JPH0550558U - Disk loading mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] A motor dedicated to disk loading is not required. [Structure] The swing gear 26 meshes with a drive gear 24 fixed to a shaft 22 of a disk motor 20. It can also mesh with the loading gear 27. Lock arm 3
0 keeps the swing gear 26 in mesh with the loading gear 27. When loading a disc, the disc motor 20 is rotated in the direction opposite to the disc rotation direction.
The swing gear 26 held by the lock arm 30 meshes with the loading gear 27, drives the slide plate 33 via the rack gear 28 and the rack 34, and loads the disc. When playing a disc, lock arm 3
When the restraint of the swing gear 26 by 0 is released and the disc motor 20 rotates, the link 25 rotates counterclockwise, and the swing gear 26 separates from the loading gear 27.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc loading mechanism for loading and unloading a disc or a disc cartridge in a disc device such as a CD player and a CD-ROM driver.

[0002]

[Prior Art]

 As shown in FIG. 7, the conventional disc loading mechanism includes a dedicated loading motor 2 different from the disc motor 1. When the loading motor 2 rotates, the loading motor 2 meshes with a worm 3 fixed to its output shaft. The worm gear 4 rotates, the rotation is transmitted to the gears 5 and 6, and the rack gear 7 rotates. A slide plate 9 integrally provided with a rack 8 that meshes with the rack gear 7 is mounted in the front-back direction of the disk device (arrow a or arrow). The mechanism was driven in the b direction). By moving the slide plate 9 in the front-rear direction of the disc device, a loading operation or an unloading action of a disc tray holding a disc or a cartridge holder holding a disc cartridge is performed. In FIG. 7, reference numeral 10 is a loading-out switch, and reference numeral 11 is a loading-in switch.

[0003]

[Problems to be solved by the device]

 As described above, the conventional disc loading mechanism is expensive because it uses the dedicated loading motor 1. Therefore, if possible, it is desirable to omit the loading motor 1 from the viewpoint of cost reduction.

The present invention has been made in view of the above circumstances, and an object thereof is to enable a loading / unloading operation without providing a dedicated loading motor, and to reduce the cost of the disk loading mechanism. To do.

[0005]

Means for Solving the Problems A disk loading mechanism of the present invention for solving the above problems includes a drive gear connected to a disk motor and a slide plate for moving the disk device in the front-rear direction to load or unload the disk. And a loading gear that drives the slide plate to move in the front-back direction of the disk device, and can move along the outer periphery of the drive gear while engaging with the drive gear. A swinging gear that moves to the loading gear side and meshes with the loading gear when rotated in the direction, and a meshing holding means that maintains the meshed state of the swinging gear and the loading gear during the disc loading operation. When the disc loading operation is completed, Characterized by comprising a releasing means for releasing the retention of the meshing state between Rodin Gugiya and.

[0006]

[Action]

 When unloading the disc, rotate the disc motor in the direction opposite to the disc rotation direction. When the disc motor is rotated in the direction opposite to the disc rotation direction, the swing gear moves along the outer periphery of the drive gear to the loading gear side while engaging with the drive gear, and engages with the loading gear. Therefore, the rotational force of the drive gear driven by the disc motor is transmitted to the loading gear via the swing gear, and drives the slide plate to unload the disc.

At the time of loading the disc, the disc motor is driven in the disc rotation direction. Further, during the disk loading operation, the meshing holding means holds the meshing state of the swing gear and the loading gear. As a result, when the disc motor is driven in the disc rotation direction, the rotational force of the drive gear driven by the disc motor is transmitted to the loading gear via the swing gear, and drives the slide plate to perform the disc loading operation. I do.

When the disk loading operation is completed, the holding means releases the meshing state of the swing gear and the loading gear. In this state, when the disc motor is driven to rotate in the disc rotation direction, the swing gear moves along the outer periphery of the drive gear in the direction opposite to the loading gear side and separates from the loading gear. Therefore, even when the disc motor rotates in the normal disc rotation direction during disc reproduction, the rotational force of the drive gear is not transmitted to the loading gear and no inconvenience occurs.

