JP3744394B2 - Disk unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk device for driving an optical disk such as a CD-R / RW or a DVD-R / RW in various computer systems.
[0002]
[Prior art]
In general, a personal computer (hereinafter referred to as a personal computer) can not be equipped with a disk device for driving an optical disk for recording and reproduction of information, and is built in the personal computer body or connected with a cable as an external device. I am doing so.
[0003]
The disk device incorporated in the personal computer main body is called a drawer system, and a drawer that accommodates an optical disk is projected out of the personal computer main body by a switch operation or a command from the personal computer so that the optical disk can be loaded. On the other hand, the upper lid opening / closing method that is externally attached with a cable has been widely adopted from music CD playback devices to personal computers because of its ease of use.
[0004]
By the way, in recent years, in such disk devices for personal computers, for example, the produced programs or video images and music are edited and the information is recorded on the optical disk. Since it is a series of information, the recording on the optical disc must be completed without interruption. However, when the mechanism unit for loading / unloading the optical disk is operated, there is a risk that the recording operation is forcibly terminated even during information recording.
[0005]
Therefore, an eject / lock mechanism has been proposed that prevents the optical disc from being loaded and unloaded by human operation while the recording operation is continued in both the drawer method and the upper lid opening / closing method. This means that when the optical disk can be inserted and removed, the microcomputer in the disk device judges this, and the eject / lock mechanism configured electrically and mechanically is driven based on the eject request. Thus, the artificial operation during recording is rejected to improve the safety of recording.
[0006]
As an eject / lock mechanism system that achieves this object, first, an electric motor system can be cited. This employs an electric motor as a power source as disclosed in Japanese Patent Application Laid-Open No. 2001-126460 “Recording medium mounting device”, and is mainly composed of a plurality of gears to transmit the driving force to the locking member. The electric motor is controlled by a control signal from a microcomputer in the disk device using the driving force transmission mechanism. In the electric motor system configured as described above, since the electric motor and the driving force transmission mechanism having a large number of parts are adopted, the manufacturing cost is increased, and when the power is down during operation, the recovery mechanism is required. . Furthermore, since a large number of parts such as an electric motor and a driving force transmission mechanism are arranged, a considerably large space is required.
[0007]
Next, as disclosed in Japanese Patent Laid-Open No. 9-44955 “Disc Device”, the suction-type solenoid system is arranged by using a suction-type solenoid as a power source and operating the lock lever by moving the plunger in the horizontal direction to eject it. As well as being in charge of rock. In the suction type solenoid system configured as described above, the efficiency of the suction force with respect to the volume of the suction type solenoid is low, and a large current is required during operation. Furthermore, since the weight of the movable part (iron core) is large, the impact resistance is low, and the lock may be released by an impact during transportation or the like.
[0008]
Further, as disclosed in Japanese Patent Application Laid-Open No. 11-339354 “Disc Device”, the self-holding solenoid system has a self-holding solenoid as a power source and a plurality of biased levers interlocking with the movable piece. It is operated to control ejection and locking, and can have a simple configuration as compared with the electric motor system and the suction type solenoid system, and the production cost can be reduced.
[0009]
[Problems to be solved by the invention]
As described above, the self-holding solenoid system is simple in each of the disk device eject / lock mechanism systems, and it is highly superior to the former two systems in terms of low cost, space saving and low power consumption. Have sex. However, recently, along with the reduction in size and weight of the personal computer main body, the allowable capacity in which the disk device can be mounted has become narrower. In particular, notebook computers are required to have a very flat form. Further, as the size of the upper lid open / close disc device becomes smaller, the volume in which the eject / lock mechanism is arranged becomes narrower, and the simplification of the mechanism is inevitable.
[0010]
Under such circumstances, it is difficult to adopt an electric motor type and suction type solenoid type eject / lock mechanism, and even when a self-holding type solenoid type is adopted, the configuration must be simplified as much as possible. .
[0011]
The present invention has been made to solve such a problem, and makes it possible to easily and easily mount an eject / lock mechanism by a self-holding solenoid system in a narrow space of a disk device. It is another object of the present invention to provide a highly reliable disk device with a low cost by reducing the components of the mechanism and thereby reducing the failure rate.
