JP3514123B2 - Tray lock mechanism in information recording / reproducing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a disk device for performing recording or reproduction by mounting a disk as a recording medium, and more particularly to a disk device on which a disk is mounted. The present invention relates to a lock mechanism for preventing a tray moving between a mounting position and a replacement position for exchanging a disk from moving at the mounting position. 2. Description of the Related Art In a disk drive on which a recording medium disk such as a CD-ROM is mounted, a disk is mounted between a disk mounting position inside a disk device housing and a disk replacement position outside the housing. A disk is mounted on the tray that is moved and pulled out, and the disk is mounted on the drawn-out tray, moved to the mounting position of the disk device, and the disk device is operated. A lock mechanism is provided for fixing the tray on which the disk is mounted at the mounting position while the disk device having the tray at the mounting position is in operation. The lock mechanism of this tray is provided with a lever with a hook rotatably on the tray to be slid, and hooks the lever with
The tray is locked at a mounting position by being locked to a pin provided on a chassis that supports the apparatus main body. [0003] The lock mechanism is released by turning a lever. As a mechanism for turning the lever, an example in which a suction-type solenoid is conventionally used is used. There are many. In the lock mechanism using the suction type solenoid, an iron core fixed to a rotating lever urged in a predetermined direction by a spring is driven by the suction force of the solenoid. In recent years, with the spread of notebook-type disk devices, there has been an increasing demand for smaller and thinner disk devices, and accordingly, solenoids have inevitably become smaller and thinner. It is becoming inevitable. However, if the size and thickness of the solenoid are reduced, the suction force will be insufficient, and this will have a problem in that the operation of the lock mechanism is affected with certainty. Further, since the iron core attached to the solenoid is heavy, when vibration or impact is applied to the device, there is a problem that the impact causes the lever to rotate against the spring and the hook of the lever to be disengaged. The present invention has been made in view of the above problems,
It is an object of the present invention to provide a tray locking mechanism in a disk device that has a simple mechanism, can be reduced in weight and size, and has high reliability in operation. According to a first aspect of the present invention, a recording medium is supported between a mounting position in a housing capable of recording or reproducing and a replacement position for exchanging a recording medium outside the housing. A lock mechanism for locking a movable tray at a mounting position in the housing, wherein the lock mechanism is attached to a shaft fixed to the tray.
A claw that is pivotally mounted and engages a lock pin provided in the housing;
Part, and the claw part is engaged with the lock pin by a spring.
Arm biased in the direction of
And a lever having an end coupled to the plunger.
A lock lever, and a lock lever drive mechanism for releasing the engagement of the lock lever with a lock pin. The lock lever drive mechanism switches a current direction to supply a current, and the coil The solenoid includes a plunger movably supported in the central cavity and connected to the lever, and a permanent magnet fixed to an end of the central cavity of the solenoid, and the arm is provided with a tray.
The arm is locked when moving from the loading position to the loading position.
When driven to rotate relative to the lever.
Dynamic and, said lever when releasing the lock of the tray, the plunger is driven by a solenoid, linked lever plunger, the claw portion and the lock pin and rotates integrally with the arm engagement The solenoid is driven to generate a magnetic field in a direction to increase a magnetic field generated by the permanent magnet and a magnetic field in a direction to cancel the magnetic field to drive the plunger, thereby rotating the lock lever. This is a configuration characterized in that: [0006] [0007] lock device according to claim 1, in combination solenoid and the permanent magnet can with scores flow a current bidirectionally, the solenoid counteracts the direction of the magnetic field to enhance the magnetic field generated from the permanent magnet The magnetic field is generated by switching the direction of the current in the direction. Thus, the magnetic field acting on the plunger connected to the lock lever is changed, and the lock lever is rotated to release the engagement of the lock lever with the lock pin. As a result, the reliability of the operation of the lock mechanism can be increased, and a small-sized solenoid can be used, so that the size and thickness of the recording medium mounting device can be reduced. Next, an embodiment of the present invention will be described with reference to the drawings. Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a state where a tray of a disk device to which an embodiment of a tray locking mechanism according to the present invention is applied is pulled out, and FIG. 2 is a state where the tray is accommodated in a mounting position in a housing of the disk device. FIG. The disk device 11 is used as an external storage device of an information processing device (not shown) such as a personal computer.
It has a disk mounting device 12 to which a CD-ROM, PD disk cartridge, DVD disk cartridge, or the like is mounted. The mounting device 12 includes a tray 14 pulled out of the housing 13 of the disk device 11, and a holder 15 into which a disk serving as a recording medium is inserted. The tray 14 is slidably mounted on the casing 13 in the AB direction. The tray 14 is pulled out in the A direction to exchange a disk, or stored in the casing 13 for recording. Or, it is moved to a playable mounting position.