When the disc motor is rotated in the direction opposite to the disc rotation direction during disc unloading, the swing gear moves to the loading gear side and meshes with the loading gear. Therefore, the rotational force of the disc motor is transmitted to the loading gear via the swing gear, and the disc unloading operation can be performed.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. In these drawings, reference numeral 20 is a disk motor fixed to the mechanical chassis 21. A turntable 23 is attached to an upper portion of a shaft 22 of the disc motor 20, and a drive gear 24 and a link 25, which are drive sources for disc loading / unloading, are fixed to a lower portion of the disc motor shaft 22. A swing gear 26 that meshes with the drive gear 24 is attached to the link 25. It should be noted that the swing gear 26 and the drive gear 24 are kept in mesh with each other by a spring 47 spanned between their respective shafts. A loading gear 27 is provided near the drive gear 24 at a position where the swing gear 26 can be engaged with the drive gear 24, and a rack gear 28 that is engaged with the loading gear 27 is provided on the mechanical chassis 21.

A pin 29 is fixed to the tip of the link 25. A lock arm 30 which is substantially L-shaped and rotatable about its bent portion is provided so that it can be engaged with the pin 29 by a claw portion 30a at its tip. The lock arm 30 is urged by a spring 31 in the counterclockwise direction in FIG. Reference numeral 32 is a stopper for prohibiting the rotation of the link 25 beyond a certain limit.

Reference numeral 33 is a slide plate that moves in the front-rear direction of the disc device (vertical direction in FIGS. 1 to 4; left-right direction in FIGS. 5 to 6) to perform disc loading or disc unloading. A rack 34 that meshes with the rack gear 28 is fixed to the slide plate 33. Reference numeral 35 is a disk such as a CD (compact disk) or a CD-ROM, and reference numeral 36 is a disk cartridge containing the disk 35. The cartridge holder 37 holding the disc cartridge 36 is connected to the slide plate 33 via a pin 38, and when the slide plate 33 moves in the disc device front-rear direction along a fixed side plate (not shown), the cartridge holder 37 moves back and forth. It is designed to move and move up and down. Further, in FIGS. 5 and 6, reference numeral 40 is a gear for connecting the left and right slide plates 33 when viewed from the front of the disk device, and a rack provided on the lower surface near the rear end of the left and right slide plates 33. It engages with the portion 33a and is integrally connected to the left and right by connecting shafts 39. 1 to 4, reference numeral 41 is a loading out switch for detecting the forward movement of the bulging portion 34b integrated with the rack 34 to detect the completion of the disc unloading operation, and reference numeral 42 is the backward movement of the bulging portion 34b. This is a loading-in switch that detects the completion of the disc loading operation.

The next operation will be described. FIG. 1 shows the state at the time of loading start, in which the swing gear 26 meshes with the loading gear 27, the pin 29 at the tip of the link 25 is restrained by the claw portion 30a of the lock arm 30, and is rotated counterclockwise in FIG. It is supposed not to do. Therefore, when the disc motor 20 is rotated counterclockwise in FIG. 1 (this direction is the disc rotation direction), the swing gear 26 is clockwise, the loading gear 27 is counterclockwise, and the rack gear 28 is clockwise. The rack 34 and the slide plate 33 integrated with the rack 34 move toward the inside of the disk device (in the direction of arrow a in FIG. 1) as the cartridge holder 37 moves in accordance with the movement of the slide plate 33. After moving inward, the disk cartridge 36 is loaded (disk loading). In this case, when the drive gear 24 meshing with the swing gear 26 rotates counterclockwise in FIG. 1, a counterclockwise rotational force acts on the link 25 supporting the swing gear 26 as a reaction force. However, since the rotation is restricted by the lock arm 30, the engagement between the swing gear 26 and the loading gear 27 is maintained.

Due to the loading operation, the rack 34 moves inward (in the direction of arrow a) of the disk device, and the protrusion 34 a at the front end of the disk device hits the lock arm 30 against this reaction force of the spring 31. When rotated in the direction, the claw portion 30a is disengaged from the pin 29 at the tip of the link 25. Then, as described above, the force of rotating the link 25 in the counterclockwise direction acts on the link 25, so that the link 25 rotates in the counterclockwise direction and the swinging gear 26 separates from the loading gear 27 as shown in FIG. .. Further, when the bulging portion 34b of the rack 34 turns on the loading-in switch 42, the movement limit of the rack 34 is detected, and a signal of loading completion is obtained.

When the disc is reproduced in the loading completion state of FIG. 2, the disc motor 20 rotates counterclockwise as in the loading operation described above. Therefore, the swing gear 26 is kept in a free state at the position where the pin 29 at the tip of the link 25 hits the stopper 32, and therefore the rotation of the disc motor 20 at the time of disc reproduction is independent of the loading and unloading operations. Become.

