JPS60177464A - Disc loading mechanism - Google Patents

Abstract

PURPOSE:To load disc quickly by providing a disc guide provided with plural steps in accordance with diameters of discs and fitting discs different in diameter to a center shaft. CONSTITUTION:In case that signals are reproduced from a disc 6 or 6a, a gear motor 11 is rotated in the direction of arrows Ca-C to move a rack gear in parallel in the direction of arrows Ba-B, and then, an auto-loading part 3 is carried to the front. After the auto-loading part 3 is carried to the front, the disc 6 or 6a is put on a step 19 or 20. The diameter of the step 19 is equal to or slightly larger than that of the disc 6, and the diameter of the step 20 is equal to or larger than that of the disc 6a. Steps 19 and 20 are formed to circles having the same center, and it is sufficiently if a user put on the disc 6 or 6a on the step 19 or 20 merely.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a disc recording and reproducing method, and is particularly suitable for being installed in an autoloading disc reproducing device capable of reproducing recordings on discs of different diameters. This invention relates to a disc mounting mechanism.

[Background of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a conventional autoloading type disc playback device that can play discs with different diameters will be described with reference to the drawings.

FIG. 1 is a perspective view showing an example of a conventional device, and FIG. 2 is a sectional view of FIG. 1 taken along line A-A'.

Next, the configuration of the conventional device 1 will be explained. Conventional device 1 has main body 2
, an autoloading section 3.

The autoloading section 3 also meshes with a turntable 4 that rotates the disk 6, a spindle 5 that engages with the center hole 7 of the disk 6, and a gear motor 11 to move the autoloading section 3 in parallel in the B-Ba direction. It is composed of a rack gear 10.

The main body 2 also meshes with the rack gear 10 so that the C-C
By rotating in direction a, the autoloading section 3 is moved to B-
It is composed of a gear motor 11 for parallel movement in the Ba direction, a clamper 8 that presses down the disk 6 after the autoloading section 3 is housed in the main body 2, and a pickup 9 that reproduces a signal while the disk 6 is rotating. Next, the operation of the conventional device will be explained. When reproducing the signal from the disk 6, the autoloading unit 3 is transported to the front by rotating the gear motor 11 in the Ca-C direction and moving the rack gear in parallel in the Ba-B direction. After the autoloading part 3 is carried out to the front, the very small center hole 7 of the disk 6 and the spindle 5 on the turntable are brought together by the user's own visual inspection and sense of touch. After the engagement is completed, the gear motor is rotated in the Ca-C direction, which is opposite to the previous one, and the autoloading section 3 is housed in the main body. Then, by pressing the disc 6 against the turntable 4 by the clamper 8 and rotating the turntable, the disc 6 is rotated, and the signal recorded on the disc 6 is reproduced by the pickup 9.

In the conventional device described above, when playing discs with different diameters, the disc 6 is placed in front of the turntable 6, and the user visually identifies the center hole 7 and spindle 5, which are very small compared to the diameter of the disc 6. In most cases, the disc 6 is made of non-transparent material, so it takes some time to fit the disc 6 and the turntable 4. It was inconvenient. In addition, when the pickup 9 is placed below the turntable 4 and the disc 6 is mounted with the signal recording surface 12 facing downward, the disc recording surface and the spindle 5 may come into contact and the signal recording surface 12 may be scratched. There was a possibility of adding it. In addition, since the turntable 4 rotates, it has a built-in rotation mechanism and is heavy, and since the turntable 4 is transported to the front, a powerful gear motor 11 must be used. 3 also needed something that could withstand the weight of the turntable.

Next, a second conventional device that compensates for the drawbacks of the above-mentioned conventional device will be explained with reference to the drawings.

FIG. 3 is a perspective view of a positioning mechanism for mounting disks of different diameters in a second conventional device.

FIG. 4 is an explanatory diagram showing the force that the disk receives from the positioning mechanism of FIG. 3.

The construction of the second conventional device will be explained below. A transfer device for transferring the inserted disk 6 to the turntable 4 is connected to the inside of an insertion opening 13 for the disk 2 provided on the front side of the conventional device 8. The transfer device includes drive rollers 1, 4, 14.
a, 14I) and a caster roller 16 disposed parallel to the central driving roller 14a, and the caster roller 16 can be easily rotated in either direction because its axis of rotation is in a torsional position with respect to the vertical axis 17. It can be turned.

