JPS60237673A - Disk loading device - Google Patents

Abstract

PURPOSE:To load a video disk and a compact disk with compatibility by loading disks between a turntable used in common, and an assembly formed integrally of two disk aligning mechanisms and an assembly formed of two clampers in one body. CONSTITUTION:When the video disk 14 is loaded, the disk 14 is stopped right above a motor shaft 2, and lowered and mounted on the bevel 10 of a video disk hub 6. Then, a clamper 5 is lowered to fit the motor shaft 2 in a fitting hole 11 and further lowered to bring the clamper 5 into contact with the disk 14, and the disk 14 while aligned on the bevel 10 is lowered and clamped by the clamper 5. When the compact disk 15 is loaded, on the other hand, the disk is placed and centered on a bevel part 9 as the aligning part of a compact disk hub 4, and the disk 15 is pressed with a clamper from above and clamped.

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 video discs on which video is recorded and audio compact discs.

[Background of the invention]

Video discs and compact discs are recording media that can reproduce images or sounds based on similar principles. That is, a laser beam is used to read the recording surface of a disk and reproduce images or sounds. However, video discs and compact discs have mechanical, optical,
Due to the large electrical differences, video disc players cannot play compact discs, and conversely, compact disc players cannot play video discs.

If playback is possible, most of the optical system and circuitry can be shared, making it possible to make video disc and compact disc players at a much lower cost than making separate players.

From this viewpoint, the present invention relates to a technology for making both video discs and compact discs playable on a common player, and in particular, the present invention relates to a technology for making video discs and compact discs playable on a common player. The present invention relates to a disc mounting device that can also be used to mount a compact disc.

FIG. 1 is a perspective view of the disk. In the same figure, Ro
is the hole diameter, and R1 is the recording surface start diameter (recording is normally done from the inner circumference of the disk toward the outer circumference, and the diameter is the starting position). In addition, when a disc is installed in a player, there is a radial position suitable for clamping the disc to the turntable (referred to as the disc clamp surface diameter), and if this is R2, then for video discs and compact discs, these radial positions are suitable for clamping the disc to the turntable. According to the standard, the diameters differ as shown in Table 1 below.

Table 1 Because of the size difference in the standard, the following problem occurs when one player is used to play both discs.

First, when you try to play a compact disc on a video disc player, (11) 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. It is blocked and cannot reach the recording surface.

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

On the other hand, if you try to play a video disc on a compact disc player, +1) The hole diameter of the video disc is larger than the turntable of the compact disc, making it impossible to mount it.

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

(3) Since the turntable diameter cannot be made sufficiently large, the stability of the disk supported by the turntable is poor.

As described above, 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, the disc devices are not compatible, and therefore a low-cost dual-purpose player cannot be realized.

[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 problems, the present invention provides a commonly used turntable, a first disc alignment mechanism, and a second disc alignment mechanism.
A first assembly is constructed by integrating the disc alignment mechanism of the disc, and a second assembly is constructed by integrating the first disc clamper and the second disc clamper, and the disc is disposed between the two assemblies. This makes 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 sectional view showing one embodiment of the present invention.

In the figure, 1 is a drive motor, 2 is a motor shaft, 3 is a turntable fixed to the motor shaft 2, 4 is a compact disc hub, 5 is a video disc clamper, 6 is a video disc hub, and 7 Hane,
8 is a clamper for compact discs, 9 is an inclined portion forming an alignment portion of the hub 4, 10 is an inclined portion forming an alignment portion of the hub 6,
11 is a fitting hole for the motor shaft 2, 12 is an E-ring for preventing removal, 13 is an escape groove, 6 is a table holder, 17
is the spring for the table holder, 19 is the pole ring, 2
0 is a pickup unit for reading and reproducing 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 cross-sectional view in FIG. 2, is as shown in FIG. 3 when viewed as a whole.

In FIG. 3, the present disc mounting device includes, roughly speaking, a first assembly consisting of a turntable 3, a compact disc hub 4, and a video disc hub 6, which are concentrically attached to the motor shaft 2 side; It can be said that it is constituted by a second assembly consisting of the clamper 5 and the clamper 8 attached to the table holder 16 side.

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, the central part of the housing 22 has a built-in disk loading device as shown in FIG. When the disc is inserted between the first assembly and the second assembly which are in the open state, and then the space between the two assemblies is closed, the disc is installed.

Returning to FIG. 2 again, the 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 set to exceed 35 ts and to be 50 m or less. Also motor shaft 2
A hub body including a compact disc hub 4 is inserted into the shaft 2 with a size that allows it to slide.

