JPS60164952A - Disk holding device - Google Patents

Abstract

PURPOSE:To hold a disk surely on a disk table and to make the space very small by so constituting the titled device that plural pressing members assume the first mode of pressing the disk from above the disk placing face or the second mode of not engaging with the disk. CONSTITUTION:Plural disk pressing members 16 that press and hold the disk onto the disk placing face are held on a disk table 1 by a supporting mechanism to allow rotation and to allow linear movement in the direction of getting neat to and separating from the disk table 1. As a driving mechanism that rotate the plural disk pressing members 16 is placed under the disk placing face, holding of the disk on the disk placing face is made surely and firmly. At the same time, the space required for its installation and operation is very small. Accordingly, a disk player that adopts this system becomes suitable for miniaturization. Adoption of various disk loading systems also becomes possible.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is used in an optical disc player or the like to hold a disc placed on a rotating disc table to prevent it from moving or coming off during rotation. The present invention relates to a disc holding device.

BACKGROUND ART AND PROBLEMS Generally, an optical disc player is equipped with a disc holding device that includes a disc table that rotates a disc, and a disc that is placed on the disc table that rotates at a relatively high speed. is held in such a way that it does not move on the disk table or come off the disk table. Conventionally used disc holding devices hold the disc by pressing the disc placed on the disc table toward the disc table using a presser placed above the disc table. Furthermore, when the disc is removed from the disc table, the presser is generally raised above the disc table and placed in a standby state.

By the way, even in disc players, the so-called
Although miniaturization including thinning is desired, the conventional disc holding device as described above requires a relatively large space above the disc table for the installation and movement of the presser. This has become one of the obstacles to miniaturizing disk players.

Furthermore, in such conventional disc holding devices, the holding device is placed above the disc table, which reduces the degree of freedom in loading the disc onto the disc table in a disc player. .

Purpose of the Invention In view of the above, the present invention is capable of reliably holding a disc on a disc table, requires an extremely small space for its installation and operation, and moreover, has a method for loading a disc in a disc player to which this invention is applied. It is an object of the present invention to provide a disc holding device that can significantly reduce restrictions regarding the system.

Summary of the Invention A disk holding device according to the present invention includes a spindle, a disk table that forms a disk mounting surface and rotates integrally with the spindle, and a plurality of disks arranged around the rotation center of the disk table. a disc holding member;
A support mechanism that supports each of the plurality of disc holding members so as to be rotatable in a plane substantially parallel to the disc mounting surface and movable in a direction substantially perpendicular to the disc mounting surface, and a disc table. A first mode in which a plurality of presser members are arranged below the disk placement surface and each presses a disk placed on the disk placement surface from above the disk placement surface or does not engage the disk. In order to adopt the second aspect, the device is configured to include a drive mechanism that simultaneously rotates and slides in a predetermined direction. With this configuration, it is possible to securely hold the disc on the disc table, and not only does it not require a large space above the disc table, but also allows for easy installation and operation. The space required for this is extremely small.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of a disc holding device according to the present invention,
This example is adapted to be applied to an optical disc player.

As shown in FIGS. 2 and 3, a generally disk-shaped disk table 1 is provided, and this is fixed to a spindle 2. As shown in FIGS. The spindle 2 is rotated by a motor (not shown), and therefore, the disk table 1 is rotated integrally with the spindle 2 by the motor with the spindle 2 as its center of rotation. An annular thick part 3 is provided on the outer peripheral edge of the disc table 1.
is formed, and in the center of the disk table l,
A bottomed cylindrical portion 4 is formed. A gear 5 is provided on the outer peripheral wall of the bottomed cylindrical portion 4, and three support shafts 6 are provided on the bottom surface of the bottomed cylindrical portion 4 as clearly shown in FIG. are planted at equal intervals surrounding the spindle 2,
A circular arc-shaped through hole 7 is provided in a portion of the periphery of each support shaft 6 . Furthermore, a rotation prevention pin 8 is also installed on the bottom surface of the bottomed cylindrical portion 4. In such a disc table l, a plane including the upper surface of the annular thick part 3 at the outer peripheral edge forms a disc mounting surface.

