JP3011847B2 - Optical disk loading mechanism - Google Patents

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 rotating tray is provided on a slide table which can be freely inserted and removed from a housing. .

[0002]

2. Description of the Related Art A so-called carousel type optical disk changer in which a rotating tray is provided on a slide table which can freely enter and exit a housing has been known. In such an optical disc changer, if the slide table is pushed in by hand during the reproduction of the optical disc, the optical disc being reproduced and its rotation drive mechanism interfere with the optical disc on the rotating tray. Pushing must be prohibited.

For this purpose, in a multi-disc player proposed in Japanese Patent Application Laid-Open No. 3-16061, a rotating rack capable of rotating by a fixed amount is provided at both ends of a rack configured to drive a slide table. The driven pinion is configured to engage with the rotating rack when the rotating rack is rotated by a fixed amount with the slide table opened.

When the slide table is opened and the user tries to push it in 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. I cannot do it.

[0005]

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

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

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object the common use of a drive mechanism for a slide table and a drive mechanism for an optical disk clamp mechanism, thereby reducing the number of parts and manufacturing costs. To provide a carousel type optical disc loading mechanism with reduced number of optical discs.

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 present invention, there is provided an optical disk loading mechanism, wherein a tray provided with a recess for mounting a plurality of optical disks is rotatably provided on a slide table which can be moved in and out of a housing. In the optical disc loading mechanism, in which the turntable rises, the turntable raises the optical disc on the tray in the housed state, and a U-shaped rack is provided on the back surface of the slide table, and the U-shaped rack is kept at a constant distance. A U-shaped guide groove is provided, a swing arm is rotatably provided on the chassis, a gear or pulley rotating around a rotation axis of the swing arm and a pinion driven by the gear or pulley are provided on the swing arm, A projection provided on the swing arm is engaged with the U-shaped guide groove, and the pinion is connected to the U-shaped rack. 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, is bent outward with the turntable raised.

Further, in each of the optical disk loading mechanisms, the projection provided on the swing arm is formed as a shaft 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 rotating the pinion, or the swing arm is moved. Can be rocked.

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

If the center curved portion of the U-shaped rack is made to coincide with the movement envelope of the pitch circle of the pinion, the slide table does not move and the swing arm is moved when the pinion meshes with this portion. Rocks. 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 formed integrally with the swing arm is moved, and the turntable is raised and lowered. When each of the linear portions of the U-shaped rack and the pinion engage with each other, the turntable is in a raised state or a lowered state, and the slide table protrudes from the housing in a playing state and a non-playing state of the optical disc. Can be done. As described above, 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 assembly 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 from the housing while the optical disk is playing and 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 that engages with the pinion will be different from the moving direction of the slide table. When the turntable is pressed with a large angle, a large pressure is applied to the pinion and the pinion is locked.

As described above, during playing of the optical disk, pushing the slide table by hand is prohibited, and interference between the optical disk and the tray is prevented. On the other hand, if the optical disk is not in the playing state, the slide table can be pushed in by hand, so that it is easy to use.

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

[0020]

DETAILED 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 an 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 enter and exit from the housing 1, and supports the tray 3 so as to be rotatable. A recess 3 on which an optical disk is placed
are provided, and are rotationally driven by a driving mechanism supported by the slide table 2. Tray 3
A photo-interrupter for detecting the rotation position is mounted on 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 a main part of the optical disk loading mechanism of the embodiment. Reference numeral 13 shown in the figure denotes a shaft standing upright on the chassis, which rotatably supports the swing arm 4 and further rotatably supports the pulley 6. A fan gear 4a is provided integrally with the swing arm 4.

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

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 2b and the U-shaped rack 2a 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 break line, and the state of the back surface of the slide table 2 is seen through.

A slider 8 shown in FIG. 2 is slidably supported by a chassis, and a rack 8 formed integrally therewith.
a meshes with the fan gear 4 a of the swing arm 4. The slider 8 has oblique guide grooves 8b, 8 having horizontal portions at the top and bottom.
b ... are formed.

The reproduction unit chassis 9 supports a disk motor and a turntable 10 and an optical pickup 11 fixed to a rotating shaft of the disk motor. The reproduction unit chassis 9 is provided with projections 9a, 9a,. 8b, 8b... Are engaged with a vertical guide groove of a chassis (not shown).

Above the coaxial axis of the turntable 10,
A clamper 12 is arranged supported by the chassis.