[0012]
[Means for Solving the Problems]
Therefore, the present invention solves the above problems by means described below. That is, according to the first aspect of the present invention, in the disk device that operates the eject / lock mechanism by applying a pulse current to the self-holding solenoid and opens the disk loading portion, the eject / lock mechanism includes: Locking means capable of moving between a lock position when closing the disk loading part and an ejection position when opening the disk loading part, and a magnetic attraction force that positions the locking means in the lock position in a steady state A self-holding solenoid that cancels the magnetic attraction force in an excited state, a biasing spring that generates a biasing force that biases the locking means toward the locking position, and biasing the locking means toward the ejection position And the urging force urged when the disc loading portion is closed is the self-holding solenoid. A release spring that is de-energized when the disc loading portion is released and has a smaller urging force than the urging spring, and is self-holding in a steady state. In the state where the lock means is positioned at the lock position by the magnetic attraction force of the mold solenoid, the disc loading portion is closed and the release spring is biased, the self-holding solenoid is excited to cancel the suction force. Then, the locking means is moved to the eject position by the urging force of the release spring, and then the locking means is moved to the lock position by the urging force of the urging spring when the disc loading portion is released and the release spring is de-energized. An eject / lock mechanism is provided.
[0013]
According to a second aspect of the present invention, in the first aspect of the invention, when the locking means is located at the eject position, the disc loading portion is opened by the biasing force of the release spring.
[0014]
According to a third aspect of the present invention, in the disk device in which the eject / lock mechanism is operated by applying a pulse current to the self-holding solenoid to open the disk loading portion, the movable piece of the self-holding solenoid A first slider having a release spring that is coupled and interlocked and that generates a biasing force in a direction in which the movable piece is pulled by pressing the locking claw of the upper lid is slidably contacted with the first slider. A second slider that is slidably held in a state and includes a latching claw that engages with the latching claw of the upper lid, and is constantly biased in the direction of the self-holding solenoid by a biasing spring. The pulse current is applied to the self-holding solenoid, and the movable piece of the self-holding solenoid is slid by the biasing force of the release spring, so that the first slider is attached. Slider slides, so that the closed state of the upper cover is released.
[0015]
According to the invention described in claim 4, in the invention described in claim 3, the urging force of the release spring is made smaller than the holding force of the movable piece of the self-holding solenoid.
[0016]
According to the fifth aspect of the present invention, in the disk device in which the eject / lock mechanism is operated by applying a pulse current to the self-holding solenoid and the disk loading portion is opened, the tip is moved by the action of the biasing spring. A lock lever that always contacts the movable piece of the self-holding solenoid while the rear end engages with a lock pin provided on the chassis so as to close the drawer, and the working end of the movable piece of the self-holding solenoid And a release spring that generates an urging force when the open end abuts against the chassis. A pulse current is applied to the self-holding solenoid, and the self-holding solenoid is applied by the urging force of the release spring. When the movable piece slides, the lock lever slides to release the closed state of the drawer.
[0017]
According to a sixth aspect of the invention, in the fifth aspect of the invention, the urging force of the release spring is made smaller than the holding force of the movable piece of the self-holding solenoid.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention shown in the drawings will be described in detail. FIG. 1 is a perspective view showing an upper lid opening / closing type (portable type) disk device D1 according to a first embodiment of the present invention, which is ready to be used by connecting a cable (not shown) to a personal computer body. The disk device D1 is mainly composed of a main body 1, a disk loading portion 2 for accommodating an optical disk (CD-R / RW, DVD-R / RW, etc.) as a recording medium formed on the main body, and an upper lid 3. A turntable 4 for rotating the optical disk and a pickup 5 that moves in the radial direction of the optical disk are disposed at the center position of the disk loading unit 2.
[0019]
The upper lid 3 is integrally formed with a locking claw 6 for closing the upper lid on the upper surface of the main body 1. A through-hole 7 that allows entry into is formed. An eject / lock mechanism is disposed inside the main body at a position relative to the through hole 7.
