JPH07201116A - Optical disk loading mechanism - Google Patents

Abstract

PURPOSE:To attain a mechanism for inhibiting push-closing of a slide table at the time of playing and permitting the push-closing at the time of nonplaying. CONSTITUTION:A tray 3 to mount plural optical disks in freely rotatably provided on the slide table 2 capable of freely entering and leaving a case. A U-shaped rack 2a and a U-shaped guide groove 2b are provided on the back surface of the slide table 2. An oscillatory arm 4 is freely turnably provided on a chassis. A pulley 6 to be rotated round a rotary shaft of the oscillatory arm 4 and a pinion 7 to be driven by this pulley are provided on the oscillatory arm 4, and a shaft 7a integrated with the pinion 7 is engaged with the U-shaped guide groove 2b, and also the pinion 7 is meshed with the U-shaped rack 2a. Then, a gear 4a integrated with the oscillatory arm 4 is meshed with a rack 8a of a slider 8 for vertically moving a turntable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk loading mechanism of an optical disk reproducing apparatus, and more particularly to a slide table drive system in a so-called carousel type optical disk changer in which a rotary tray is provided on a slide table which can be inserted and removed from a housing. .

[0002]

2. Description of the Related Art Conventionally, there is known a so-called carousel type optical disc changer in which a rotary tray is provided on a slide table which can be inserted and removed from a housing. In such an optical disc changer, if the slide table is pushed by hand during the reproduction of the optical disc, the optical disc being reproduced or its rotation drive mechanism interferes with the optical disc on the rotary tray. Pushing must be prohibited.

For this reason, in the multi-disc player proposed in Japanese Patent Laid-Open No. 3-16061, a rotating rack which can rotate a certain amount is provided at both ends of a rack configured to drive the slide table, and The driven pinion is configured to mesh with the rotating rack when the rotating rack rotates by a certain amount with the slide table opened.

When the slide table is opened and is pushed by hand, the rotating rack is rotated so as to come out beyond the meshing pitch line with the pinion, so that the slide table can be closed by hand. You can't.

[0005]

The above-mentioned conventional optical disk loading mechanism has a problem that a driving mechanism for opening / closing the slide table and a driving mechanism for clamping the optical disk are separately required, which increases the manufacturing cost. .

Further, when the optical disk is not clamped, the optical disk on the rotary tray does not interfere with the clamp mechanism, but the slide table cannot be pushed by hand, which is inconvenient.

The present invention has been made in view of the above points, and an object of the present invention is to make the number of parts and the manufacturing cost by sharing the drive mechanism of the slide table and the drive mechanism of the optical disc clamp mechanism. It is an object of the present invention to provide a carousel-type optical disc loading mechanism with reduced number.

Another object of the present invention is to provide a carousel type optical disk loading mechanism which allows the slide table to be manually pushed in when the optical disk is not clamped.

[0009]

According to the optical disc loading mechanism of the present invention, a tray having a recess for mounting a plurality of optical discs is rotatably provided on a slide table which can be inserted into and removed from a housing. In an optical disk loading mechanism in which an optical disk on the tray is clamped and played when the turntable is raised in a housed state, a U-shaped rack is provided on the back surface of the slide table, and a fixed interval is maintained between the U-shaped rack. A U-shaped guide groove is provided, a swing arm is rotatably provided on the chassis, and a gear or pulley that rotates around the rotation axis of the swing arm and a pinion driven by the gear or pulley are provided on the swing arm. A protrusion provided on the swing arm is engaged with the U-shaped guide groove, and the pinion is attached to the U-shaped latch. And meshing, in which a gear formed integrally with the swing arm combined rack mesh with the slider for lifting said turntable.

Further, in the optical disc loading mechanism, the end of the U-shaped rack which is engaged with the pinion in a state where the turntable is raised is bent outward.

Further, in each of the optical disc loading mechanisms, the projection provided on the swing arm is an axis integral with the pinion.

[0012]

According to the optical disk loading mechanism of the present invention, the pinion provided on the swing arm meshes with the U-shaped rack of the slide table, and the slide table is moved by the rotation of the pinion, or the swing arm is moved. Can be rocked.

That is, if the straight portion of the U-shaped rack is set parallel to the moving direction of the slide table, the swing arm does not swing when the pinion meshes with the straight portion of the U-shaped rack, and slides. The table is sent.

If the central curved portion of the U-shaped rack is made to coincide with the moving envelope of the pitch circle of the pinion, the slide table does not move when the pinion and the pinion mesh with each other, and the swing arm does not move. Rock. When the pinion meshes with a portion of the U-shaped rack that does not match either the straight line or the moving envelope, both the slide table and the swing arm are moved.

When the swing arm swings, a slider provided with a rack that meshes with a gear integrally formed with the swing arm moves, and the turntable moves up and down. When the linear parts of the U-shaped rack and the pinions mesh with each other, the turntable is in a raised state or the turntable is in a lowered state, and the slide table is projected from the housing in the playing state and the non-playing state of the optical disk. Can be made. In this way, since the drive source of the slide table and the drive source of the clamp mechanism are common, the number of parts and the number of assembling steps are reduced.

