to a position of the tray 703 corresponding to this socket 705. 706 is provided.

When operating this disc drive apparatus, the user first puts a disc, for example, a compact disc (hereinafter referred to as a CD) 707 on the tray 703, and then pushes the tray 703 into the cabinet 700. Then, the connector 706 of the tray 703 is joined to the socket 705 and power is supplied to the disc motor 704 from the power supply circuit 702, and the disc motor 704 rotates the CD 707 on the tray 703. At this time, the pickup 701 is moved to a predetermined position on the CD 707 to read the pit and reproduce the information on the CD 707.

On the other hand, from this disc drive device to a CD
When the tray 703 is taken out, the tray 703 is pulled out from the cabinet 700, the connection between the connector 706 and the socket 705 is broken, and the power supply to the disc motor 704 is cut off. All you have to do is to wait for the rotation to stop before taking out.

By the way, the disk motor 704 of the disk drive device continues to rotate for some time due to inertia even after the power supply is cut off.

However, without the user knowing it,
If the CD 707 is taken out immediately after pulling out the tray, it is very dangerous because the CD 707 is rotating and the CD 707 is dropped or brought into contact with the cabinet 700 or the like.

[0011]

As described above, in the above-described conventional disc drive device, when the tray is pulled out and the disc is taken out, the disc motor rotates for a certain period of time due to inertia despite the power being cut off. Since it continues, there is a problem that a failure may occur due to a mistake on the part of the user.

The present invention has been made to solve the above problems, and an object thereof is to provide a disk drive device capable of safely taking out a disk.

[0013]

In order to achieve the above-mentioned object, a disk drive device of the present invention comprises a cabinet and a tray for accommodating a disk to be reproduced, which can be taken out from the cabinet. A tray supported by a cabinet, a motor arranged in the tray, for driving the disk stored in the tray, and a power supply circuit arranged in the cabinet, the motor comprising: A power supply circuit for generating electric power for driving, a power supply line for electrically connecting the power supply circuit and the motor, and the power supply circuit only when the tray is housed in the cabinet. Switch means for switching on / off the connection of the power supply line so that drive power is supplied from the When the power line is interrupted by serial switching means, and having a shorting means for shorting the power supply line on the side leading to the motor.

[0014]

According to the present invention, when the power supply line between the motor and the power supply circuit is cut off, the power supply to the motor is cut off and the motor rotates by inertia, while the power supply line leading to the motor is short-circuited. To be done. Then, a counter electromotive force is generated in the motor, and a braking force acts on the motor rotating by inertia, and the motor stops.

Therefore, when the tray is pulled out from the cabinet by the user, the rotation of the disc has already stopped, and the user can safely take out the disc.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the overall structure of a disk drive device according to an embodiment of the present invention, and FIG. 2 is a plan view thereof.

As shown in these drawings, the disc reproducing apparatus is roughly classified into a mechanical unit 100, a motor unit 200, a tray 300, and a cabinet 40.
It consists of zero.

The mechanical unit 100 has a chassis 100a on which various parts are mounted. A pair of guide shafts 101, 101 are supported by the chassis 100a in parallel with each other. One end of each of the guide shafts 101, 101 penetrates the guide shaft support portion 100b (shown in FIG. 2) and projects to the front side. The tips of the guide shafts 101, 101 protruding from the guide shaft support portion 100b are sharpened in a substantially conical shape. Each guide shaft 101,
A pickup 102 is suspended and supported between 101. Pickup 102 is each guide shaft 1
It is possible to move in the X-Y direction along arrows 01 and 101.

The mechanical unit 100 has a pair of lock levers 103, 103 and a pair of guide protrusions 104, 104. Each of the lock levers 103, 103 has a hook 103b, 103b at the front end thereof. The lock levers 103, 103 are rotatably supported on the chassis 100a via rotating shafts 103a, 103a fixed to the chassis 100a. Then, the respective lock levers 103, 103 respectively have hooks 10 for each other.
The springs 107, 107 receive pressure in the rotational direction that tends to reduce the distance between the 3b and 103b. Each of the guide protrusions 104, 104 has a pair of claws 104a, 104a divided into two forks. Each claw 104a,
Each of the 104a has a tapered surface at the top and left and right tip portions.

There are four corners of the chassis 100a.
Two damper rubbers 105 ... Are attached. The damper rubbers 105 ... Isolate and dampen vibrations transmitted from the cabinet 400 to the chassis 100a. A feed motor 106 for driving a pickup is mounted on the chassis 100a.

