JPS60163271A - Turntable device of disc player - Google Patents

Abstract

PURPOSE:To operate assuredly the titled device with simple constitution by providing the titled device with a center spindle to be ascended/descended in interlocking with the loading/unloading of a jacket. CONSTITUTION:Under the non-storage state of a disc, a driving slider 57 is moved as far as possible in the arrow D direction, a main shaft 53 of a turntable 52 is located on the lower position of inclination 571 and a turntable 52 is controlled so as to be located on the most descended lower dead point. At that time, the center spindle 54 is located on the upper dead point separated farthest from the upper surface of the turntable by the force of a spring 55. When the jacket 58 is inserted, the jacket 58 enters while descending a floating plate and abuts on the driving surface 541 of the center spindle 54. When the jacket 58 enters moreover, the driving surface 541 of the center spindle 54 is depressed, so that the jacket 58 is descended so that the loading course is constituted against the force of the spring 55 and the jacket 58 is stored up to a prescribed position.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a turntable device for a disc player suitable for, for example, a video disc system. [Technical Background of the Invention] Recently, video disc systems have been used. In the field of audio equipment, including Lutame K PCM, we aim to achieve high fidelity playback as much as possible.
A disk record playback device that makes full use of ()#Russ chord modulation) technology has been developed and is becoming popular. In such a disc record reproducing apparatus, each part is highly precisely controlled in order to reproduce information signals such as image signals digitally recorded on a disc with high fidelity and high density.

For example, in order to preserve the disc's impulsivity, the disc is inserted into the Jackera Tractor Direct Device that houses the disc so that it does not come into direct contact with human hands. The empty jacket is configured to be reproducibly attached to the table and to be taken out by pulling it out of the device.

That is, as shown in FIG. 1, a main shaft 1 is fixed to a substantially central portion of the turntable 9, and a lower end of the main shaft 1 is engaged with an inclined portion 3 for guiding a drive slider 20 for vertical driving.

This drive slider 3 is driven by the rotational force of a motor 4 that is linked to the movement of a jacket (not shown) into and out of a belt 5. The worm 6, the worm wheel 7, and the connecting rod 8 are converted into linear reciprocating motion to move in the directions of arrows (5) and (B), and as the inclined portion 3 moves, the main shaft 1 The turntable 9 is raised and lowered by moving up and down.

Further, the turntable 9 is connected to a Zori 11 driven by a drive motor 10 via a belt 12 so that rotational force can be transmitted thereto.

On the other hand, a shutter mechanism section for inserting a jacket is installed on one side of the chassis 13 in a loading path corresponding to the turntable 9.

This shutter mechanism section 14 has a shutter 1 that can be opened and closed freely.
5 is located at the lowest dead center of the turntable 9 (standby mode), the opening is activated, and when the turntable 9 is located at the top dead center (disc loading complete state), the shutter is locked. 16 and configured to be locked in the closed position.

Now, in such a configuration, in standby mode, the turntable 9 is located at the bottom dead center with the drive slider 2 moved the most in the direction of arrow (B), and the shutter mechanism 14 is in a state where it can be inserted (opened). . When a jacket (not shown) is inserted through the shutter mechanism 14f and disk loading is performed, the motor 4 is driven to a predetermined state and the drive slider 2 is moved in the direction of the arrow. Then, as the driving slider 2 moves, the inclined portion 3 presses the main shaft 1 and raises the turntable 9, so that the jacket disc (not shown) is mounted on the turntable 9 for playback. ,Here,
A turntable 9 is rotationally driven by a motor 10 to perform disc reproduction. At this time, the shutter 15 of the shutter mechanism section 14 is locked in the closed position by the shutter lock section 16 when the empty jacket that has completed disk loading is pulled out of the device, and when the empty jacket is inserted into the device again, the shutter lock section 16 is released.

FIG. 2 shows the mounting structure of the turntable 9, in which a boss 17 is provided on the upper surface of the turntable 9 at approximately the center thereof.
is provided, and the main shaft 1 is provided on the lower surface thereof. A bracket 18 is screwed onto the lower surface of the turntable 9 so as to surround the main shaft 1, and a pair of levers 20 and 21 are rotatably supported on this racket 18 via a pin 22. . Also, on the top of the turntable 9 is that? A center spindle 23 in which a spring 24 is inserted into a pair of legs 231 and 232, respectively, relative to the base 17.
In the fitted state, each claw part 22 of the leg part 221,222
3°224 is each cock part 201 of the lever 20.21
．． It is locked at 211.

Here, as shown in FIG. 3, the main shaft 1 of the turntable 9 is inserted into a main shaft housing 25 installed on the chassis 13 and engaged with the inclined portion 3 of the drive slider 2.