[0020]
FIGS. 2 and 3 are perspective views showing the eject / lock mechanism A of the first embodiment. The self-holding solenoid 8 as a driving source of the ejecting / locking mechanism A has a pair of yokes 8a and 8b at the tips of the exciting coils 8c and 8d. It is inserted and fixed from one end to almost the middle. Permanent magnets 8e are interposed at the ends of the yokes 8a and 8b, thereby forming a horseshoe-shaped magnetic circuit. On the other hand, the open ends of the movable piece 8f, which is a magnetic material, are slidably inserted into the other ends of the exciting coils 8c and 8d. For this reason, in the steady state, the movable piece 8f is held in a state where it is attracted to the magnetic force of the magnetic circuit formed by the permanent magnet 8e. And it is generated by the permanent magnet 8e by flowing a direct current so that a magnetic field opposite to the magnetic field generated by the permanent magnet 8e is generated from the terminal 8h, 8i at the end of the exciting coils 8c, 8d. The magnetic field is canceled and the restraint of the movable piece 8f is released. The self-holding solenoid 8 is fixed to the main body 1 with a screw 8j as shown in FIG.
[0021]
Next, reference numeral 9 denotes a first slider, the tip 9a of which is connected to the connecting hole 8g of the movable piece 8f of the self-holding solenoid 8, and is interlocked with the movable piece 8f. The working end 10a of the release spring 10 is locked to the rear end of the first slider 9, and the urging force is generated when the free end 10b is pressed by the locking claw 6 of the upper lid 3. ing. The urging force of the release spring 10 needs to be smaller than the force with which the self-holding solenoid 8 magnetically attracts the movable piece 8f. The main portion of the release spring 10 is fixed to the support by appropriate means such as screwing. By the way, guide holes 9b and 9c are formed in the main portion of the first slider 9, so that the second slider 11 described later can be linked or operated independently.
[0022]
Next, the second slider 11 is slidably disposed in close contact with the first slider 9, and a guide pin 11a and a top cover that are loosely fitted in the guide hole 9b of the first slider 9. A locking claw 11b that engages with the 3 locking claws 6 is provided, and guide holes 11c and 11d are formed. Then, one end of the biasing spring 12 is hooked to the hook 11e formed on the side portion, and the other end is hooked to the hook 13 formed on the main body 1, so that the second slider is always fixed. 11 is biased in the direction of the self-holding solenoid 8.
[0023]
As shown in FIG. 2, when the first and second sliders configured as described above are slidably attached to the screw receiving boss 16 formed on the main body 1 together with the printed circuit board 15 by the screws 14, the second sliders The guide pin 11a is loosely fitted in the guide hole 9b, and the guide pin 17 formed in the main body 1 is loosely fitted in the guide hole 11c of the second slider and the guide hole 9b of the first slider 9.
[0024]
In the state shown in FIG. 2 of the eject / lock mechanism A of the first embodiment configured as described above, that is, in the middle of closing the upper lid 3, the free end 10 b of the release spring 10 is pushed down by the locking claw 6. Since no biasing force is generated and the caster is in a state of being casted, the release spring 10 does not act on the first slider 9. On the other hand, since the second slider 11 is always pulled by the urging spring 12, it is pulled in the direction of the arrow X1 in the figure, and the first slider 9 is simultaneously moved in the direction of the arrow X1 by the guide pin 11a. It will be pulled.
[0025]
Next, when the closing of the upper lid 3 is continued, the top of the locking claw 6 presses the free end 10b of the release spring 10 and the inclined portions of the locking claw 6 and the locking claw 11b come into contact with each other. 2 slider 11 slides in the direction of arrow X2. At this time, the urging force of the release spring 10 is gradually generated. However, since the movable piece 8f is strongly adsorbed by the self-holding solenoid 8, the first slider 9 remains as it is. Only the second slider 11 slides.
[0026]
When the latching claw 6 is further pressed (in the direction of the arrow Y1), the engagement with the latching claw 11b is released at the inclined portion, and the jaws of the latching claws 6 and 11b are as shown in FIG. Engage and complete the locking of the top lid 3. At this time, the release spring 10 is pressed down to the maximum by the locking claw 6, and the biasing force tries to slide the first slider 9 in the direction of the arrow X2, and the locking claw 6 It works to push up (Y2 direction). At this time, the urging force of the release spring 10 in the direction of the arrow X2 is larger than the urging force of the urging spring 2 in the direction of the arrow X1.
