JPS607642A - Disc fitting device - Google Patents

Abstract

PURPOSE:To apply interchangeability to the charging of both discs by constituting a video disc assembly and a compact disc assembly by turntables and hubs respectively and charging a disc between both discs. CONSTITUTION:The carried video disc 14 is descended and put on a turntable 3. The video disc 14 is centered by a hub 4 concentrically fitted to the turntable 3 descended while being slided on a motor shaft 2 and fixed on the turntable 3 by a turn table 5. In the charging of the compact disc 15, the carried compact disc 15 is descended and centered by the hub 4. The point of a hub 6 concentrically fitted to the turntable 5 descended while being slided on the motor shaft 2 contacts with the compact disc 15 and presses the upper surface of the disc 15. Said constitution makes it possible to apply interchangeability to both discs.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a disc loading device for use in a player that serves both a video disc on which video is recorded and an audio compact disc.0 [Background of the Invention] Video disc A compact disc is a recording medium that can reproduce images or sounds based on a similar principle. That is, a laser beam is used to read the recording surface of a disk and reproduce images or sounds. However, because there are major differences in standards between video discs and compact discs in mechanical, optical, and electrical aspects, video disc players cannot play compact discs, and conversely, compact disc players cannot play video discs. Can not.

If playback is possible, most of the optical system, circuitry, etc. can be made common, so it can be made at a much lower cost than making video disc and compact disc players separately.

From this perspective, the present invention relates to a technology for making both video discs and compact discs playable on a common player, but is particularly concerned with video discs that differ in terms of expansion standards. 1 is a perspective view of a disc. FIG. 1 is a perspective view of a disc. In the same figure, Ro
is the hole diameter, ■ (1 is the recording surface start diameter (recording is normally done from the inner circumference of the disk surface toward the outer circumference, and the diameter is the starting position). When installed in a player, there is a diameter position suitable for clamping the disc to the turntable (referred to as the disc clamping surface diameter), and if this is R2, video discs and compact discs have standard diameters at these diameters. , as shown in Table 1 below.Table 1 Because of these differences in standard dimensions, the following problem occurs when one player attempts to play a Western disc.

First, when you try to play a compact disc on a video disc player, (1) The diameter of the turntable that supports the recording surface from below is larger than the diameter of the recording surface of the disc, so the laser beam that irradiates the recording surface from below hits the turntable. can't reach the recording surface because it's blocked by

(2) Since the hole diameter of the disk is different, it cannot be installed in the alignment mechanism.

On the other hand, if you try to play a video disc on a compact disc player, (1) the inner diameter of the video disc is larger than the compact disc turntable and it cannot be installed.

(2) Since the alignment device is small, the disk cannot fit into the alignment device.

(3) Since the turntable diameter cannot be made large enough,
Disc stability is poor.

Since the standard dimensions of video discs and compact discs are greatly different, there has been a problem in the past that if the same player is used, there is no compatibility in mounting the discs, and therefore it is impossible to create a low-cost, dual-purpose player. .

[Purpose of the invention]

The present invention has been made to solve the problems in the prior art as described above, and an object of the present invention is to provide a disc loading device that is compatible with video discs and compact discs in terms of loading. There is a particular thing.

[Summary of the invention]

In order to solve the above-mentioned problems, in the present invention, a turntable for video discs and a 7'-pu constitute one assembly, a turntable for compact discs and a hub constitute another assembly, and both assemblies are assembled. A disc is installed between the two discs, making the installation of both discs compatible.

[Embodiments of the invention]

The present invention will now be described in detail with reference to the drawings.

FIG. 2 is a cross-sectional view showing one embodiment of the present invention. In the same figure, 1 is a drive motor, 2 is a motor shaft, 3 is a first turntable fixed to the motor shaft 2, and 4 is a sectional view showing an embodiment of the present invention. A compact disc hub; 5 is a second turntable; 6 is a video disc hub; 7 and 8 are springs; 9 is a sloped portion of the hub 4; 10 is a sloped portion of the hub 6;
11 is a fitting hole for the motor shaft 2, 12 and 13 are E-rings, 16 is a table holder, 17 is a table holder, a spring for 16, 18 is a groove provided in the turntable 3, 19 is a ball bearing, 20 is a reading/reproducing part including a laser light source and the like.

FIG. 3 is a perspective view of one embodiment of the present invention◇That is,
The disk loading device as an embodiment of the present invention, which is shown in detail in the sectional view in FIG. 2, can be seen as a whole as shown in FIG. 3.

In FIG. 3, the present disc mounting device roughly speaking consists of a first assembly consisting of a turntable 3 and a compact disc hub 4 mounted concentrically on the motor shaft 2 side, and a first assembly mounted on the table holder 16 side. It can be said that the second assembly consists of a turntable 5 and a video disk hub 6 (hidden behind the turntable 5 in FIG. 3).

A video disc or compact disc is then inserted and mounted between the first assembly and the second assembly.

FIG. 4 is a perspective view of a player incorporating a disc loading device according to the present invention. In the figure, 14 is a video disc, 21 is a disc transport table, and 22 is a housing.

That is, a disk loading device as shown in FIG. 3 is built into the center of the housing 22 (on the other hand, the disk 14 conveyed by the disk conveyance table 21 is inserted between the first assembly and the second assembly which are just in the open state, as shown in FIG.
Next, when the space between the two assemblies is closed, the disc is installed.