The turntable 4 is in a downward position fNtl when the disc 6 is not recording or reproducing, and rises only when the disc 6 is recording or reproducing. Further, auxiliary rollers (not shown) are provided on both sides thereof, which cooperate with the transfer device to keep the disk 6 horizontal when the turntable 4 is in the lowered position.

Two guide bosses (15.15a) are placed on the opposite side of the turntable 4 from the transfer device, at equal distances from the spindle 5 at the center of the turntable 4, and are arranged at equal distances from the spindle 5 at the center of the turntable 4. The distance is changed according to the size. Next, the operation of the second conventional example will be explained.

The disk 6 inserted from the insertion slot 13 of the disk 6 is
When the disc 6 is transported between the drive rollers 14, 14a, 14b and the caster roller 16 and reaches the top of the turntable 4 in the lowered position, the edge of the disc 6 hits the guide post 15 (or 15'). contact, receives a component force Fb shown in FIG. 2, and is rotated in the direction of FL+. At this time, since the caster roller 16 easily faces the direction Fb, the disc 6 rotates around the guide post 15,
The disc 6 is positioned on the turntable 4 by contacting the guide post 15.

Then, the turntable 4 and spindle 5 also rise,
The spindle 5 is engaged with the center hole 7 of the disk 6, and although not shown, a clamper equivalent to the first conventional device presses down the disk 6 and presses the disk 6 (guide post) 15.1.
5a is separated from the disk 6, the turntable 4 rotates, and, although not shown, a pickup 9 equivalent to the first conventional device reproduces the signal from the disk 6.

In the second conventional device described above, the disc 6 could be mounted on the turntable 4 even if the disc 6 was mounted without strictly considering the relationship between the center hole 7 of the disc and the spindle 5. Since the disk 6 rotates around the guide post 15 while being sandwiched between the rollers 14, 14, 14 and the caster roller 16, it was easy to scratch the recording surface of the disk 6 (number i). It is necessary to change the distance exactly equal to the spindle 5 depending on the diameter of the disk 6, and there is a possibility that the mechanism for moving the guide post 15 is more complicated than the disk playback mechanism.

To summarize the drawbacks of each of the above conventional devices, they are as follows: (1) When the disk 6 is mounted on the turntable 4, the disk 6 is easily scratched.

(2) If the disk mounting mechanism is simplified, it will take time to load the disk 6, and if the disk 6 is simply installed, the disk loading mechanism will be complicated and the manufacturing cost will be high.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a simple disk mounting mechanism that eliminates the drawbacks of the prior art described above and allows disks of different diameters to be quickly mounted without damaging the signal recording surface.

[Summary of the invention]

The present invention resides in that a plurality of stages corresponding to the diameters of discs having different diameters are arranged in the autoloading section.

[Embodiments of the invention]

The present invention will be explained below by way of examples. FIG. 5 shows a perspective view of an embodiment of the present invention, and FIG.
FIG. 7 is a sectional view taken along line D'.

FIG. 8 is a partially enlarged view of FIG. 5 in order to explain the effects specific to the present invention. Next, the configuration of this embodiment will be explained.

In the first embodiment, the main body 2. It is composed of an autoloading section 3.

In addition, the autoloading section 3 has disks 6 with different diameters.
．． Discs 6.6a with different diameters for mounting 6a
It has 19 steps 20 that match or are slightly larger than the diameter of
The meter loading section 3 is moved in the B-Ba direction or Ba
For parallel movement in the -B direction, it is composed of a gear motor 11 and a rack gear 10 that mesh with each other. Further, the main body 2 is mutually engaged with the rack gear 10, and the C-C
A gear motor 11 rotates in the a direction or the Ca-C direction to make the autoloading section 3 parallel to the B-Ba direction or the Ba-B direction. After the autoloading section 3 is housed in the main body 2, the disk 6 or 6a, a turntable 4 for rotating the disk 6 or the disk 6, a clamper 8 for pressing the disk 6 or the disk 6a, and a pickup 9 for reproducing signals from the disk 6 or the disk 6a. Ru.

The operation of this embodiment will be explained based on the above configuration.

When reproducing a signal from disk 6 or disk 6a,
By rotating the gear motor 11 in the Ca-C direction and moving the rack gear in parallel in the a-B direction, the autoloading section 3 is transported to the front. After the autoloading section 3 is carried out to the front, -, the disk 6, or the disk 6a onto the step 19 or 20. The diameter of step J9 is the same as the diameter of disk 6, or the diameter of step 19 is slightly larger, and the diameter of step 20 is the same diameter as the diameter of de-r-suf 6a, or the diameter of step 20. is forming a bit of a dog. Further, the step 19 and the step 20 are circular steps having the same center. The user simply places the disk 6 or disk 6a of a different diameter onto the step 19 or step 20, and the disk is quickly matched to the step that matches the diameter of the disk.