The motor unit 200 has the tray 30 when the tray 300 is ejected from the cabinet 400.
It is held in the two recessed portions 300a, 300a of 0. In addition, the motor unit 200 is configured such that when the tray 300 is housed in the cabinet 100, the mechanical unit 100.
Each guide shaft 101, 101, each lock lever 1
03, 103 and each of the guide protrusions 104, 104.

The tray 300 has two recesses 300a for holding the motor unit 200 and the front panel 3.
01 and a shutter 302. Each reinforcing plate 303 of the tray 300 has a plurality of guide pins 304, 304.
Is provided so as to project. These guide pins 304,
304 is inserted into a guide groove (not shown) provided on each side wall of the cabinet 400. These guide pins 3
Due to the engagement of the guide grooves 04 and 304 with the guide groove, the tray 300 can be moved in the arrow XY direction, and the cabinet 40 can be moved.
You can take it in and out from 0.

The shutter 302 has guide protrusions 302a, 302a on both sides. Each guide protrusion 302
a and 302a respectively form the side wall of the tray 300.
Guide grooves 303a and 303a of the three reinforcing plates 303 and 303
Has been inserted into. These guide protrusions 302a, 302
The shutter 302 holds the motor unit 2 held by the tray 300 by a and the guide grooves 303a, 303a.
00 for covering the upper surface of the motor unit 200 and the motor unit 200.
Can be moved in the direction of the arrow X-Y between the second position exposing the upper surface of the.

Further, the shutter 302 has two springs 30 so that the shutter 302 is always moved in the arrow X direction (direction from the second position to the first position).
It receives the pulling force from 2c and 302c. The force of each spring 302c, 302c is applied to the shutter 30 when the tray 300 is ejected from the cabinet 400.
2 serves to keep the 2 in a first position covering the upper surface of the motor unit 200. When the tray 300 is in the first position,
The individual lock members 305, 305 provided on the respective reinforcing plates 303, 303 are respectively provided with the individual lock holes 302 b, 302 provided on both side surfaces of the shutter 302.
fit in b. As a result, the shutter 302 is the first
In the position of, the shutter 302 is locked from opening and closing. Therefore, a disadvantageous act such as the user manually opening the shutter 302 to remove the motor unit 200 from the tray 300 is prevented. Details of this shutter lock mechanism will be described later.

As shown in FIG. 2, the cabinet 400 is provided with a tray lock device 110 for fixing the inserted tray 300 at a predetermined position in the cabinet 400. The tray lock device 110 fixes the tray 300 at a fixed position in the cabinet 400 by connecting with the striker 110a fixed to the tray 300. Details of the tray lock mechanism including the tray lock device 110 will be described later.

A socket 531 is arranged on the inner wall surface of the cabinet 400. This socket 5
When the tray 300 is housed in the cabinet 400, 31 is coupled with the connector 500 attached to the tip of one reinforcing plate 303 of the tray 300. Details of the socket 531 and the connector 500 will be described later.

Next, the details of each unit in the disc reproducing apparatus will be described in detail.

FIG. 3 is an exploded view of the motor unit 200.

As shown in the figure, the motor unit 200
Is composed of a disk motor 201, a motor block 202, a turntable 203, a magnetic plate 204, two springs 205, 205 and two pins 206, 206. The disk motor 201 is a motor block 20.
It is fixed to 2 with two screws 207, 207. A turntable 203 is fixed to a rotary shaft 201a of the disc motor 201. In addition, the motor block 202
A magnetic plate 204 is fixed by two pins 206, 206. Each pin 206, 206 has a threaded portion 206a, 206a in the middle thereof, and is inserted and fixed in two screw holes 202a, 202a provided in the motor block 202. Springs 205, 205 are fitted on the outer circumferences of the pins 206, 206, respectively.
The heads 206b and 206b of the reference numerals 6 and 206 and the magnetic plate 204 are sandwiched and held. By the way, the tip portions 206c and 206c of the pins 206 and 206 are respectively projected from the opposite surface of the motor block 202. The protruding portions 206c, 20 of these pins 206, 206
6c are the lock levers 103 and 10 described above.
3 hooks 103b and 103b.

The motor block 202 has two notches 202e and 2e for forming two spaces (guide holes) along the direction of inserting and removing the tray 300 with the magnetic plate 204.
Has 02e. These two guide holes have trays 30
When 0 is stored in the cabinet 400, the guide protrusions 104, 104 of the mechanical unit 100 described above are respectively inserted.