The hub body has a recess 1lII3 formed on its outer periphery following the slope 9 forming the centering part of the hub 4, and a video disc hub 6 is further formed on its outer periphery.
The slope 10 forming the centering part continues and ends there.

Turntable 3 and the above hub body (4, 9, 6° 10.1
A spring 7 is interposed between 3) and the hub body is always pushed up by the elasticity of this spring 7, and an E-ring 1 is used to prevent the hub body from being pulled out from the shaft 2.
2 is attached to the shaft 2. This hub body and turntable 3 constitute a first assembly.

Furthermore, a second assembly integrally provided with a video disc clamper 5 and a compact disc clamper 8 is arranged on an extension of the motor shaft 2. The outer diameter of the clamper 5 is set within a range of 55 inches to 85N in order to improve the stability of the video disc when the video disc is clamped between the clamper 5 and the turntable 3, as will be described later. The second assembly also includes:
A fitting hole 11 into which the shaft 2 fits is provided.

The head of the first assembly and the table holder 16 are fixed via a hall bearing I9.

The table holder 16 is pulled downward by a table spring 17.

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

First, in FIG. 2, the video disc 14 that has been conveyed between the motor shaft 2 and the clamper 5 is stopped directly above the motor shaft 2. Next, the disc 14 is lowered and placed on the slope 10 of the video disc hub 6.

Reference is now made to FIG. Next, when the clamper 5 is lowered, the fitting hole 11 of the clamper 5 and the motor shaft 2 fit together. As it descends further, the video disc clamper 5 and the video disc 14 come into contact with each other, and the disc 14 descends while being aligned with the slope 10 of the video disc hub 6, and is successively clamped by the turntable 3 and the video disc clamper 5. leading to. The outer diameter of this video disc clamper 5 is sufficiently large as described above, so that the disc 1
4 can be prevented from occurring. Also, at this time, the compact disc clamper 8 is fitted into the clearance groove 13 adjacent to the video disc hub 6.

Next, the installation of a compact disc will be explained using FIG. 6. Compact disc 1 transported in the same way as before
5 is lowered and placed on the inclined part 9 which becomes the centering part of the compact disc hub 4, and is aligned.

A compact disc clamper 8 that descends while sliding with respect to the motor shaft 2 in the fitting hole 11 comes into contact with the compact disc 15 and presses the top surface thereof.

In this way, the compact disc 15 is rotated twice and then mounted on the turntable 3.

The outer diameter of the turntable 3 is more than 35 mm and less than 50 mm, and the starting diameter of the recording surface of the compact disc 15 is 50 mm. There is no interference from turntable 3.

Next, the playback state will be explained. The rotation of the motor shaft 2 causes the turntable 3 to rotate and transmit rotation to the disk. Also, since the disk is pressed between the clamper 5 (or 8) and the turntable 3 by the force of the table holder spring 17, the entire turntable 3, hubs 4, 6, and clampers 5, 8 are held at the hair ring 19. Pressure contact rotation movement.

Also, bearings have low frictional resistance, so they do not affect rotation.

〔Effect of the invention〕

As detailed above, according to the disc loading device according to the present invention, even though there are differences in shape between video discs and compact discs depending on the disc standard, no matter which disc is loaded, the light will not be transmitted to the turntable. The clamper diameter can be increased to improve the stability of the disc, and discs can be installed even if the hole diameter is different, allowing both video discs and compact discs to be installed interchangeably. The advantage is that it is possible.

[Brief explanation of drawings]

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... Drive motor, 2... Motor shaft, 3...
... Turntable, 4... Hub for compact disc, 5... Clamper for video disc, 6... Hub for video disc, 7... Hanging, 8... Clamper for compact disc, 9...・Slope part of hub 4, 10・
...Slanted part of hub 6, 11...Fitting hole, 12...E
Ring, 13...Escape groove, 14...Video disc, 15...Compact disc, 16...Table holder, 17...Spring, 19...Ball hair ring, 20...Pickup, 21...transport table,
22... Housing, Agent Patent Attorney Akio Namiki Figure 3 Figure 5 Figure 6

Claims (1)

[Claims] (2) A disk mounting device capable of selectively mounting either a first disk or a second disk having mutually different hole diameters,
A first assembly comprising a turntable concentrically attached to the shaft side of the disk drive motor, a first disk alignment mechanism, and a second disk alignment mechanism; a second assembly comprising a first disk clamper and a second disk clamper disposed concentrically with each other;
When a disk is installed, the first disk aligned by the first alignment mechanism is held between the turntable and the first clamper, and when a second disk is also installed, A disk mounting device characterized in that the second disk aligned by the second alignment mechanism is clamped by the turntable and a second clamper.