In the optical disk loading mechanism of the present invention, the optical disk on the tray can be exchanged by projecting the slide table out of the housing while the optical disk is playing or not playing.

If the end of the U-shaped rack that engages with the pinion is bent outward when the turntable is raised, the pitch line of the rack engaging with the pinion corresponds to the moving direction of the slide table. When the turntable has a large angle and is pushed, a large pressure is applied to the pinion to lock it.

As described above, it is prohibited to push the slide table by hand during the performance of the optical disc, and the interference between the optical disc and the tray is prevented. On the other hand, if the optical disk is in a non-playing state, the slide table can be pushed in by hand, which is easy to use.

Further, if the projection engaging with the U-shaped guide groove of the slide table is formed as an integral shaft with the pinion, the friction coefficient between the guide groove and the projection becomes a dynamic friction coefficient.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk loading mechanism according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the outer appearance of an optical disk reproducing apparatus to which an optical disk loading mechanism according to an embodiment of the present invention is applied.

The slide table 2 shown in the figure is supported so as to be able to move in and out of the housing 1, and rotatably supports the tray 3. The tray 3 has a recess 3 for mounting an optical disk.
are provided, and are driven to rotate by a drive mechanism supported by the slide table 2. Tray 3
Is attached to the slide table 2, and the tray 3 is driven so as to stop at a predetermined rotation position.

FIG. 2 is an exploded perspective view showing the main part of the optical disk loading mechanism of the embodiment. Reference numeral 13 shown in the figure is a shaft that is erected on the chassis, and supports the swing arm 4 rotatably and further supports the pulley 6 rotatably. A fan gear 4a is integrally provided on the swing arm 4.

The rotation of the motor 5 fixed to the chassis is transmitted to the pulley 6 via a belt. The pinion 7 is rotatably supported by a shaft provided on the swing arm 4,
The rotation of the pulley 6 is transmitted through the gear train supported by the swing arm 4. A shaft 7a is formed integrally with the pinion 7.

As shown in FIGS. 3, 4 and 7, the shaft 7a of the pinion 7 engages with the U-shaped guide groove 2b of the slide table 2, and the pinion 7 meshes with the U-shaped rack 2a of the slide table 2. ing. The U-shaped guide groove 2 b and the U-shaped rack 2 a are provided on the back surface of the slide table 2. 3 and 4, the state where the tray 3 is removed is shown outside the broken line, and the state of the back surface of the slide table 2 is shown in a transparent manner.

The slider 8 shown in FIG. 2 is slidably supported on the chassis and is integrally formed with the rack 8.
The a is meshed with the fan gear 4a of the swing arm 4. The slider 8 has diagonal guide grooves 8b, 8 having a horizontal portion at the top and bottom.
b ... is formed.

The reproducing unit chassis 9 supports a turntable 10 and an optical pickup 11 fixed to a disk motor and its rotating shaft. The reproducing unit chassis 9 has projections 9a, 9a ... 8b, 8b ... Are engaged with vertical guide grooves of a chassis (not shown).

Above the turntable 10 coaxially,
The clamper 12 is disposed so as to be supported by the chassis.

Next, the operation of the optical disc loading mechanism having the above structure will be described. The swinging position of the swing arm 4 shown in FIG. 3 is in the initial position, and the slider 8 is moving to the rear side as viewed from the front surface of the panel.
At the same time, the turntable 10 is descending. Further, the slide table 2 is inserted in the housing 1.

In this state, the turntable 10 is located below the tray 3 as shown in FIG. 5, and the tray 3 can rotate with the optical disk placed in the recesses 3a, 3a. Thus, when the pinion 7 is rotated counterclockwise in FIG. 3 after moving an arbitrary optical disk above the turntable 10, the swing arm 4 rotates clockwise and the slider 8 moves forward. send.

Then, the reproducing unit chassis 9 is pushed up by the slider 8, and the turntable 10 lifts the optical disk on the tray 3 and clamps it together with the clamper 12 to be in an optical disk reproducing state.

When the pinion 7 is further rotated counterclockwise even after the optical disk is clamped, the slide table 2 is sent to the pinion 7 and protrudes from the housing 1. Figure 4
Shows the meshing state of the pinion 7 and the U-shaped rack 2a at that time. Further, FIG. 6 shows a positional relationship between the slide table 2 and the reproduction unit chassis 9 at that time.

As shown in FIG. 4 or 6, when the optical disk is clamped and the slide table 2 is in the open end state, the portion of the U-shaped rack 2a that engages with the pinion 7 is bent to the outside and engages. The large pitch line has a large angle with the slide table moving direction, and it does not move even if the slide table 2 is pushed by hand.

In the optical disc playing state, the slide table 2 can be projected and the tray 3 can be rotated to exchange the optical disc. However, the recess 3a of the tray on which the optical disc being played is placed is stored, and the recess 3a is stored. It is controlled so that it is not exposed to the outside.