The motor block 202 has the above-mentioned structure when the tray 300 is stored in the cabinet 400.
V into which the tip portions of the two guide shafts 101, 101 (protruding portions from the guide shaft support portion 100b) are respectively inserted
It has a groove 202b and an elliptical hole 202c. V groove 202b
Has a V-shaped cross section so that the motor block 202 can be accurately positioned with respect to the guide shaft 101. Further, although not shown in the drawing, a taper is formed at each entrance portion of the V groove 202b and the elliptical hole 202c so as to facilitate smooth insertion of the guide shafts 101, 101. The cross-sectional shape of the groove 202b may be any shape, such as a semicircle, as long as the guide shaft 101 can be guided to a fixed position in the groove 202b.

Further, the motor block 202 has two recessed portions 300 provided on the tray 300 at both ends thereof.
It has leg portions 202d and 202d fitted in a and 300a. These legs 202d and 202d are the tray 30.
The motor unit 200 can be held at a predetermined position on the tray 300 by being fitted into the respective recessed portions 300a of the 0, 300a.

FIG. 4 shows the leg portions 202d and 202d and the recess portion 3
It is a figure which shows the connection relation with 00a and 300a. Figure 4
4A is a state immediately before the motor block 202 is held on the tray 300, and FIG.
Shows the state of being held on the tray 300. Further, the left figure is a view of this portion from the front side of the apparatus, and the right figure is a side view of the apparatus.

As shown in the figure, the hollow portion 300a of the tray 300 has a leg portion 202 which is inserted from above into the hollow portion 300a.
It has four taper surfaces for guiding d to a fixed position in the recess 300a. On the other hand, the leg portion 20 of the motor block 202
2d has four taper surfaces in contact with the respective taper surfaces of the recess 300a at the tip. The plane size of the opening surface and the bottom surface of the recess 300a is larger than the plane size of the leg 202d. The difference between these plane sizes is that each leg 202
It is necessary as a margin when fitting d and 202d into the recesses 300a and 300a. Each leg 202d, 20
When the 2d is fitted into the recesses 300a, 300a, the leg portions 202d, 2d, 2d, 2d are guided by the respective tapered surfaces even if the positional relations of the recesses are slightly different from each other.
02d slides down to a fixed position in the depressions 300a, 300a.

The motor unit 200 is the mechanical unit 10
When held on the 0 side, as shown in FIG. 4 (a), the leg portions 202d, 202d are respectively indented portions 30.
0a and 300a are placed at a position slightly above the bottom surface.
Therefore, the tray 300 and the motor unit 200 are in a non-contact state, and vibration is not transmitted from the tray 300 to the motor unit 200.

Next, the turntable 203 will be described with reference to FIG.
Will be described in detail. In the figure, (a) shows the disk 6
State before putting 00 on the turntable 203,
(B) shows a state after the disc 600 is placed on the turntable 203.

The turntable 203 is a disc 600.
Disc chuck 203 coupled with the center hole 600a of the disc
a. A plurality of balls 203b ... Are embedded in the outer peripheral portion of the disc chuck 203a so as to expose a part thereof. In the enlarged view, these balls 203b ... Are movable so as to be movable between the position shown by the solid line and the position shown by the dotted line.
Held in. Each ball 203b ... Receives pressure from a spring (not shown) arranged in the disc chuck 203a so as to be pushed out from the center of the disc chuck 203a toward the outer periphery.

When the disc 600 is placed on the turntable 203, the balls 203b ... Contact the inner wall of the central hole 600a of the disc 600 and receive pressure from the outside to reach the position indicated by the dotted line in the disc chuck 203. Move once. When the disc 600 is placed at a fixed position on the turntable 203, each ball 203b ... Is pushed outward again by the force of the spring. As a result, as shown in FIG. 5B, the disc 600 is fixed on the turntable 203 so as to be pressed from above by the balls 203b.

Next, the lock mechanism of the shutter 302 will be described in detail with reference to FIG. Here, FIG. 6A shows the locked state and FIG. 6B shows the unlocked state.

The lock members 305, 305 provided on the respective reinforcing plates 303, 303 of the tray 300 are made of, for example, elastic members made of mold. As shown in the figure, one end of the lock member 305 is fixed on the tray 300 with a screw 306. Also, the lock member 305
Has a projection 305b fitted in a lock hole 302b provided in the shutter 302 at the other end. In addition, the lock member 305 has a curved portion 305a that is folded back in a U shape in the middle thereof.

Next, the operation of this shutter lock mechanism will be described. When the tray 300 is ejected from the cabinet 400, as shown in FIG.
5, the projection 305b is the lock hole 302 of the shutter 302.
fit in b. This locks the opening and closing of the shutter 302.