[0027]
When ejecting the upper lid 3 in a state where the upper lid 3 is locked in this way, a pulse current transmitted based on an eject switch (not shown) disposed in the main body 1 or a command from the personal computer is used. Applied to the excitation coils 8c and 8d of the self-holding solenoid 8. Then, the magnetic field of the permanent magnet 8e generated in the yokes 8a and 8b is instantaneously canceled. As a result, the biasing force of the release spring 10 (greater than the biasing force of the biasing spring 12) acts, and the first slider 9 instantaneously slides in the direction of the arrow X2 as shown in FIG. At this time, since the guide pin 11a of the second slider 11 is engaged with the guide hole 9b, the second slider 11 also slides simultaneously. Thereby, the latching claw 6 moves in the direction of the arrow X2, and the engagement with the latching claw 11b is released. When this state is reached, the locking claw 6 is pushed up as shown in FIG. 4C by the remaining biasing force of the release spring 10 and the biasing force of a spring (not shown) that biases the upper lid 3 in the opening direction. The upper lid 3 can be opened. When the top lid 3 moves in the opening direction and the top of the locking claw 6 releases the pressing of the free end 10b of the release spring 10, the urging force stored in the release spring 10 is released, and thus the release is released. The urging action of the spring 10 against the first slider 9 is substantially eliminated. When the biasing force in the arrow X2 direction by the release spring 10 becomes smaller than the biasing force in the arrow X1 direction by the biasing spring 12, the second slider 11 slides in the arrow X1 direction by the biasing force. At this time, the first slider 9 and the movable piece 8f are simultaneously slid in the arrow X1 direction by being pressed by the second slider 11. As a result, the movable piece 8f is attracted and held by the self-holding solenoid and returns to the state shown in FIG.
[0028]
Next, a second embodiment in which the present invention is implemented in the drawer system will be described in detail. FIG. 5 is a perspective view showing the overall configuration of a disk device D2 incorporated in a notebook computer or the like. In FIG. 5, the drawer 20 is held by a chassis 21 so that its side is slidable by rails 22. It is configured to move in the front-rear direction. The drawer 20 includes a disk loading unit 23 that accommodates an optical disk, a disk drive mechanism such as a turntable 24 that is driven by a disk motor, and a disk that rotates by irradiating laser light and capturing the reflected light. A pickup 25 for reading data from the disk, and a transport mechanism 26 for moving the pickup 25 in the radial direction of the disk. Further, the front panel of the drawer 20 is provided with an eject switch 28 and an operation check light emitting unit 29, and a through hole 30 for forcibly ejecting is formed. The eject / lock mechanism B incorporated in the disk device D2 is incorporated in a narrow portion indicated by a broken line of the drawer 20 on the back surface of the through hole 30.
[0029]
Here, the configuration and operation process will be described in detail with reference to FIGS. 6 to 9 in a state where the eject / lock mechanism B of the second embodiment is viewed from the bottom surface of the drawer 20. Note that the self-holding solenoid employed in the second embodiment employs the same configuration as in the first embodiment, and is therefore given the same reference numeral, but will not be described in detail.
[0030]
The self-holding solenoid 8 in the figure supports one yoke 8b with a positioning pin, and the other yoke 8a is fixed to the substrate of the drawer 20 with screws 8j. The working end 32a of the release spring 32 supported on the base plate of the drawer 20 by the screw 31 is engaged with the connecting hole 8g of the movable piece 8f, and the other end 32b becomes a free end when the drawer 20 is opened, When closed, it is urged by the end 21a of the chassis 21.
[0031]
Reference numeral 33 denotes a lock lever, the central portion of which is supported by a screw 34 so as to be swingable. The tip 33a of the lock lever is always at the tip of the movable piece 8f of the self-holding solenoid 8 by the action of the biasing spring 35. Abut. At the rear end of the lock lever 33, there are formed a step portion 33b and an inclined portion 33c that engage with a lock pin 37 that is suspended and fixed from the chassis 21 inside.
[0032]
Reference numeral 38 denotes a pressing mechanism for the drawer 20, and when the drawer 20 is closed, the rear end portion 22 a abuts on the tip 39 a of the pressing lever 39, and the drawer 20 is further pushed into the space between the pressing lever 39 and the chassis 21. The drawer 20 is pressed in the direction in which the drawer 20 moves forward by the urging force of the coil spring 40 that is stretched around.