On the upper surface of the tray 14, a turntable 18 on which a disk is mounted, a disk motor 19 for driving the turntable 18 to rotate, and a pickup 20 for optically reading information recorded on the disk are provided. On one side of the tray 14, there is provided a lock mechanism 30 for preventing the tray from moving when the tray 14 moves to the mounting position in the housing. The lock mechanism 30 includes a lock lever 50 that engages with a lock pin 35 provided on the housing 14 and a latching solenoid 60 that drives the lock lever 35, as described later. At the rear end of the tray 14, an ejection pressing member (not shown) made of a spring for urging the tray 14 in the direction A is provided. When the lock by the lock mechanism 30 is released, the ejection is performed. The pressing member for the tray 14
Move in the A direction. Referring to FIGS. 3 to 5, the lock mechanism 30 will be described.
Will be described in detail. FIG. 3 is an overall configuration diagram of the lock mechanism. FIG. 4 is an exploded configuration diagram of the lock lever. FIG. 5 is an explanatory diagram of the latching solenoid. The lock mechanism 30 includes a lock lever 50 and a latching solenoid 60 for rotating the lock lever 50 to a lock position or an unlock position. The lock lever 50 has at its tip a claw 51a which engages with a lock pin 35 provided on the housing 13.
Bearing hole 51 into which shaft 53 erected on tray 14 is inserted
b, an arm 51 having an engagement groove 51c formed therein, and a lever 5 connected to a plunger of a latching solenoid 60.
2 and more. The claw 51a of the arm 51 has a hook 51d and an outer inclined surface 51e. Lever 52
Has a shaft hole 52a, an engagement pin 52b, projections 52c and 52d for locking a spring, and a pin 52e for fixing to the plunger 63. The bearing hole 51a of the arm 51 and the shaft hole 52a of the lever 52 are pivotally connected to a shaft 53 erected on the tray 3, and the lever 52 is pivotally connected to the head of the plunger 63 via the pin 52c. . Also,
The pin 52b of the lever 52 enters the engaging groove 51c of the arm 51 and engages with it. As shown in FIG. 3, a first spring 55 is attached to a shaft 53 to which the arm 51 is attached, and one end 55a of the spring 55 is connected to the arm 51.
, And the other end 55b is
Locked to 2. Thereby, the arm 51 is connected to the lever 52
Is biased in the direction of arrow C to be rotatably supported. The arm 51 is configured such that the pin 52b of the lever 52 abuts on the engagement groove 51c of the arm 51 so as to maintain the posture shown in the figure. A second spring 56 is attached to the shaft 53, and one end 56 a of the second spring 56 is locked by a pin 57 erected from the bottom surface of the tray 3, and the other end 56 a
b is locked by a convex portion 52c formed on the lever 52.
As a result, the lever 52 is urged in the direction of arrow D by the spring 56 with respect to the tray 3 so as to be rotatable. FIG. 5 shows a latching solenoid 60,
(A) is a figure which shows the whole structure, (B) shows a plunger, (C) shows a yoke. The latching solenoid 60 is
A coil 61 supported by a yoke 62, a plunger 63 formed of an iron core that is a magnetic material inserted into a central hollow portion of the coil, and a coil located at an end of the hollow portion of the coil and supported by the yoke It is constituted by a magnet (permanent magnet) 64. The plunger 63 is, as shown in FIG.
It is formed of an elongated iron plate having a hook 63a for connecting a pin 52c formed on the lever 52 of the lock lever 50 to the head. The yoke 62 is formed of a plate-shaped member having a U-shaped cross section including an upper surface 62a, a lower surface 62b, and a side surface 62c, as shown in FIG. 4C, and supports the solenoid 61 and the magnet 64. A hole 62d for guiding the plunger 63 is formed on the upper surface 62a of the yoke 62. The magnet 64 is a magnet using a rare earth element having a large attractive force. The solenoid 61 is supplied from a power source (not shown) while changing the direction of current flow according to a switch operation. When a current flows in one direction, a magnetic field is generated in the same direction as the line of magnetic force generated from the magnet 64, and when a current flows in the opposite direction, a magnetic field is generated in a direction to cancel the magnetic field from the magnet 64. ing. The energization of the solenoid 61 is controlled by an operation switch (not shown) provided on a bezel on the front of the tray 14. In the lock mechanism having the above-described configuration, when the solenoid 61 of the latching solenoid 60 is not energized, the arm 51 and the lever 52 overcome the attractive force of the magnet 64 acting on the plunger 63, and the springs 55 and 56 As a result, the plunger 63 is held in a raised state as shown in FIG. Next, the operation of the lock mechanism 30 of this embodiment will be described with reference to FIG. (1) First, in the loading start state shown in (A), the coil 61 of the latch solenoid 60 is not energized. Therefore, the arm 5 of the lock lever 50
1 and the lever 52 are the plunger 6 of the magnet 64.