When the lock is released, the lock member 30
The tip of the projection 305b of No. 5 is pressed in the direction of arrow A, and the lock member 305 is elastically deformed at least until the surface c of the projection 305b reaches the position where it contacts the surface of the lock hole 302. After the surface c of the protrusion 305b contacts the surface of the lock hole 302b, if the shutter 302 is moved in the arrow Y direction, the protrusion 305b is elastically deformed by the lock member 305.
Are pushed inside the tray 300. As a result,
As shown in (b), the protrusion 305b of the lock member 305
Comes out of the lock hole 302b and the lock is released.

Next, details of the tray lock mechanism described above will be described. FIG. 7 is a diagram showing the configuration of the tray lock mechanism.

In the figure, 110 is a cabinet 40.
The tray lock device 110a provided in the 0 is a striker fixed to the tray 300. The tray lock device 110 is fixed on the slider 120 via a mounting portion 120a. The slider 120 is rotatably supported by the cabinet 400 via a rotation shaft 450. The rotation range of the slider 120 is limited by the pin 460 fixed to the cabinet 400 and the elongated hole 120c provided in the slider 120. One end of a spring 700 is connected to the end of the slider 120. The other end of the spring 700 is the cabinet 400
It is supported by a pin 470 fixed to the. That is,
A force for rotating the slider 120 in the arrow X direction about the rotation axis 450 is applied to the spring 700.
More added. Since the rotation range of the slider 120 is limited by the pin 460 and the elongated hole 120c, the slider 120 normally maintains the state of FIG. 7A by the pulling force of the spring 700.

In FIG. 7B, the tray 300 is exposed to a large impact.
It shows a state when it is added to the tray lock device 110 through. At this time, if the tray lock device 110 receives an impact larger than the tensile force of the spring 700.
When it is added to the
The length of L is extended, and the slider 120 rotates by the angle θ. As a result, the peak value of the impact force applied to the tray lock device 110 is reduced, and the tray lock device 110 is reduced.
Can be prevented from being damaged. In this case, if the slider 120 has a structure in which the slider 120 is in surface contact with the cabinet 400, shock absorption can be further enhanced by a friction effect. Further, a member having a large frictional resistance such as rubber may be arranged between the slider 120 and the cabinet 400. FIG. 8 is a diagram showing details of the tray lock device 110. In the figure, (a) shows the state of the tray lock device 110 when unlocked, and (b) shows the state of the tray lock device 110 when locked.

As shown in the figure, the tray lock device 110 has a lock slider 131 which is movable in the directions of arrows XY. This lock slider 131
A spring (not shown) applies a pressure in the direction of the arrow Y to. When unlocked, the lock slider 131 is in the position shown in (a). The lock slider 131 has a pair of arms 132, 132 at one end thereof for holding the tip portion of the striker 110a. A guide groove 133 is provided on the surface of the lock slider 131. A member 1 rotatably supported by the main body 134 of the tray lock device 110 is provided in the guide groove 133.
The pin 136 of 35 is inserted. A spring (not shown) applies a force to the member 135 to rotate it in the direction of arrow R.

Next, the operation of the tray lock device 110 will be described. When locking the tray 300, first, the tip 141 of the striker 110a is locked by the lock slider 131.
It hits the facing surface 151. The lock slider 131 is pushed into the tray lock device 110 (main body 134) by the pressure from the striker 110a. As the lock slider 131 is pushed into the main body 134, the arms 132, 132 rotate in the direction in which they try to reduce the mutual distance. At the same time, the guide groove 133
The pin 136 inserted in the position sequentially moves from the position P1 to the positions P2 and P3. Tray 300 is cabinet 40
At the time when the striker 11 is inserted to the limit within 0, as shown in FIG.
The holding of 0a is completed. At this time, the pin 136 is at the position P4. After that, when the user releases the finger from the tray 300, the lock slider 131 is springed (not shown).
Is slightly returned in the direction of the arrow Y, and the pin 136 moves to the position P5. This completes the tray lock.

When it is desired to release the tray lock, the tray 300 is pushed in the arrow X direction. As a result, the pin 136 moves from the position P5 to the position P6. Pin 136 is P
By releasing the finger from the tray 300 at the position of 6, the lock slider 131 is ejected in the arrow Y direction by the force of the spring (not shown). As a result, the arms 132, 132 rotate in the direction in which they try to increase the distance from each other, and at the same time, the striker 110a is pushed out in the arrow Y direction. At the same time, the pin 136 returns from the position of P6 to the original position of P1 through the position of P7. This unlocks the tray 300.