[0033]
When the drawer 20 provided with the eject / lock mechanism B of the second embodiment configured as described above is opened from the personal computer main body as shown in FIG. 6, the free end 32b of the release spring 32 is not subjected to any action. Therefore, no biasing force is generated in the release spring 32, and the release spring 32 is in a state of being casted.
[0034]
Next, when an optical disk is loaded in the disk loading unit 23 and the drawer 20 is accommodated in the chassis 21, the drawer 20 is moved backward by a manual operation. Then, when the drawer 20 moves backward, and the inclined portion 33c of the lock lever 33 comes into contact with the lock pin 37 as shown in FIG. 7, the lock lever 33 is gradually swung, and the drawer 20 is further moved backward to lock. The pin 37 engages with the step 33b of the lock lever 33, and the drawer 20 is locked as shown in FIG.
[0035]
At this time, the free end 32b of the release spring 32 comes into contact with the end 21a of the chassis 21, and a biasing force is generated. When this state is reached, the action end 32a of the release spring 32 acts in the direction of pulling out the movable piece 8f of the self-holding solenoid 8, but the urging force of the releasing spring 32 attracts the movable piece 8f by the magnetic force. Since the force is set smaller than the holding force, the movable piece 8f maintains the state of being held by the self-holding solenoid 8. At this time, the urging force by the release spring 32 acting in the direction of pulling out the movable piece 8 f is larger than the urging force by the urging spring 35 acting on the lock lever 33. Further, when the drawer 20 is locked in this way, the rear end portion 22a of the drawer 20 pushes up the tip 39a of the pressing lever 39 of the pressing mechanism 38. Thereby, the urging | biasing force to the direction which advances the drawer 20 with the coil spring 40 generate | occur | produces.
[0036]
In this way, when the drawer 20 is instructed to be ejected and the drawer 20 is opened, the exciting coil 8c of the self-holding solenoid 8 based on the operation of the eject switch 28 or the command from the personal computer. A pulse current is applied to 8d. Then, the magnetic fields generated by the exciting coils 8c and 8d cancel the magnetic fields of the yokes 8a and 8b, and the attracting force of the movable piece 8f instantaneously becomes equal to or less than the biasing force of the release spring 32. At this time, the urging force of the release spring 32 acts and the movable piece 8f slides in the pulling direction, and the tip of the movable piece 8f presses and rolls the tip 33a of the lock lever 33. The engagement between the step 33b and the lock pin 37 is released as shown in FIG. When this state is reached, the action of the pressing lever 39 by the urging force of the coil spring 40 is activated, the drawer 20 is pushed forward by a predetermined distance, and thereafter, the disk loading unit 23 is opened by manually moving the drawer 20 forward. Will be.
[0037]
When the drawer 20 is pushed forward and the pressing of the free end 32b of the release spring 32 by the end 21a of the chassis 21 is released, the urging force stored in the release spring 32 is released, and thus the release spring 32 is released. The urging action on the movable piece 8f due to is almost eliminated. When the urging force of the release spring 32 against the movable piece 8 f becomes smaller than the urging force of the urging spring 35 against the lock lever 33, the lock lever 33 is rotated counterclockwise by the urging force of the urging spring 35. . At this time, it is pressed by the lock lever 33, and the movable piece 8f also slides in the suction direction at the same time. As a result, the movable piece 8f is attracted and held by the self-holding solenoid and returns to the state shown in FIG.
[0038]
As described above, according to the second embodiment, since the mechanism for controlling the locking and ejection of the drawer can be configured with only one lock lever, it can be provided with a margin in a narrow part of the disk device. Since the configuration is simple, the cause of failure can be eliminated.
[0039]
【The invention's effect】
As described above in detail, according to the eject / lock mechanism of the present invention, since the release spring that generates the urging force in the state in which the disk is loaded is employed, the mechanism related to ejection can be largely omitted. Thereby, it can be set as a simple structure. Therefore, the number of parts can be reduced, the cost of the mechanism part can be reduced, and a disk device with a low probability of failure can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view of an upper lid opening / closing type disk device that is an object of the present invention.
FIG. 2 is a perspective view showing a first embodiment of the present invention.
FIG. 3 is an exploded perspective view of FIG. 2;
FIG. 4 is a process diagram for explaining the operation of the first embodiment of the present invention.
FIG. 5 is a perspective view of a drawer type disk device that is an object of the present invention.