When the slide table 2 is moved into the housing by a key operation after exchanging the optical disk, the tray is rotated so that the recess 3a of the tray on which the optical disk being played is placed is on the turntable 10. After that, the slide table 2 is moved. In this way, interference between the optical disc and its clamp device and the tray 3 during performance is prevented.

As described above, the structure is such that the slide table 2 cannot be pushed by hand during the performance, but it is not shown even if the slide table 2 is unlocked by pushing it by hand. The tray open detection switch is turned off and the motor 5 rotates so as to push out the slide table 2.

When the pinion 7 is rotated clockwise from the state shown in FIG. 3, the swinging arm 4 slightly rotates counterclockwise, and then the slide table 2 is sent to the pinion 7 and protrudes from the housing 1. . Thus, the optical disc can be replaced even when the optical disc is not clamped.

In this case, the turntable 10 is lowered, and the optical disc does not interfere with the turntable 10 or the disc motor rotation shaft, so that the slide table 2 can be manually pushed. When the slide table 2 moves a little and the tray open detection switch operates, the motor 5 rotates so as to draw the slide table 2 into the housing.

When the optical discs are played in an arbitrary order without the slide table 2 protruding from the housing, the non-playing state shown in FIG. 8 and the playing state shown in FIG. 9 (clamping state of the optical disc 14) are repeated. In this case, the pinion 7 only moves in the arc portion of the U-shaped rack 2a, and the slide table 2 does not move.

[0039]

According to the optical disk loading mechanism of the present invention, a mechanism is provided that prohibits the slide table from being manually pushed in during performance and permits it to be pushed in manually when not in performance. can do.

Since the slide table can be pushed in by hand when not playing, it is easy to use. Moreover, since the drive mechanism of the slide table and the drive source of the optical disc clamp mechanism are common, the manufacturing cost is reduced.

Further, when the slide table is opened during performance, since the meshing portion is bent at the open end of the rack, the slide table and the slider for raising and lowering the turntable move simultaneously, and the slide table is decelerated and stopped. As a result, the impact is reduced during the performance, so skipping is prevented. At this time, the slider also moves, but since the projection 9a of the reproducing unit chassis 9 is engaged with the horizontal portion of the guide groove 8b, the reproducing unit chassis 9 does not move.

Further, by engaging the U-shaped guide groove of the slide table with the shaft integral with the pinion, the coefficient of friction between the shaft and the guide groove becomes the dynamic coefficient of friction, which can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external appearance of an optical disk reproducing device to which an optical disk loading mechanism according to an embodiment of the present invention is applied.

FIG. 2 is an exploded perspective view showing a main part of the optical disc loading mechanism.

FIG. 3 is a plan view showing a part of a main part of the optical disc loading mechanism with omission or in perspective.

FIG. 4 is a plan view showing another state of the main part.

FIG. 5 is a side view showing the state of FIG. 3 of the optical disc loading mechanism.

FIG. 6 is a side view showing the state of FIG. 4 of the same optical disc loading mechanism.

FIG. 7 is a cross-sectional view showing a portion of the optical disc loading mechanism.

FIG. 8A is a plan view showing a slide table stored state and an optical disc non-playing state in the optical disc loading mechanism, and FIG. 8B is a side view showing the same state.

FIG. 9A is a plan view showing a slide table stored state and an optical disc playing state in the optical disc loading mechanism, and FIG. 9B is a side view showing the same state.

[Explanation of symbols]

1 housing 2 slide table, 2a U-shaped rack, 2b U
Character-shaped guide groove 3 Tray 3a Recess 4 Swing arm 4a Fan gear 5 Motor 6 Pulley 7 Pinion, 7a Shaft 8 Slider, 8a Rack, 8b Guide groove 9 Playback unit chassis, 9a Protrusion 10 Turntable 11 Optical pickup 12 Clamper 13 Axis 14 optical disk

Claims (3)

[Claims] 1. A turntable provided with a tray provided with a recess for mounting a plurality of optical disks on a slide table that can be freely inserted and removed from a housing, and the optical disk on the tray is a turntable when the slide table is in a housed state. In the optical disc loading mechanism that clamps and plays by raising the
A U-shaped rack and a U-shaped guide groove that is spaced apart from the U-shaped rack by a predetermined distance are provided, a swing arm is rotatably provided on the chassis, and a gear that rotates around a rotation axis of the swing arm or A pulley and a pinion driven by the pulley are provided on the swing arm, and the protrusion provided on the swing arm is attached to the U
An optical disk loading mechanism in which a pinion is engaged with a U-shaped rack and a gear integrally formed with the swing arm is engaged with a rack of a slider for moving up and down the turntable. 2. The optical disk loading mechanism according to claim 1, wherein an end of the U-shaped rack engaging with the pinion is bent outward when the turntable is raised. 3. The optical disk loading mechanism according to claim 1, wherein the projection provided on the swing arm is an axis integral with the pinion.