JPH0690845B2 - Disk mounting mechanism - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc recording / reproducing apparatus, and particularly to a disc suitable for mounting on an auto-loading type disc reproducing apparatus capable of reproducing discs having different diameters. Regarding mounting mechanism.

BACKGROUND OF THE INVENTION An example of a conventional auto-loading type disc reproducing apparatus capable of reproducing discs having 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 cross-sectional view of FIG. 1 taken along the line AA ′.

Next, the configuration of the conventional device 1 will be described. The conventional device 1 includes a main body 2 and an auto loading unit 3.

Further, the auto loading section 3 moves the turn table 4 for rotating the disk 6, the spindle 5 fitted into the center hole 7 of the disk 6, and the auto loading section 3 in parallel in the B-Ba direction, so that the auto loading section 3 meshes with the gear motor 11. It is composed of a rack gear 10.

Further, the main body 2 meshes with the rack gear 10, and the C-Ca
By rotating in the direction, the auto loading unit 3
It is composed of a gear motor 11 for moving in parallel in the Ba direction, a clamper 8 for holding the disc 6 after the auto loading part 3 is housed in the main body 2, and a pickup 9 for reproducing a signal during rotation of the disc 6. Next, the operation of the conventional device will be described. When a signal is reproduced from the disk 6, the gear motor 11 is rotated in the Ca-C direction and the rack gear is moved in parallel in the Ba-B direction so that the auto-loading unit 3 is conveyed to the outside of the main body. Auto loading part 3
After being carried out of the main body and after being carried out of the main body by the auto-loading section 3, the user can see the disc 6 by his / her own eyes and feel the hand, and the very small central hole 7 of the disc 6 and the spindle 5 on the turntable. And fit. After the fitting is completed, the gear motor is rotated in the Ca-C direction opposite to the previous one, and the auto loading unit 3 is housed in the main body. The clamper 8 presses the disc 6 against the turntable 4, and the turntable is rotated to rotate the disc 6, and the pickup 9 reproduces the signal recorded on the disc 6.

When reproducing discs having different diameters, the above-described conventional device puts the disc 6 on the front of the turntable 6 and visually confirms by the user himself that the center hole 7 and the spindle 5 are very small with respect to the diameter of the disc 6. It is necessary to fit the disk 6 to the turntable 4, and in most cases the disk 6 is made of an impermeable material, and fitting the disk 6 and the turntable 4 is a little inconvenient. Accompanied by. Further, when the pickup 9 is arranged below the turntable 4 and the signal recording surface 12 of the disk 6 is mounted downward, the disk recording surface and the spindle 5 come into contact with each other, and the signal recording surface 12 is scratched. There was a possibility to attach it. In addition, since the turntable 4 rotates, the turntable 4 has a built-in rotation mechanism, which makes the turntable 4 heavy.
As the gear motor 11 is forced to use a powerful motor, the rack gear 10 and the auto loading section 3 are conveyed.
Also needed something that could withstand the weight of the turntable 4.

Next, a second conventional device that compensates for the drawbacks of the conventional device will be described with reference to the drawings.

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

FIG. 4 is an explanatory diagram showing the force received by the disc from the positioning mechanism of FIG.

The configuration of the second conventional device will be described below. A transfer device for transferring the inserted disc 6 to the turntable 4 is connected inside the insertion opening 13 of the disc 2 provided on the front surface of the conventional device 8. The transfer device includes drive rollers 14, 14a, 14b,
The caster roller 16 is arranged in contact with the central drive roller 14a. The caster roller 16 can be easily oriented in either direction because the rotation axis of the caster roller 16 is at a twisted position with respect to the vertical axis 17.

The turntable 4 is in the lowered position when the disc 6 is not recorded and reproduced, and is raised only when the disc 6 is recorded and reproduced. Auxiliary rollers are provided on both sides (not shown) of the turntable 4 and cooperate with the transfer device to keep the disk 6 horizontal when the turntable 4 is in the lowered position.

Two guide posts 15 and 15a are arranged at the position opposite to the transfer device of the turntable 4 at the same distance from the spindle 5 at the center of the turntable 4, and the diameter of the disk 6 inserted from the insertion opening 1 is increased. The distance is changed accordingly.

Next, the operation of the second conventional example will be described. Disk 6
The disk 6 inserted from the insertion slot 13 of the
When it is sandwiched between the rollers 14, 14a, 14b and the caster roller 16 and transferred, and reaches the top of the turntable 4 in the lowered position, the edge of the disk 6 comes into contact with the guide post 15 (or 15 '), Upon receiving the component force Fb shown in FIG. 4, it is rotated in the direction of Fb. At this time, since the caster roller 16 easily faces the direction of Fb, the disc 6 rotates around the guide post 15 and contacts the guide post 15 to position the disc 6 on the turntable 4.

And the turntable 4 and the spindle 5 also rise,
The spindle 5 fits into the center hole 7 of the disc 6, and although not shown, a clamper equivalent to the first conventional device presses the disc 6, the guide posts 15 and 15a move away from the disc 6, and the turntable 4 rotates, and although not shown, a pickup equivalent to the pickup 9 of the first conventional device reproduces a signal from the disc 6.