When the disc reproduction is finished in the state of FIG. 2 and the disc unloading is performed again, the disc motor 20 is rotated clockwise. Then, a force is applied to the link 25 in the clockwise direction to rotate the link 25 in the clockwise direction, so that the swing gear 26 is again engaged with the loading gear 27 as shown in FIG. Therefore, the drive gear 24 driven by the disk motor 20 rotates clockwise, the swing gear 26 rotates counterclockwise, the loading gear 27 rotates clockwise, the rack gear 28 rotates counterclockwise, and the rack is rotated. At 34, the slide plate 33 integrated with this moves to the front of the disk device (in the direction of arrow b), and the cartridge holder 37 is pulled out. That is, disc unloading is performed. At this time, the pressing of the lock arm 30 by the protrusion 34a of the rack 34 is released by the movement of the rack 34 to the front side of the disk device, and the lock arm 30 is rotated counterclockwise by the force of the spring 31. The pin 29 at the tip of the link 25 is locked again as shown in FIG. Therefore, when the loading operation is subsequently performed, the loading operation can be performed in the same manner as described with reference to FIG.

The lock arm 30, the pin 29 a provided at the tip of the link 29, the spring 31 for urging the lock arm 30 in the counterclockwise direction, and the like keep the meshing state of the swing gear 26 and the loading gear 27. The mesh holding means 45 is configured. Further, the protrusion 34a provided at the front end of the rack 34 of the disk device constitutes a releasing means 46 for releasing the holding state of the meshing state between the swing gear 26 and the loading gear 27.

Although the rotation of the loading gear 27 is transmitted to the slide plate 33 side via the rack gear 28 in the embodiment, the transmission mechanism between the loading gear 27 and the slide plate 33 is not necessarily the one shown in the figure. Not limited to. In short, it suffices that the driving force of the loading gear 27 can drive the slide plate 33 directly or indirectly.

Further, in the embodiment, the L-shaped lock arm 30 is used as the mesh holding means for holding the meshing state of the swing gear 26 and the loading gear 27, but the invention is not limited to this. Further, although the protrusion 34a provided at the front end of the disk device of the rack 34 is used for releasing the lock arm 30, the present invention is not limited to this. For example, a solenoid, a miniature magnet or the like may be used due to a timing problem. Is also possible.

Further, in the embodiment, the loading and unloading of the disc cartridge is performed, but it is naturally applicable to a mechanism of loading and unloading the disc table for loading and unloading the disc. ..

[0021]

[Effect of the device]

 According to the present invention, since the loading and unloading is performed by the disc motor, a dedicated loading motor is not required and the cost can be reduced. Also, the number of parts is reduced, which is effective for downsizing the disk device.

[Brief description of drawings]

FIG. 1 is a rear view of a disc loading mechanism according to an embodiment of the present invention, showing a loading operation at the start.

FIG. 2 is a diagram when the loading operation is completed, and is also a diagram when the disc is reproduced.

FIG. 3 is a diagram at the start of the unloading operation.

FIG. 4 is a diagram when the unloading operation is completed.

FIG. 5 is a side view of the main part of the disc loading mechanism,
It is the one at the start of disk loading (corresponding to FIG. 1).

FIG. 6 is a front view of the main part of the disc loading mechanism,
It is in a loading completed state (corresponding to FIG. 2).

FIG. 7 is a rear view of a main part of a conventional disc loading mechanism.

[Explanation of symbols]

 20 disk motor 22 disk motor shaft 24 drive gear 25 link 26 swing gear 27 loading gear 28 rack gear 30 lock arm (mesh holding means) 30a claw portion 31 spring 32 stopper 33 slide plate 34 rack 34a protruding portion (release means)

Claims (1)

[Scope of utility model registration request] 1. A drive gear connected to a disc motor, a slide plate for moving the disc device in the front-back direction to load or unload the disc, and a loading gear for driving the slide plate to move the disc device in the front-rear direction. And while being engaged with the drive gear, it can move along the outer periphery of the drive gear, and when the disc motor is rotated in the direction opposite to the disc rotation direction, it moves to the loading gear side and the loading gear. The meshing swing gear, meshing holding means for holding the meshing state of the swing gear and the loading gear during the disk loading operation, and the meshing state of the swing gear and the loading gear when the disk loading operation is completed. And a release means for releasing the retention of Disk loading mechanism according to claim.