Next, the operation of the optical disk loading mechanism having the above configuration will be described. The pivoting position of the swing arm 4 shown in FIG. 3 is the initial position, and the slider 8 has moved rearward as viewed from the front of the panel.
At the same time, the turntable 10 is descending. Further, the slide table 2 has entered the inside of the housing 1.

In this state, as shown in FIG. 5, the turntable 10 is located below the tray 3, and the tray 3 can be rotated while the optical disc is placed in the recesses 3a. When the pinion 7 is rotated counterclockwise in FIG. 3 after moving an arbitrary optical disk above the turntable 10 in this manner, 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, so that the optical disk is reproduced.

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. FIG.
Indicates a meshing state between the pinion 7 and the U-shaped rack 2a at that time. FIG. 6 shows the positional relationship between the slide table 2 and the reproduction unit chassis 9 at that time.

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

In the state of playing the optical disk, the slide table 2 can be protruded to rotate the tray 3 to change the optical disk. However, the recess 3a of the tray on which the playing optical disk is placed 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 key operation after the exchange of the optical disk, the tray is rotated so that the recess 3a of the tray on which the playing optical disk is placed comes on the turntable 10. Then, the slide table 2 is moved. In this way, interference between the tray 3 and the optical disk being played and its clamp device is prevented.

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

When the pinion 7 is rotated clockwise from the state shown in FIG. 3, the swing 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 disk can be replaced even when the optical disk is not clamped.

In this case, since the turntable 10 is lowered and the optical disk does not interfere with the turntable 10 or the rotating shaft of the disk motor, the slide table 2 can be pushed by hand. When the slide table 2 is slightly moved and the tray open detection switch is operated, the motor 5 rotates so as to pull the slide table 2 into the housing.

When playing the optical disk in an arbitrary order without projecting the slide table 2 from the housing, the non-playing state shown in FIG. 8 and the playing state (clamping state of the optical disk 14) shown in FIG. 9 are repeated. In this case, the pinion 7 moves only 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 for inhibiting the slide table from being pushed by hand during a performance and permitting the slide table to be pushed by hand during a performance is achieved by a mechanism. can do.

When the performance is not being performed, the slide table can be pushed by hand, so that it is easy to use. In addition, since the drive mechanism of the slide table and the drive source of the optical disk clamp mechanism are common, the manufacturing cost is reduced.

When the slide table is opened during the performance, the engaging portion is bent at the open end of the rack, so that the slide table and the slider for moving the turntable up and down move simultaneously, and the slide table is decelerated and stopped. As a result, the impact is reduced during the performance, so that sound skipping is prevented. At this time, the slider also moves, but the projection 9a of the reproduction unit chassis 9 is engaged with the horizontal portion of the guide groove 8b, so that the reproduction unit chassis 9 does not move.

Further, if a shaft integral with the pinion is engaged with the U-shaped guide groove of the slide table, the effect of reducing the friction coefficient between the shaft and the guide groove to the dynamic friction coefficient can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of an optical disk reproducing apparatus 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 omitted or seen through.

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 disk loading mechanism.

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

FIG. 7 is a sectional view showing a part of the optical disk loading mechanism.

FIG. 8A is a plan view showing a state where the slide table is stored and the optical disc is not playing 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 disk playing state in the optical disk loading mechanism, and FIG. 9B is a side view showing the same state.

[Explanation of symbols]

Reference Signs List 1 housing 2 slide table, 2a U-shaped rack, 2b U
-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 reproduction unit chassis, 9a projection 10 turntable 11 optical pickup 12 clamper 13 Axis 14 Optical disk

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 17/24

Claims (3)

(57) [Claims] 1. A tray provided with a recess for mounting a plurality of optical disks is rotatably provided on a slide table which can be moved in and out of a housing, and the optical disk on the tray is turned on when the slide table is stored. In an optical disc loading mechanism that performs clamping and playing by raising the
A U-shaped rack, a U-shaped guide groove provided at a predetermined distance from the U-shaped rack, a swing arm provided rotatably on a chassis, and a gear or a gear that rotates about a rotation axis of the swing arm. A pulley and a pinion driven by the pulley are provided on the swing arm.
An optical disk loading mechanism that engages with the U-shaped rack while engaging with the U-shaped rack while engaging a gear formed integrally with the swing arm with a slider rack that moves up and down the turntable. 2. The optical disc loading mechanism according to claim 1, wherein an end of said U-shaped rack which is in mesh with said pinion is bent outward when said turntable is raised. 3. The optical disk loading mechanism according to claim 1, wherein the projection provided on the swing arm is a shaft integrated with the pinion.