In the second conventional device described above, the disk 6 can be mounted on the turntable 4 even if the disk 6 is mounted without strictly considering the relationship between the center hole 7 of the disk and the spindle 5.
Since the disk 6 is sandwiched between the drive rollers 14, 14 ', 14 "and the caster roller 16 and the disk 6 rotates around the guide post 15, the signal recording surface of the disk 6 is easily scratched. It is necessary to change the distance between the post 15 and the spindle 5 exactly in accordance with the diameter of the disk 6, and the mechanism for moving the guide post 15 may be more complicated than the disk reproducing mechanism.

The drawbacks of each of the above conventional devices can be summarized as follows.

(1) When the disc 6 is mounted on the turntable 4, the disc 6 is easily scratched.

(2) If the disc mounting mechanism is simplified, it takes time to mount the disc 6, and if the disc 6 is simply mounted, the disc mounting mechanism becomes complicated and the manufacturing cost is high.

[Object of the Invention] An object of the present invention is to provide a simple disk mounting mechanism capable of quickly mounting disks having different diameters without scratching the signal recording surface, except for the above-mentioned drawbacks of the prior art. .

[Summary of the Invention] In order to achieve the above object, according to the present invention, a disk mounting mechanism for loading or unloading a disk as a recording medium mounted on a disk mounting section of a disk loading section into or out of the apparatus main body. In the above, the disc mounting portion has a plurality of step portions having different outer diameters corresponding to a plurality of types of discs having different disc outer diameters, and the first step portion on which the small diameter disc is mounted is the large diameter disc. The center position of the disc is formed so as to be eccentric with respect to the second step to be mounted in the carrying-out direction, and the disc is selectively moved in the outer direction of the apparatus body to a position corresponding to the outer diameter of the mounted disc. The configuration is

[Examples of the Invention] The present invention will be described below with reference to Examples.

FIGS. 5 and 6 are perspective views showing an embodiment in which the steps 19 and 20 are arranged with their centers displaced from each other. In the auto-loading unit 3 for mounting a disc, FIG. 5 shows that a stage 19 for mounting a disc having a smaller diameter is arranged in the disc unloading direction as compared with a stage 20 for mounting a disc having a smaller diameter. When a disc 6 having a smaller diameter than that of a disc having a larger diameter is mounted on the auto loading section 3, when the disc 6a having a diameter larger than the disc 6 is mounted after being transported in the transport direction of the auto loading section 3 by a length of l1, The l2 is used to carry out the auto-loading unit 3 in the carrying-out direction of the apparatus.

As described above, according to the present invention, the length for carrying out the auto loading unit 3 in the carrying-out direction is changed according to the diameter of the disc, that is, the stages 19 and 20 of the auto loading unit 3 are
When a disc is placed, the center position of the placed disc is made different, and the step 19 having a small diameter is located in the unloading direction of the auto loading section.

Therefore, in the case of a disc having a small diameter, the length for carrying out the autoloading unit is made shorter than that in the case of a disc having a large diameter, and the disc 6 having a small diameter is mounted.

In the above embodiment, the plurality of steps 19 and 20 are supposed to have a substantially circular shape, but the present invention is not limited to this, and shapes other than circular, such as a substantially triangular shape or a substantially quadrangular shape, are used. May be

EFFECTS OF THE INVENTION According to the present invention, when discs with different diameters are mounted, the discs with smaller diameters are mounted in a direction in which they are carried out in the direction in which they are carried out by the auto-loading unit, so that the discs with smaller diameters are mounted. It is possible to shorten the time, prevent accidental loading, and obtain a convenient disc loading mechanism.

[Brief description of drawings]

FIG. 1 is a perspective view of a first conventional device, and FIG.
-A 'line sectional view, FIG. 3 is a perspective view of a second conventional device,
FIG. 4 is an explanatory view of FIG. 3, FIG. 5 is a perspective view of the second embodiment, and FIG. 6 is a perspective view of the second embodiment. 1 ... Playback device for playing discs with different diameters, 2 ... Main body, 3 ... Auto loading part, 4 ... Turntable, 5 ... Spindle, 6 ... Small diameter disc, 6a ... Large diameter disc, 19: Step for mounting the disk 6, 20: Step for mounting the disk 6a, 21: Guide hole, 22: Stopper

Claims (2)

[Claims] 1. A disk mounting mechanism for loading or unloading a disk as a recording medium mounted on a disk mounting section of a disk loading section into or out of the apparatus main body, wherein the disk mounting section is outside the disk. A first step portion having a plurality of step portions having different outer diameters corresponding to a plurality of kinds of discs having different diameters, and a first step portion to which a small diameter disc is attached is a disc for a second step portion to which a large diameter disc is attached. A center position is formed so as to be eccentric in the carry-out direction, and the structure is selectively moved in the outer direction of the apparatus main body to a position corresponding to the outer diameter dimension of the mounted disk. Disk mounting mechanism. 2. The disk mounting portion is moved to a position where the protruding amount of the first step portion or the second step portion to the outside of the apparatus main body is substantially equal to the outer diameter dimension of the mounted disk. The disk mounting mechanism according to claim 1, which is configured as described above.