Returning again to FIG. 2, its configuration will be explained.The turntable 3 is fixed to the shaft 2 of the motor 1 by caulking or the like.The external dimensions (diameter) of this turntable 3 are 35 mm.
The dimensions shall be set to exceed 50 yrm or less. Further, a hub 4 for a compact disc is inserted into the motor shaft 2 with a dimension that allows it to slide on the shaft 2, and a spring 7 is inserted between the turntable 3 and the hub 4 for a compact disc. Always push up the hub 4 and fix it in the groove provided on the motor shaft 2 with an E-ring 12 to prevent it from coming off.

Further, a turntable 5 is arranged on an extension of the motor shaft 2. The outer diameter of this turntable 5 is set from 55 to 851 m in order to improve the stability of the disc. The table 5 is provided with a fitting hole 11 for the motor shaft 2, and the row of cylinders constituting the fitting hole 11 is dimensioned so that the video disc hub 6 can be slid against the column. A spring 8 is inserted between the video disc hub 5 and the turntable 5, and the video disc hub 5 is kept pressed down and fixed with an E ring 13 to prevent removal. Further, the upper part of the turntable 5 and the table holder 160 are fixed via a nibball bearing 19. The table holder 16 is pulled downward by a table holder spring 17.

Next, in one embodiment of the present invention, the state in which the video disc 2 is loaded will be explained using FIG. 5.

First, in FIG. 2, a video disc 14 is conveyed between the motor shaft 2 and the video disc hub 6.
is stopped directly above the motor shaft i.

Next, the disk drive 4 is lowered and placed on the turn table 3. Let us now refer to the fifth item. Next, when the turntable 5 is lowered, the guide hole 11 of the turntable 5 and the motor shaft 2 fit together.

As the hub 6 descends further, the inclined portion 10 serving as the centering portion of the hub 6 comes into contact with the disk hole of the video disk 14, thereby performing a centering operation. A foil hub 6 that absorbs variations in the diameter of the disk hole slides on the shaft 2 of the turntable and is aligned by the force of a spring 8.

When the alignment is completed, the top surface of the video disc 14 is carved with the turntable 5. Since the external dimensions of the turncheep pushbutton 5 can be made sufficiently large, deformation of the disk can be prevented.

Next, the installation of the compact disc will be carried out using Figure 6. The compact de-r-suf 15 transported in the same manner as before was lowered and published on the slope 9, which is the area of interest to Zehab 4.
Make one heart. The tip of a hub 6 concentrically attached to a turntable 5 that slides down with respect to the motor shaft 2 comes into contact with the compact disc and presses the top surface of the disc.

After the compact disc 15 is aligned in this way, it is mounted on the turntable 3. turntable 3
The outer diameter of the compact disc 15 is more than 35 mm and less than 50 rst, and the starting diameter of the recording surface of the compact disc 15 is 50 mm. There is no obstruction.

Next, the playback state will be explained. The rotation of the motor shaft 2 causes the turntable 3 to rotate, and transmits the rotation to the disk. Also, since the disk is pressed against the turntable 3 via the turntable 5 and hub 6 by the force of the table holder spring 17, the turntables 3, 5 and hubs 4, 6
The whole body rotates under pressure on a bearing 19. Also, bearings have low frictional resistance, so they do not affect rotation.

〔Effect of the invention〕

As described in detail above, according to the disc loading device according to the present invention, the laser beam can be turned regardless of whether a video disc or a compact disc is loaded, despite the difference in shape depending on the disc standard. The table diameter can be increased to improve the safety of the disc without being obstructed by the table, and the disc can be mounted even if the hole diameter is different, making it compatible with both video discs and compact discs. It has the advantage of being capable.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a disk, FIG. 2 is a sectional view showing an embodiment of the present invention, FIG. 3 is a perspective view of an embodiment of the present invention, and FIG. 4 is a built-in disc mounting device according to the present invention. FIG. 5 is a sectional view showing a state in which a video disc is installed in one embodiment of the present invention, and FIG. 6 is a sectional view showing a state in which a compact disc is also installed. Code explanation 1... Motor, 2 River... Motor shaft, 3
...Turntable, 4...Compact disc hub, 5...Turntable, 6
...Video disc hub, 7,8...
・Spring, 9... Inclined part of hub 4, IO...
... Inclined portion of hub 6, 11... Fitting hole, 12.
13... E-ring, 14... Video disc, 15... Compact disc, 16.
...Table holder, 17...Spring, 1
8=...Groove, 19...Ball bearing ring, 20...Pickup section, 21...
・Transportation table, 22...Curved case agent Patent attorney average
Akio KiFigure 1Figure 3Figure 4

Claims (1)

[Claims] 1) A disk mounting device capable of selectively mounting first and second disks having mutually different hole diameters, the first disk being mounted concentrically on the shaft side of a disk drive motor. a first assembly comprising a turntable for the disc (hereinafter referred to as the first turntable) and an alignment mechanism (hereinafter referred to as the first mechanism of interest);
A turntable for a second disk (hereinafter referred to as the second turntable) and an alignment mechanism (hereinafter referred to as the second and a second assembly consisting of a centering mechanism), and when a first disk is installed between the first and second assemblies, the first disk is aligned by the first centering mechanism. the first disk
When the turntable and the protruding end of the second alignment mechanism are sandwiched, and the second disc is also attached, the second
A disk mounting device characterized in that the second disk aligned by the alignment mechanism is held between a second turntable and a first turntable.