Next, the details of the socket 531 and the connector 500 described above will be described with reference to FIG. As shown in the figure, the connector 500 attached to the tray 300 has a pair of electrode plates 502 and 504 each having a property as a leaf spring. The electrode plates 502 and 504 are vertically fixed to the surface of the connector 500 so that their surfaces face each other. Each of the electrode plates 502 and 504 is connected to a power supply line (plus pole / minus pole) for supplying drive power to the disk motor 201. In addition, each electrode plate 502, 50
Bent portions 503 and 505 having curved shapes that are in contrast to each other are provided at the tip of No. 4. When the socket 531 and the connector 500 are not coupled, each bent portion 503,
505 are in contact with each other at their intermediate portions in a state where they are pressed against each other by their elasticity. Socket 531
Has a pair of contacts 532, 534 which are respectively joined to the pair of electrode plates 502, 504 described above. Each contact 5
Each of 32 and 534 is connected to a power supply line (plus pole / minus pole) that communicates with a power supply circuit (not shown) in the cabinet 400. Further, the socket 531 is provided with an insulating protrusion 535. When the tray 300 is inserted into the cabinet 400, the insulating protrusion 535 is
Bending portion 50 of each electrode plate 502, 504 of connector 500
The gaps 3 and 505 enter the gaps between the electrode plates 502 and 504, and spread the electrode plates 502 and 504 to guide the tips of the bent portions 503 and 505 to the contacts 532 and 534 of the socket 531.

When the tray 300 is pulled out from the cabinet 400, the tips (bent portions 503 and 505) of the electrode plates 502 and 504 of the connector 500 separate from the contacts 532 and 534 of the socket 531 respectively, and the disk motor 2
The drive power to 01 is cut off. Disk motor 2
For a while after the supply of drive power to 01 was cut off,
The disk motor 201 continues to rotate due to inertia.
During this time, the bent portions 503 and 505 of the electrode plates 502 and 504 of the connector 500 are not in contact with each other by the insulating protrusions 535. After that, the tray 300 is further pulled out, so that the bent portions 503 and 505 of the electrode plates 502 and 504 of the connector 500 are separated from each other by the insulating protrusions 53.
Remove from 5. As a result, each electrode plate 5 of the connector 500
The bent portions 503 and 505 of 02 and 504 contact each other at their intermediate portions, and the power supply line leading to the disk motor 201 is short-circuited. At this moment, a counter electromotive force is generated in the disk motor 201 that has been rotating due to inertia until then. This counter electromotive force generates a force that brakes the rotation of the disk motor 201, and the disk motor 201
Rotation is forcibly stopped. Therefore, in this disc reproducing apparatus, when the tray 300 is completely pulled out from the cabinet 400, the disc motor 201 is already in a stationary state, and therefore when the disc 600 is taken out from the tray 300, damage to the disc 600 or the like is prevented. Can be prevented.

By the way, this disc reproducing apparatus has no other line for electrically connecting the tray side and the cabinet side, other than the line for supplying power to the disc motor 201 described above. That is, since no electrical components other than the disc motor 201 are mounted on the tray 300, electrical connection between the tray side and the cabinet side is made from the power circuit arranged in the cabinet 400 to the disc motor 201. Only a line for supplying drive power is required. Therefore, it becomes unnecessary to use a flexible cable or the like. Accordingly, it is not necessary to secure a storage place of the flexible cable in the cabinet 400 when the tray 300 is stored in the cabinet 400, and the cabinet 400 can be downsized.

Further, from the power circuit to the disk motor 20
The line for supplying driving power to the tray 1 is the tray 300.
Is cut off while being discharged from the cabinet 400, there is no need to worry about radiation noise (unnecessary radiation) being emitted from this power supply line. That is, cabinet 4
Although a circuit board equipped with a clock generator that generates a clock for reading digital data exists in 00 as a source of unnecessary radiation, the power supply line is disconnected when the tray 300 is ejected from the cabinet 400. Therefore, there is no concern that radiation noise (unnecessary radiation) will be generated from this power supply line.

Next, the overall operation of this disk drive device will be described.

In FIG. 2, the tray 300 is a cabinet 400.
It is a figure showing a state when being discharged from. At this time, the upper surface of the motor unit 200 held by the tray 300 is covered by the shutter 302. At this time, the shutter 302 is locked by the shutter lock mechanism shown in FIG. 6, and opening / closing is prohibited.

FIG. 10 is a view of FIG. 2 viewed from the front side of the apparatus. At this time, as shown in FIG.
0 is held in the recesses 300a, 300a of the tray 300. In addition, the two magnets 306, 306 fixed to the tray 300 draw the magnetic plate 204 of the motor unit 200 downward, so that the motor unit 200
Are stably held on the tray 300.