FIG. 6 is a diagram showing a first step in a second embodiment of the present invention.
FIG. 7 is a diagram showing a second step in the second embodiment of the present invention.
FIG. 8 is a diagram showing a third step in the second embodiment of the present invention.
FIG. 9 is a diagram showing a fourth step in the second embodiment of the present invention.
[Explanation of symbols]
A ... Disk device (top lid opening / closing method)
DESCRIPTION OF SYMBOLS 1 ... Main body 2 ... Disc loading part 3 ... Top cover 4 ... Turntable 5 ... Pick-up 6 ... Locking claw 7 ... ... Through hole 8 ... Self-holding solenoid 9 ... First slider 10 ... Release spring 11 ... Second slider 12 ... Biasing spring 13 .... Hook B ... Disk device (drawer system)
20 ... Drawer 21 ... Chassis 22 ... Rail 23 ... Disc loading part 24 ... Turntable 25 ... Pick-up 28 ... Eject switch 32 ...・ Release spring 33 ・ ・ ・ ・ Lock lever 35 ・ ・ ・ ・ Biasing spring 36 ・ ・ ・ ・ Shield cover 37 ・ ・ ・ ・ Lock pin 38 ・ ・ ・ ・ Pressing mechanism

Claims (6)

In a disk device that operates an eject / lock mechanism by applying a pulse current to a self-holding solenoid and opens a disk loading unit,
The eject / lock mechanism is
Lock means capable of moving between a lock position when closing the disk loading section and an ejection position when opening the disk loading section;
A self-holding solenoid that emits a magnetic attraction force that positions the locking means in the locked position in a steady state and cancels the magnetic attraction force in an excited state;
A biasing spring that generates a biasing force that biases the locking means toward the lock position;
An urging force that urges the locking means toward the eject position is generated, and the urging force that is urged when the disk loading unit is closed is less than or equal to the magnetic attraction force of the self-holding solenoid. A release spring that becomes larger than the urging spring, and is de-energized when the disc loading portion is released and has a smaller urging force than the urging spring;
In a steady state, the lock means is positioned at the lock position by the magnetic adsorption force of the self-holding solenoid,
In a state where the disc loading portion is closed and the release spring is biased, when the self-holding solenoid is excited and the attracting force is canceled, the locking means is moved to the eject position by the biasing force of the release spring, Thereafter, there is provided an eject / lock mechanism configured such that when the disc loading section is opened and the release spring is de-energized, the locking means is moved to the lock position by the urging force of the urging spring. Disk unit.   2. The disk apparatus according to claim 1, wherein when the locking means is located at the eject position, the disk loading section is opened by the biasing force of the release spring. In a disk device that operates an eject / lock mechanism by applying a pulse current to a self-holding solenoid and opens a disk loading unit,
A first slider provided with a release spring that is coupled to and interlocked with the movable piece of the self-holding solenoid and that generates a biasing force in a direction in which the movable piece is pulled by pressing the locking claw of the upper lid; A locking claw that is slidably held in sliding contact with the first slider and that engages with the locking claw of the upper lid, and is constantly biased in the direction of the self-holding solenoid by a biasing spring. Second slider,
When a pulse current is applied to the self-holding solenoid and the movable piece of the self-holding solenoid slides by the biasing force of the release spring, the first slider slides with the second slider, and the upper cover A disk device comprising an eject / lock mechanism that releases the closed state of the disk.   4. The disk device according to claim 3, wherein the biasing force of the release spring is smaller than the holding force of the movable piece of the self-holding solenoid. In a disk device that operates an eject / lock mechanism by applying a pulse current to a self-holding solenoid and opens a disk loading unit,
A lock lever whose tip is always in contact with the movable piece of the self-holding solenoid by the action of the biasing spring, and whose rear end is engaged with a lock pin provided in the chassis so that the drawer is closed;
The working end is connected to the movable piece of the self-holding solenoid, while the release end is made up of a release spring that generates a biasing force by contacting the chassis,
A pulse current is applied to the self-holding solenoid, and the movable lever of the self-holding solenoid slides by the urging force of the release spring, so that the lock lever is lifted and the drawer closed state is released. A disk device characterized by that.   6. The disk device according to claim 5, wherein the biasing force of the release spring is smaller than the holding force of the movable piece of the self-holding solenoid.

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