In the bottomed cylindrical portion 4 of the disk table 1, a disk 4 is placed.
A center ring member 9 is arranged into which the center hole 41 of No. 0 fits. This centering member 9 is provided with a center hole 10 and three semicircular notches 1.
1 surround the center hole 10 and are formed at equal intervals. Further, the centering member 9 is provided with an attachment hole 12, and the rotation prevention pin 8 and the spindle 2 are loosely fitted into the attachment hole 12 and the center hole IO, respectively. A spring 13 is fitted into the spindle 2 and is disposed in a compressed state between the center ring part 1rjf 9 and the bottom surface of the bottomed cylindrical part 4. A female screw is formed at the upper end of the spindle 2, into which a mounting screw 14 is screwed through a washer 15 that restricts upward movement of the center ring member 9. With this configuration, when the centering member 9 is pressed from above in FIG.
It can be moved downwardly along the spindle 2 and the anti-rotation pin 8. Further, the centering member 9 is secured to the spindle 2 in the bottomed cylindrical portion 4 by the rotation prevention pin 8.
Rotation around the disk table 1 is restricted.
rotates as one.

On the other hand, above the disk table 1, a plurality of disk holding members 16, three in this case, are arranged at equal intervals around the spindle 2, and therefore around the rotational center of the disk table 1. ing. The shape of each disk holding member 16 is selected so that, as shown in FIG. 1, when the disk holding members 16 are all assembled, a disk is formed with an inclined peripheral edge. Further, at the base end of each disk holding member 16,
As shown in FIG. 2, a mounting hole 17 is provided, and
Pin 18 is planted. Each disk holding member 16 has a base end portion formed in the semicircular notch 1 of the centering member 9.
1, and the mounting hole 17
is fitted onto the support shaft 6, and the bottle 18 passes through the arc-shaped through hole 7 of the disc table 1 and projects below the disc table 1. Furthermore, an elastic member 19 made of rubber or the like is attached to the tip of each disk holding member 16. With such a configuration, each disk holding member 16
can rotate around the support shaft 6, and can also move linearly along the support shaft 6.

Further, a presser metal fitting 20 is provided to urge each disc presser member 16 toward the disk table l side, and this presser metal fitting 20 is formed in a triangular shape as a whole, and each top end thereof has a U-shape. A notch is provided. The respective tip ends of the support shafts 6 passing through the mounting holes 17 of the disk holding member 16 are engaged with these [1-shaped notches]. In addition, a bottomed cylindrical portion 2 is provided at the center of the presser metal fitting 20.
1 is provided, and a through hole 22 is provided in the bottom surface thereof. A mounting screw 14 is loosely inserted into the through hole 22, and a spring 23 is disposed in a compressed state in the bottomed cylindrical portion 21 surrounding the mounting screw 14.

With this configuration, the presser metal fitting 20 and, therefore, each disk presser member 16 are urged toward the disk table 1 by the spring 23. A bottomed cylindrical portion 4 having a support shaft 6 and an arc-shaped through hole 7 is provided. Presser metal fitting 20. The one-way screws 14 and the like form a support mechanism for the plurality of disk holding members 16.

At a position below the disk mounting surface of the disk table 1, in this example, below the bottomed cylindrical portion 4 of the disk table l,
A rotating body 24 forming a drive mechanism is arranged. A gear 25 is provided on the outer circumferential wall of this rotating body 24, and a center hole 26 through which the spindle 2 is inserted is provided, as well as three eccentric cam grooves 2, as clearly shown in FIG.
7 surround the center hole 26 and are provided at equal intervals.

As clearly shown in FIG. 4, each eccentric cam groove 27 includes an arcuate groove portion 28 having the center of the center hole 26 as its center, and a bent groove portion 29 that protrudes from the arcuate groove portion 28 toward the center hole 26 side. The arcuate groove portion 28 has an inclined bottom surface, and its depth is gradually increased from one end connected to the bent groove 29 to the other end.

That is, the depth changes in the direction substantially perpendicular to the disk mounting surface. Note that a through hole 30 is formed in the bottom surface of the other end of the arcuate groove portion 28 .

The rotating body 24 formed in this manner can rotate relative to the spindle 2 and the disk table 1.

Then, the tip of the bottle 18 of each disk holding member 16 is
The rotating body 24 passes through the circular arc-shaped through hole 7 of the disc table 1.
The end surface thereof is in contact with the bottom surface of the eccentric cam groove 27. Therefore, each disk holding member 1
When the rotating body 24 rotates with respect to the disk table 1, the bin 18 of No. 6 is moved in the axial direction by the bottom surface of the eccentric cam groove 27 of the rotating body 24. Further, each disk holding member 16 has a pin 18 that is connected to an eccentric cam groove 27.
When the disk holding members 16 are located in the bending groove portion 29 of the disk, as shown in FIG. 1, the plurality of disk holding members 16 are assembled to form a disk. Note that a metal fitting 31 for preventing removal is used to prevent the rotating body 24 from coming off the spindle 2.