The point to be noted here is that the mechanical unit 10
0 is a relative position (height) relationship between the guide shafts 101, 101 and the guide protrusions 104, 104 of 0, and the motor block 202. In the state shown in FIG.
Each guide shaft 101, 101 and each guide protrusion 10
The heights of 4 and 104 are the motor block 202.
Of the V groove 202b, the elliptical hole 202c, and each space (hole) formed between the motor block 202 and the magnetic plate 204.

Then, the tray 300 is manually pushed in the direction of the arrow X. FIG. 11 is a view showing a state in which the tray 300 is being loaded. As shown in FIG.
When the tray is pushed into the cabinet 400 to some extent, the surfaces of the tray guides 401 and 401 arranged on both side surfaces of the cabinet 400 come into contact with the protrusions 305b and 305b of the lock members 305 and 305 of the shutter lock mechanism, respectively. The protrusions 305b and 305b are pushed into the tray 300, respectively. This allows the shutter 302
Is unlocked.

On the other hand, the protrusions 302a provided on both sides of the shutter 302 are attached to sliders (not shown) supported inside the tray guides 401 via springs (not shown) during loading. Fit in. When the tray 300 is pushed to the position shown in FIG. 11,
The force of the spring causes the shutter 302 to pass through the slider.
And the shutter 302 is opened. Figure 11
At, the shutter 302 is fully opened, and the motor unit 200 is exposed.

Thereafter, the tray 300 is replaced with the cabinet 40.
When pushed deeper into 0, as shown in FIG. 12, the tip portions (pawls 104a, 104a) of the guide protrusions 104, 104 of the mechanical unit 100 are formed between the motor block 202 and the magnetic plate 204. It goes into two different spaces (holes). When the guide protrusions 104, 104 enter the holes, the difference in height between the guide protrusions 104, 104 and the holes is that the tip portions of the guide protrusions 104, 104 (the claws 104a, 104a,
It is smoothly corrected by the taper surface provided on the upper surface of 104a). As a result, the motor unit 200 is slightly lifted from the recesses 300a, 300a of the tray 300.

At the time of FIG. 12, the guide shafts 101, 101 are still in the V groove 2 of the motor block 202.
02b and the elliptical hole 202c are not inserted.

After that, the tray 300 is replaced with the cabinet 40.
When it is pushed deeper into 0, as shown in FIG. 13, the tip portions of the guide shafts 101, 101 become V-shaped groove 202b and elliptical hole 202c of the motor block 202.
Enter each. At this time, each guide shaft 10
The upper ends of 1, 101 are V-grooves 202 of the motor block 202.
It is at a position slightly higher than the upper ends of b and the elliptical hole 202c. Therefore, each of the guide shafts 101, 101 has the V groove 202b and the elliptical hole 20 of the motor block 202
2c, the leg portions 202d and 202d of the motor block 202 are inserted into the tray 3 as shown in FIG.
00 is further raised from the respective depressions 300a, 300a.

On the other hand, as shown in FIG. 13, the two pins 206, 206 protruding from the upper surface of the motor block 202.
Contacts the first cam surfaces of the hooks 103b and 103b of the two lock levers 103 and 103 provided in the mechanical unit 100, and applies pressure to the lock levers 103 and 103. As a result, each lock lever 103, 10
Numeral 3 rotates in the direction of the arrow about the rotary shafts 103a and 103a. Further, from this point, the striker 110 a provided on the tray 300 is attached to the tray lock device 11.
It begins to get into 0.

After that, the tray 300 is replaced with the cabinet 40.
When it is pushed deeper into 0, as shown in FIG. 13, the tip portions of the guide shafts 101, 101 become V-shaped groove 202b and elliptical hole 202c of the motor block 202.
Enter each. At this time, each guide shaft 10
The upper ends of 1, 101 are V-grooves 202 of the motor block 202.
It is at a position slightly higher than the upper ends of b and the elliptical hole 202c. Therefore, each of the guide shafts 101, 101 has the V groove 202b and the elliptical hole 20 of the motor block 202
2c, the leg portions 202d and 202d of the motor block 202 are inserted into the tray 3 as shown in FIG.
00 is further raised from the respective depressions 300a, 300a.

After this, the motor block 202 is moved to the tray 3
00 is pressed by the two end surfaces 310, 310 of the motor block 202, the leg portions 202d, 202 of the motor block 202 are pressed.
d is X in each recess 300a of the tray 300, 300a
It is moved to the limit position of the direction. As shown in FIG. 4, the length of the recess 300a in the XY direction is equal to the X- of the leg portion 202d.
It is set larger than the length in the Y direction. Therefore, by pushing the motor block 202 in the direction of the arrow X with each end surface 310, 310 of the tray 300, each leg 2
02d and 202d can be moved within the recesses 300a and 300a by a predetermined distance in the arrow X direction.