In this case, the levers 20.21 have their respective cock parts 20.
J, each tongue piece 202, 2 formed corresponding to 211
12 is a driving abutting surface portion 231 of the main shaft housing 23;
is brought into contact with. As a result, the levers 21 and 22 are moved up and down in conjunction with the rise and fall of the turntable 9, so that each of the tongues 202
．． 212 is guided by the abutting surface portion 251 and rotated to raise and lower the center spindle 23.

That is, in the standby mode, the turntable 9 is located at the bottom dead center as described above, so the lever 2
0.21 is rotated counterclockwise in the figure as shown in FIG. 3, and the center spindle 23 is controlled to its lowest position against the spring force of the spring 24. When the jacket 26 is inserted and the disk 27 is housed in the device, the turntable 9 has its main shaft 1 connected to the drive slider 2.
It is guided by the inclined part 3 of , and rises as shown in FIG. At this time, the center spindle 23 is raised together with the turntable 9 by the spring force of the spring 24 and is fitted into the center hole 22 of the disk 27, so that the entire disk 27 is attached to the turntable 9 in a reproducible manner.

[Problems with background technology]

By the way, in the turntable device described above, since the turntable 9 and the center spindle 23 are moved up and down in conjunction with the drive slider 2, the number of parts increases and the number of sliding and rotating friction segments increases. However, the controllability is poor, and there are various problems in ensuring reliable operation.

For example, when mounting the disc 27 on the turntable 9 for playback, the position of the disc 27 is corrected using the center spindle 23 of the turntable 9f, so there is a risk that the disc signal surface may slide against the turntable surface and be damaged. be.

In addition, when the disc 27 is removed from the turntable 9, the turntable 9 rotates due to inertia and descends to remove the disc 27, so that the disc 27 is separated from the center spindle 23 and exposed so as to interfere with unloading. (i.e., displacement).

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and provides an extremely good turntable device for a disc player that has a simple configuration, promotes reliable operation, and improves controllability. The purpose is to

[Summary of the invention]

In other words, this invention is a jacket in which the disc is stored)
a turntable that supports the disc in a reproducible manner and is provided corresponding to a jacket insertion slot for insertion;
a turntable elevating and lowering mechanism that drives the turntable up and down to attach and remove all the disks of the jacket; and a turntable that is provided on the turntable so as to be movable up and down in correspondence with the center hole of the disk, and that is linked to the movement of the jacket in and out. It is characterized by having a center spindle that is raised and lowered.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 5 shows a turntable device for a disc player according to the present invention.

That is, in the figure, 50 is a chassis in which a disk reproducing mechanism (not shown) and the like are installed, and a main shaft housing 5 for supporting the turntable is provided at a predetermined position of the chassis 50. A main shaft 53 of a turntable 52 shown in FIG. 6 is supported by the main shaft housing 51 so as to be rotatable and movable up and down. A spindle hole 531 is formed in the upper end surface of the main shaft 63, and a spherical engagement portion 532 is formed in the lower end thereof. In addition, the turntable 52
A pair of through holes 521 and 522 are formed in the vicinity of the main axis 53 so as to face each other. Furthermore, the above turntable 5
A center spindle 54 is provided on the upper surface of the device 2 so as to be movable up and down (up and down) via a spring 55 having a predetermined spring force. This center spindle 54 has a substantially conical drive surface 541 at its peripheral edge, and a drive surface 541 that is located at the center hole 54 of the disk 56.
61 (see FIG. 8), and has a pair of leg portions 54 on its lower surface that are inserted into the through holes 521 and 522.
2.543 and a spindle shaft 544 inserted into the spindle hole 53 are provided.

The foot parts 542 and 543 have claws 545 and 546 formed at their tips to prevent removal, respectively, and the spindle shaft 544 has a cut surface 647 for vertical movement guidance in the axial direction.
is formed.

Further, a drive slider 57 for driving the turntable up and down is provided on the lower surface of the main shaft housing 51 so as to be movable in the direction of arrow (C). This drive slider 57 is moved in the directions of arrows (C) and (D) by a drive mechanism (not shown) when the disk 56 (see FIG. 8) is housed in a predetermined state and the empty jacket 58 is pulled out. The main shaft 53 is moved in conjunction with the movement.
The turntable 52 is raised and lowered by a tilted part 571 for guiding up and down, which is provided correspondingly.

In addition, numeral 59 in the figure indicates a plurality of floating plates for supporting disks, which are provided so as to be movable up and down in correspondence with the turntable 52.
When the jacket 58 is inserted, these flotation plates 59 are lowered by the jacket 58, and the empty jacket 58
When the disk 56 (see FIG. 8) is pulled out and accommodated, it rises and supports the disk 56 (see FIG. 8) in a predetermined position.