To explain the operation of holding the disk 40 on the disk table 1 in an example of the disk holding device according to the present invention configured as described above, first, the center hole 41 of the disk 40 is as shown in FIG. It passes through the assembled state and the plurality of disk holding members 16, and is fitted into the centering member 9. In this case, as shown in FIG. 3, the portion where the outer diameter of the centering member 9 is the same as the diameter of the center hole 41 of the disk 40 is
Since it is positioned above the disk mounting surface, the disk 40 is maintained slightly above the disk mounting surface. Next, the rotating body 24 is rotated relative to the disk table 1 in the direction of arrow a in FIGS. 1 and 5 by, for example, a driving means as shown in FIG. 8, which will be described later.

Here, the state of engagement between each eccentric cam groove 27 of the rotating body 24 and the pin 18 of each disk holding member 16 will be explained with reference to FIG. 5. When the rotating body 24 rotates in the direction of arrow a, ,
The bin 18 of each disk holding member 16 moves from a position within the bending groove 29, indicated by a broken line, to a position within the arcuate groove 28, indicated by a chain line. As a result, the plurality of disk holding members 16 rotate all at once about the spindle 6 in the direction of the arrow mark, and change from a grouped state to a dispersed state, with their respective tips touching the annular shape of the disk table 1. It will be in a state located above the thick part 3. From this state, the rotating body 24 further rotates in the direction of the arrow a, and the end surface of the bottle 18 of each disk holding member 16 is in contact with the inclined bottom surface of the arcuate groove 28, so that its axis direction, i.e., arcuate groove 2
Move in the depth direction of 8. As a result, each disc holding member 16 moves in a direction approaching the disc table l along the spindle 6, and finally, as shown in FIG.
The plurality of disk holding members 16 are separated from each other, and their respective tips are placed close to and opposite to the disk mounting surface. As a result, as shown in FIG. 7, the elastic members 19 of each disk holding member 16 come into pressure contact with the upper surface of the disk 40, suppressing the disk 40 from above the disk mounting surface. In this case, the centering member 9 is moved slightly downward along with the disk 40, as shown in FIG.
The disc is held in close contact with the disc mounting surface including the upper surface of the disc. By providing such a centering member 9, the disk 40 is held on the disk table 1 in a state in which the center of the center hole 41, which should be the center of rotation, coincides with the center of rotation of the disk table 1. This is what happens. Although not shown, the disk 40 used in this example has a center hole 41.
A thick annular portion called a chucking area is formed around the chucking area, and this chucking area portion is placed on the thick annular portion 3 of the disc table 1. The member 16 is designed to primarily press the upper surface of this chucking area.

Next, when the disk 40 is removed from the above-described state held on the disk table 1, the rotating body 24 is rotated in the opposite direction to that in the above-described case. As a result, the pins 18 of each disk holding member 16 are moved into the eccentric cam groove 2.
7 is pushed up by the bottom surface of the arcuate groove 28, and then returns to the position within the bending groove 29. Along with this, each disk holding member 16 moves in a direction away from the disk table I along the spindle 6, and then the entire disk holding member 16 comes together, and the disk 40 is removed from the disk table I. The state of obtaining is taken.

Next, an example of the above-mentioned driving means for rotationally driving the rotating body 24 with respect to the disk table 1, and thus rotationally driving each disk holding member 16, will be described. A moving plate 50 as shown is used. The movable plate body 50 is formed with parallel protruding plate parts 51 and 52, and the inner walls of the protruding plate parts 51 and 52 are provided with
U-tsuku 53 and 54 are provided. U-Tsuku 53
The rack 54 meshes only with the gear 5 of the bottomed cylindrical portion 4 of the disc table 1, and the rack 54 meshes with the gear 25 of the rotating body 24.
It is said that the teeth fit only in the Moreover, the movable plate body 50
A through-hole portion 55 having a diameter larger than that of the bottomed cylindrical portion 4 and the rotating body 24 is formed in the cylindrical portion 4 . and,
The movable plate 50 is capable of linear movement in the direction of arrow C or d in FIG.

In such a configuration, the movable plate 50 is usually the eighth
placed in the condition shown in the figure. That is, the racks 53 and 54 are meshed with the gears 5 and 25, respectively, and in this state, each disk holding member 16 is in the state shown in FIG. 1.