By moving the motor unit 200,
The rotation angle of each lock lever 103, 103 increases.
Then, when the lock levers 103, 103 rotate to a predetermined angle, as shown in FIG.
The two pins 206, 206 protruding from the upper surface of 00 are
Hooks 103b, 10 of each lock lever 103, 103
It rides on the 2nd cam, over the 1st cam of 3b.
As a result, the lock levers 103, 103 are rotated in the opposite directions by the pulling forces of the springs 107, 107, respectively. This lock lever 103, 1
The motor unit 200 is pulled toward the mechanical unit 100 by the rotational force of 03. As a result, the motor unit 200 is moved to a position where the inner wall surface 210 of the motor unit 200 contacts the end surface 111 of the guide shaft support portion 100b. This achieves the positioning of the motor unit 200 in the X-Y directions.

On the other hand, the socket 531 arranged in the cabinet 400 and the connector 500 arranged in the tray 300 enter the combined state from a time point slightly before the motor unit 200 hits the guide shaft support portion 100b. In this case, first, each electrode plate 50 provided on the connector 500
When the bent portions 503 and 505 of 2,504 come into contact with the insulating protrusion 535 of the socket 531, the bent portions 503 and 505 that have been in contact with each other gradually increase the distance between them, and finally the socket 531. Of the contact points 532 and 534 respectively. In the tray 300, each bent portion 503, 505 has each contact point 53.
After the first contact with 2, 534, the amount is moved a little further in the back. During this time, the bent portions 503 and 505 maintain the electrical connection with the contact points 532 and 534 due to their elastic deformation.

At this time, the motor unit 200 is
Each guide shaft 101, 101 and each lock lever 10
It is held by the mechanical unit 100 in a state that it is sandwiched by 3 and 103 from above and below. As a result, the positioning of the motor unit 200 in the height direction is achieved.

On the other hand, at this time, the striker 110a enters into the lock-on position in the tray lock device 110. This tray lock device 110 is a striker 11
After 0a reaches the lock-on position, it has a structure in which the striker 110a is slightly pushed back by the force of a spring (not shown) incorporated inside. Therefore, finally, as shown in FIG. 16, the tray 300 is locked at a position slightly returned in the Y direction from the state of FIG. At this time, the motor unit 200 has the lock levers 103, 1
Since the movement in the arrow Y direction is restricted by 03, the end surface 211 of the motor block 202 and the tray 300 are
A slight gap is formed between the end face 310 and the end face 310. As a result, the tray 300 and the motor unit 200 are in a non-contact state. On the other hand, the bent portions 503 and 505 of the electrode plates 502 and 504 provided on the connector 500 and the contacts 532 and 534 of the socket 531 are, when the tray 300 is slightly returned in the Y direction and the disk loading is completed as described above. Also maintains contact.

The state where the disc loading is completed will be described in more detail with reference to FIG. When the tray lock is completed, the motor block 202 is connected to each guide shaft 10
1 and 101 are inserted into the V-groove 202b and the elliptical hole 202c, and are held on the mechanical chassis 100 side. As a result, the motor block 202 is set to the specified height. In addition, the V groove 20 provided in the motor block 202
2c has a V-shaped cross-sectional shape. Therefore, this V
By receiving one of the guide shafts 101 along the groove 202c, the motor block 202 is set at a specified lateral position. On the other hand, each guide protrusion 104, 10
4 descends in each space (hole) formed between the motor block 202 and the magnetic plate 204, and pushes down the magnetic plate 204 against the force of each spring 205, 205. Then, the repulsive force of each spring 205, 205 is the pin 20.
Is transmitted to the motor block 202 through 6, 206,
It acts as a force pulling the motor block 202 downward. As a result, the motor block 202 is firmly supported on each guide shaft 101, 101.

Further, at this time, the leg portions 202d and 202d of the motor block 202 are respectively formed in the recess portions 3 of the tray 300.
00a, 300a, and the tray 30
0 and the motor block 202 are in a non-contact state. Therefore, the vibration is not transmitted to the motor unit 200 through the tray 300.

After the transfer of the motor unit 200 to the mechanical unit 100 is completed in this way, the pickup 102 moves in the arrow Y direction from a position off the plane of the data area of the disc 600. In FIG. 15, the line indicated by M indicates the position of the outermost track of the data area on the disc 600. By the movement of the pickup 102 in the arrow Y direction, when the shaft holding portion 102a of the pickup 102 hits the end surface of the guide shaft support portion 100b, the movement of the pickup 102 is stopped and the reproducing operation is started.