Now, the turntable device configured as described above operates as described below.

-t- In other words, in the standby mode (disc non-accommodated state), the drive slider 57 is moved to the furthest direction (in the direction of the DJ force), and the main shaft 53 of the turntable 52 is located at the lower part of the inclined portion 571, and the turntable 52 is moved to the furthest position. Control to lowered bottom dead center.

At this time, the center spindle 54 takes the top dead center, which is farthest away from the upper surface of the turntable 52, due to the spring force of the spring 55.

When the jacket 58 is inserted as shown in FIG. 5, the jacket 58 first enters the floating board 59 while descending, and as shown in FIG.
4 pivot surface 54). Therefore, when the jacket 58 is further advanced, the center spindle 5
4 has a spring 55 because its driving surface 541 is pressed.
The jacket 58 is lowered against the spring force to form a loading path, and the jacket 58 is stored in a predetermined position.

Here, when the empty jacket 58 is pulled out as shown in FIG. 8, the disk 56 inside the jacket 58 is placed on the floating plate 59 together with the support plate 60. At this time, when the empty jacket 58 is separated, the center spindle 54 is raised again by the spring force of the spring 55.
The drive surface 541 corrects the position of the disk 56 while fitting it into the center hole 561.

Next, in the reproduction mode as shown in FIG. 52t - Raise the most. As a result,
The turntable 52 supports the disc 56 on its upper surface in a reproducible manner, and the disc reproducing mechanism (not shown) is driven here to reproduce the disc.

Further, when the disc 56 is to be removed after the disc playback is completed, as shown in FIG.
7 is moved in the direction of the arrow) and the turntable 5 is moved again.
2 is lowered. Then, with the center spindle 54 fitted into the center hole 561 of the disk 56,
The peripheral edge portion is placed on the floating plate 59. Then, when the empty jacket 58 is reinserted, the center spindle 54 operates in substantially the same manner as the loading operation to guide it to a predetermined position. At this time, the disk 56 on the floating plate 59 and the support plate 6o are stored in the empty jacket 58 in a predetermined state, and the disk removal is completed by pulling out the jacket 58 again.

In this way, in the above turntable device, the center spindle 54 is provided to be able to move up and down in conjunction with the insertion and removal of the jacket 58, and the position correction of the disk 56 is performed on the turntable 5.
It was configured to be performed while being separated from 2. According to this, an elevating mechanism for elevating and lowering the center spindle 54 is unnecessary, thereby effectively promoting the simplification of the structure and effectively promoting reliable operation.

Further, according to this, since the fitting operation between the disk 56 and the center spindle 54 is performed while the peripheral edge of the disk 56 is supported (that is, in a state separated from the turntable 52), the disk signal surface can be reliably protected. will be done.

Furthermore, according to this, since the center hole 561 of the disk 56 is always supported by the center spindle 54 while the peripheral edge of the disk 56 is supported by the floating plate 59, it is ensured that there is no damage when the disk 56 is separated from the turntable 52. In addition, it is possible to prevent deformation of the disk 56.

It goes without saying that the present invention is not limited to the above-mentioned embodiments, and that various modifications can be made without departing from the gist of the present invention. [Effects of the Invention] As detailed above, this invention According to, with a simple configuration,
It is also possible to provide a turntable device for a disc player that promotes reliable operation and improves controllability.

[Brief explanation of drawings]

1 to 4 are a perspective view, an exploded perspective view, and a sectional view showing a conventional turntable device for a disc player, respectively, and FIG. 5 is a sectional view showing a turntable device for a disc player according to an embodiment of the present invention. 6 is an exploded perspective view showing the main part of FIG. 5, and FIGS. 7 to 10 are sectional views showing the operating state of FIG. 5. 50... Chassis, 51... Spindle housing, 52
... Turntable, 53 ... Main shaft, 54 ... Center spindle, 55 ... Spring, 56 ...
Disc, 57... Drive slider, 58... Jacket, 59... Levitation plate, 60... Support plate.

Claims (1)

[Claims] A turntable that is provided in correspondence with a jacket insertion slot for inserting a jacket into which a disc is stored, and that supports a front disc in a playable manner, and a turntable that drives the turntable up and down to attach and detach the disc of the jacket. A disc player comprising: an elevating drive mechanism; and a center spindle that is provided on the turntable so as to be movable up and down in correspondence with the center hole of the disc, and that is moved up and down in conjunction with the insertion and removal of the jacket. turntable device.