When the rotating body 24 is driven to rotate relative to the disk table 1, the movable plate 50 is linearly moved in the direction of arrow C. As a result, the rack 53 meshes with the gear 5 of the bottomed cylindrical portion 4 of the disc table 1 to rotate the disc table l in the direction of arrow e, and the rack 54 meshes with the gear 25 of the rotating body 24. The rotating body 24 is rotated in the direction of arrow f (corresponding to the direction of arrow a in FIGS. 1 and 5). As a result, the rotating body 24 is driven to rotate with respect to the disk table 1, and the plurality of disk holding members 16 are rotated simultaneously and discretely, so that the disk 40 formed by the disk table l is rotated. Hold it on the mounting surface. in this case,
The bottomed cylindrical portion 4 and rotating body 24 of the disc table ■ are as follows:
Since the movable plate 50 is located within the through hole 55, the spindle 2 can be rotated without any hindrance.Then, from this state, the movable plate 50 moves straight in the direction of the arrow d. When moved and returned to their original positions, the disc table l and the rotating body 24 are each rotated in the opposite direction to the above case, and each disc holding member 16 is returned to the state shown in FIG. .

Effects of the Invention As is clear from the above description, in the disk holding device according to the present invention, the plurality of disk holding members that press and hold the disk against the disk mounting surface are rotated by the support mechanism on the disk table. The drive mechanism that rotates the plurality of disk holding members is disposed below the disk mounting surface. The disk can be held securely and firmly on the disk mounting surface, and the space required for its installation and operation is extremely small, so the disk player to which this is applied can be made smaller. become something that can be done. Furthermore, since the player to which the disc holding device according to the present invention is applied does not have a relatively costly member for holding the disc that is always located above the disc mounting surface, it is possible to use various disc loading methods. It becomes something that can be adopted.

Furthermore, in the disc holding device according to the present invention, since the presser for pressing the disc is not connected to the housing of the disc player, even if vibrations are applied to the housing,
This has the advantage that vibrations are not transmitted to the disk through the presser. Moreover, it is superior not only in terms of functionality but also in terms of design.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a disk holding device according to the present invention, FIG. 2 is an exploded perspective view of the example shown in FIG.
1. The figure is a sectional view taken along line I-1 in FIG. 2, and FIG. 4 is an enlarged partial perspective view for explaining the eccentric cam groove of the rotating body in the example shown in FIG. 5, 6, and 7 are partial plan views for explaining the operation of the example shown in FIG. 1, respectively. A perspective view and a sectional view. FIG. 8 is a perspective view showing an example of a driving means for rotating the rotating body in the example shown in FIG. In the figure, 1 is a disc table, 2 is a spindle, 3 is an annular thick part of the disc table 1, 4 is a bottomed cylindrical part of the disc table 1, 6 is a support shaft, 9 is a centering member,
16 is a disc pressing member, 17 is a disc pressing member 16
18 is a pin of the disk holding member 16, 20 is a holding fitting, 24 is a rotating body, and 27 is an eccentric cam groove. Figure 4 Figure 6 Procedural amendment April 16, 1980 1, Indication of the case 1982 Patent Application No. 21490 2, Title of the invention Disc holding device 3, Person making the amendment 4, Agent 〒150 8 , content of correction

Claims (1)

[Scope of Claims] (11 spindles, a disk table that forms a disk mounting surface and rotates integrally with the spindle, and a plurality of disk holders arranged around the rotational center of the disk table. and a support mechanism that supports each of the plurality of holding members so as to be rotatable in a plane substantially parallel to the disk mounting surface and linearly movable in a direction substantially perpendicular to the disk mounting surface. , the plurality of pressing members are arranged below the disk mounting surface in relation to the disk table, and each of the plurality of pressing members presses a disk placed on the disk mounting surface from above the disk mounting surface. A disk holding device comprising a drive mechanism that rotates and linearly moves in a predetermined direction so as to assume a first mode or a second mode that does not engage the disk. (2) The plurality of presser members. each includes a protrusion extending in a direction substantially perpendicular to the disk mounting surface, and the drive mechanism has an arcuate groove portion whose depth in the direction substantially perpendicular to the disk mounting surface changes and engages with the protrusion. The disk holding device according to claim 1, further comprising a rotating body provided with a plurality of eccentric cam grooves. (3) The disk table and the rotating body are arranged in opposite directions. 3. The disk holding device according to claim 2, wherein the disk holding device is arranged so as to be rotated.