When the tray 300 is to be ejected from the cabinet 400, the tray 300 is pushed in the arrow X direction with a finger. As a result, the lock of the tray lock mechanism is released, and the tray 300 is pulled out slightly to the front. Thus, the tray 300 is automatically pulled out by a certain amount, so that the user can pull out the tray 300 in the direction of the arrow Y with his / her hand. As shown in FIG. 4, the leg portions 202d and 202d of the motor unit 200 are connected to the tray 3
00 is placed in each of the recessed portions 300a, 300a in a floating state or in a contacting state. Therefore,
By pulling out the tray 300 in the direction of the arrow Y, the motor unit 200 is pulled away from the holding position on the mechanical unit 100 side, and the holding position of the tray 300 (the depression 300
a, 300a).

When the tray 300 is pulled out from the cabinet 400, each electrode plate 5 provided on the connector 500 is
Bent portions 503 and 505 of 02 and 504 are sockets 531
Disc motor 2 is separated from each contact 532, 534 of
The power supply to 01 is cut off. Immediately after the power supply is cut off, the disk motor 201 is rotated by inertia. After that, when the tray 300 is further pulled out, the bent portions 503 and 505 of the electrode plates 502 and 504 come off from the insulating protrusion 535. As a result, each electrode plate 50
The bent portions 503 and 505 of 2,504 come into contact with each other, and the two power supply lines (plus pole / minus pole) leading to the disk motor 201 are short-circuited. At this moment, a counter electromotive force is generated in the disk motor 201 that has been rotating due to inertia, and a force acts in a direction to brake the rotation of the disk motor 201 to stop the rotation of the disk motor 201. Therefore, after the user pulls out the tray 300, the user can safely and promptly remove the disc 600 from the tray 300 without waiting for the disc 600 to stop.

[0075]

As described above, according to the disk drive apparatus of the present invention, when the tray is ejected from the cabinet, the power supply to the disk motor is cut off and the power supply line leading to the disk motor is short-circuited. ,
The braking force acts on the disk motor that has been rotating due to inertia after the power supply is cut off, and the rotation can be forcibly stopped.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall configuration of a disk drive device according to an embodiment of the present invention.

FIG. 2 is a plan view of the disk drive device shown in FIG.

FIG. 3 is an exploded perspective view showing a configuration of a motor unit in FIG.

4 is a cross-sectional view showing a coupling relationship between a leg portion provided in the motor block of FIG. 3 and a recessed portion of a tray.

5 is a diagram showing a configuration of a turntable in the motor unit of FIG.

FIG. 6 is a plan view showing a configuration of a shutter lock mechanism.

FIG. 7 is a plan view showing a configuration of a tray lock mechanism.

8 is a plan view showing the configuration of a tray lock device in the tray lock mechanism of FIG. 7. FIG.

FIG. 9 is a perspective view showing a configuration of an electrical connection portion between a tray and a cabinet.

10 is a cross-sectional view of the disk drive device of FIG. 2 viewed from the front side.

FIG. 11 is a plan view showing a state of the disk drive device during loading.

FIG. 12 is a sectional view of the state of the disk drive device during loading as seen from the front side.

FIG. 13 is a plan view showing the state of the disk drive device during the transfer of the motor unit to the mechanical unit.

14 is a cross-sectional view of the disk drive device shown in FIG. 13 viewed from the front side.

FIG. 15 is a plan view showing a state of the disk drive device when the transfer of the motor unit to the mechanical unit is completed.

FIG. 16 is a plan view showing a state of the disk drive device when loading is completed.

FIG. 17 is a perspective view showing a configuration of a conventional disk drive device.

[Explanation of Codes] 100 ... Mechanical Unit, 102 ... Pickup, 200
… Motor mount, 201… Disk motor, 203…
Turntable, 300 ... Tray, 400 ... Cabinet, 500 ... Connector, 502, 504 ... Electrode plate, 50
3, 505 ... Bent portion, 531 ... Socket, 532, 53
4 ... contacts, 535 ... insulating protrusions.

Claims (1)

[Claims] 1. A cabinet and a tray for storing a disc to be reproduced, comprising:
A tray supported by the cabinet so as to be able to be taken in and out of the cabinet, a motor arranged in the tray, for driving the disk stored in the tray, and a power source arranged in the cabinet. A power supply circuit for generating electric power for driving the motor, a power supply line for electrically connecting the power supply circuit and the motor, and the tray housed in the cabinet. Switch means for switching on / off the connection of the power supply line so that drive power is supplied from the power supply circuit to the motor only when the motor is operated, and the motor is operated when the power supply line is cut off by the switch means. Disk drive having short-circuit means for short-circuiting the power supply line on the side communicating with Location.