Next, the gear motor is rotated in the C-Ca direction opposite to the tip, the rank gear 10 is moved in the B-Ba direction, the autoloading 3 is stored in the main body 2, and the arrow paper 14a turntable 4 is raised. It passes through the guide hole 21. Then, engage the disk 6 or disk 6a with the spindle 1' 5. Further, even if the autoloading section 3 is lowered, the same effect can be obtained. At this time, since the steps 19 and 20 are circular with the same center, disks 6 or 68 having different disk diameters can be easily mounted on the tar/table 4. Then, the clamper 8 presses down the disc 6 or the disc 6a to rotate the turntable 4 as a unit, and the pink-up 9
) to reproduce the signal from the disk 6 or disk 6a.

One advantage of this embodiment is that since the a number of stages 191 and 20 are located on the same center, the user does not have to search for the centers of the discs 6 and 6a, and the positioning mechanism determines the center of the disc 6° and the disc 6a. It has the advantage that it can also be eliminated.

As a result, discs with different diameters can be quickly and reliably loaded into the disc playback device, and the stage can also be integrally molded into the autoloading section 3, so that the positioning mechanism can be used for conventional discs with a diameter of 7z. There are two advantages to this product: it should be possible to lower manufacturing costs compared to regeneration equipment.

FIG. 9 is a perspective view showing a second embodiment in which the steps 192 and 20 are arranged not on the same center.

This has a smaller diameter than stage 20, and stage 19 is placed in the front.
By doing so, the disk 6, which has a smaller diameter than the disk 6',
When loading the auto-loading section 3 to the auto-loading section 3, transport the auto-loading section 3 to the front by the length of [top], and when installing the disk 6' whose diameter is larger than the disk 6, 12
2nd step to carry out the loading section 3 to the front
In the example, $).

As described above, the second embodiment is operated according to the diameter of the disk.
1-This type moves the loading section 3 forward, and the stage 19. Since the stage 20 is not located above the center of 1b, 1-1, when the disk 6a is installed, the auto-loading section 3 will protrude from the main body by 22-Jl-1. In the case of a disk, it shines in rainbow colors while the disk is rotating, making it an effective component.

Also, the steps 191 and 20 should be circular (・Ine Tsukasa～・If you take the design into consideration, the figures 11 and 12
As shown in the figure, there is no problem even if it is a polygon.

[Movement of invention]

According to the present invention, there is no need for a positioning mechanism when installing a disk with a diameter p, and the stage can be manufactured by integral molding with the autoloading part, resulting in a significant reduction in the number of parts. This reduces product costs, improves product reliability as the disk signal recording surface is not scratched, and eliminates the need for the user to fit the spindle to the small center hole of the disk. This has the effect of allowing faster installation compared to.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the first conventional device, and Figure 2 is an illustration of Figure 1.
-A' line sectional view, Figure 3 is a perspective view of the second conventional device, Figure 4 is an explanatory diagram of Figure 3, Figure 5 is a sectional view of this embodiment, and Figure 6 is Figure 5. A cross-sectional view taken along line D-D' of FIG.
A sectional view of the main part of the figure. Figure 8 is a side view of the main part of Figure 5, Figure 9 is a perspective view of the 20th length embodiment, Figure 10 is a perspective view of the second embodiment, and Figure 11 is a perspective view of the second embodiment.
The figure is an application diagram of the first embodiment, and FIG. 12 is an explanatory diagram showing an application example of the first embodiment. 1. A disc playback device that plays back discs with different diameters. 2. Main body. 3...Auto loading section. 4... Turntift, 5... Spindle. 6. Small diameter desk, (3a large diameter desk 19.
・The stage on which the disc 6 is placed. 20... Stage on which the disk 6a-2 is placed. 21. Guide hole, 22. Stopper. 23... Pantograph. 1st Enjo 22nd 4th Crusade 50 βi-B 7th 6e 8th Thought':l solid no q) ノ□ffJ3 〆ku No. 110

Claims (1)

[Claims] In a disc playback device equipped with a turntable that rotates and holds the disc in order to reproduce the signal on the signal recording disc, a central axis that determines the center of the disc, and a disc guide that transports the disc to the turntable, A disk mounting mechanism characterized in that a disk guide with a plurality of stages is provided, and disks of different diameters are fitted onto the central shaft.