Spring 55 and spring 56
Maintain the state shown in FIG. (2) When the tray 14 moves forward in the direction of the housing 13 (in the direction of arrow B) and the inclined surface 51d at the tip of the arm 51 comes into contact with the lock pin 35 (FIG. B), the arm 51 is spring-loaded. The claw 51a rotates over the lock pin 38 around the shaft 53 in the direction of arrow E against the elasticity of the shaft 55. At this time, the engaging pin 52b of the lever 52
Moves in the engagement groove 51c of the arm 51. (3) When the claw 51a gets over the lock pin 38, the arm 51 rotates again to its original state due to the elasticity of the spring 55, and the hook 51e engages with the lock pin 38 to be locked. Figure C). Thereby, the tray 3
Will be prevented from being pulled out of the housing. (4) When the tray 14 is ejected, that is, when the locked state is released, the operation switch provided on the front bezel of the tray 14 is pressed. When the operation switch is pressed, the solenoid 61 of the latch solenoid 60 is magnetized. A current in the direction in which the magnetic field lines in the same direction as the magnetic field lines generated by the current 64 flows for a predetermined time (about 10 msec). Then, by the excitation of the solenoid 61, the magnetic field in the same direction as the magnetic field formed by the magnet 64 is strengthened. The arm 51 rotates in the direction of arrow E with the rotation of the lever 52, and the claw portion 51a
The engagement between the hook 51e and the lock pin 38 is released (FIG. D). In this state, the plunger 63 sucked into the solenoid 61 is held in that state by the magnet 64. When the engagement between the claw portion 51a and the lock pin 38 is released, the tray 14 automatically moves in the direction A, that is, in the pulling-out direction, by a pressing mechanism using an elastic body. (5) When the engagement between the claw portion 51a and the lock pin 38 is released and the tray 3 is pulled out, a current in the reverse direction flows through the solenoid 61 for a predetermined time (about 10 msec), and the solenoid 61 is excited. Then, a magnetic field in a direction to cancel the magnetic field generated by the magnet 64 is formed in the solenoid 61. As a result, the suction force for pulling in the plunger 63 is canceled, and the elastic force of the spring 56 wins and returns to the original state again (FIG. E). This completes the ejection. As described above, the lock mechanism according to the present embodiment includes the lock lever 50 supported via a spring.
Since the plunger 63 is driven and engaged or disengaged by using a solenoid having a magnet (permanent magnet) therein and capable of generating a magnetic field in both directions, a sufficient attractive force can be obtained even if the solenoid is downsized. Can be obtained, and the entire apparatus can be downsized. Further, the iron core constituting the plunger can be lightened, and the spring load can be increased. As a result, unlocking due to vibration or impact is prevented. As described above, according to the present invention, the lock mechanism is provided with a lock lever 50 supported via a spring.
Since the plunger 63 is driven and engaged or disengaged by using a solenoid having a magnet (permanent magnet) therein and capable of generating a magnetic field in both directions, a sufficient attractive force can be obtained even if the solenoid is downsized. Can be obtained, and the entire apparatus can be downsized. In addition, the iron core constituting the plunger can be lightened, and the spring load can be increased. As a result, the lock is prevented from being unlocked due to vibration or impact, and it is ensured at the tray mounting position. Locking and unlocking can be performed, and the reliability as a disk device is also increased.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a state where a tray of a disk device to which an embodiment of a tray locking mechanism according to the present invention is applied is pulled out. FIG. 2 is a diagram illustrating a state where a tray is accommodated in a mounting position in a housing of a disk device. FIG. 3 is an overall configuration diagram of a lock mechanism. FIG. 4 is an exploded configuration diagram of a lock lever. FIG. 5 is an explanatory diagram of a latching solenoid. FIG. 6 is an explanatory diagram of an operation of a lock mechanism. DESCRIPTION OF SYMBOLS 11 Disk device 12 Mounting device 13 Case 14 Tray 15 Holder 5 18 Turntable 19 Disk motor 20 Pickup 30 Lock mechanism 35 Lock pin 50 Lock lever 51 Arm 52 Lever 60 Latching solenoid 61 Solenoid 62 Yoke 63 Plunger 64 magnet

Claims (1)

(57) [Claims] 1. A recording medium is supported and can be recorded or reproduced.
Exchange between the mounting position in the housing and the recording medium outside the housing
The tray that can be moved to and from the replacement position
A lock mechanism for locking in the position,Pivotally mounted on a shaft fixed to the tray and provided in the housing
A claw for engaging with the lock pin;
Are biased in a direction to engage the lock pin.
And the shaft is pivotally connected to the shaft and the end is connected to the plunger.
A locking lever having a set lever; and The lock leverWith a lock pinLock to disengage
Equipped with a clever drive mechanism, The lock lever drive mechanism, A solenoid that switches the current direction and is supplied with current, Movably supported in the central cavity of the coil,Said
On the barA plunger made of a connected magnetic material, Permanent magnet fixed to the end of the central cavity of the solenoid
With stones,The arm moves the tray from the loading position to the loading position.
When the arm is rotated by the lock pin when
Rotate relatively to the lever, When releasing the lock of the tray, the lever
Connected to the plunger when the plunger is driven by the
The lever is rotated integrally with the arm and
The lock pin is disengaged, Increase the magnetic field generated by the permanent magnet in the solenoid
To generate a magnetic field in the direction of
Drive the plunger, thereby causing the lock lever
A lock mechanism characterized in that the lock mechanism is rotated.