JPH0510269Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The invention is provided in a disk player, etc.
The present invention relates to a disk holding device that holds a disk so as to rotate it.

(Summary of the invention) The present invention includes a rotating disk support member that is provided with a disk table portion on which the disk is placed and is fixed to a rotating shaft, and an inclined outer circumferential surface portion that engages with the central hole of the disk. A disk centering member that is movable in the direction along the axis,
In a disk holding device disposed with an elastic member interposed between them, the elastic member interposed between the rotating disk supporting member and the disk centering member is connected to the rotating disk supporting member and the disk centering member. It is formed integrally with one of the rotary disk support member and the disk centering member, extends from one of the rotary disk support member and the disk centering member toward the other, and its tip portion contacts the other of the rotary disk support member and the disk centering member. By making the parts in contact with each other, it is possible to reduce the number of parts and facilitate assembly.

(Prior Art) In a disk player, a disk serving as an information recording medium is mounted on a disk holding device and rotated at a predetermined rotational speed, and information is recorded or recorded on a recording track portion of the rotating disk. The information recorded in the recording track section is reproduced. The disk holding device usually has a rotating disk support member that has an annular disk table portion on which the disk is placed and is fixed to a rotating shaft, and an inclined outer circumferential surface portion that engages with the central hole of the disk. The disk centering member is disposed inside the annular disk table portion and is movable in the direction along the rotation axis.The disk is attached to the disk holding device by inserting the disk into the center hole. The disc centering member is engaged with the inclined outer circumferential surface of the disc centering member and placed on the disc table part, and is fixed onto the disc table part by a disc chucking device disposed at a position opposite to the disc holding device. It is done.

As disclosed in, for example, Japanese Utility Model Application Publication No. 61-90054, a disk holding device installed in such a disk player has a central portion fixed to a rotating shaft, and an annular disk surrounding the central portion. A disk centering member having an inclined outer circumferential surface is inserted into the rotating shaft at its center, and a spring member is interposed in the center of the disk supporting member. The disk centering member is supported by the spring member, and the disk centering member can be moved in a direction along the rotation axis by expansion and contraction of the spring member. Something has been proposed.

FIG. 4 shows a conventional disk holding device in which a spring member is interposed between a rotating disk supporting member and a disk centering member arranged in relation to a rotating shaft, as shown in the above-mentioned publication. The figure shows the state in which the disk is installed. In FIG. 4, the disk D engaged with the disk holding device 2 is moved to the disk chucking device 8.
It is fixed on the disk holding device 2 by. The disk holding device 2 includes a rotating shaft 3, a disk centering member whose center portion is fitted into the rotating shaft 3, is movable in a direction along the rotating shaft 3, and has an inclined outer circumferential surface portion 4a; A central portion 5a is fixed at a position below the disk centering member 4 on the shaft 3, and the central portion 5a
A disk support member 5 is provided with an annular disk center ring portion 5b that surrounds the disk center ring member 4, and a compressed disk is provided between the disk center ring member 4 and the center portion 5a of the disk support member 5. The coil spring 6 is equipped with a coil spring 6. A stopper 7 for regulating the position of the disk centering member 4 is attached to the upper end of the rotating shaft 3.

Under such a configuration, the disk centering member 4 is always urged and supported toward the stopper by the coil spring 6.
It moves along the axis of rotation 3 as it expands and contracts.

The center hole Da of the disk D is engaged with the inclined outer circumferential surface 4a of the disk center ring member 4, and the disk center ring member 4 is slightly lowered against the biasing force of the coil spring 6, thereby forming a disk table portion. 5b. Then, it is pressed toward the disk table portion 5b by the disk pressing surface portion 8a of the disk chucking device 8 disposed opposite to the disk holding device 2, and is fixed onto the disk holding device 2.

(Problems to be Solved by the Invention) As described above, in the conventional disk holding device, there is
An independent spring member, such as the coil spring 6 shown in FIG. A configuration is adopted in which the position of the disk centering member that is attached and biased by a spring member is regulated. For this reason, the conventional disk holding device has a large number of parts that form the disk holding device, and during assembly,
A work is required to attach the rotating disk supporting member and the disk centering member to the rotating shaft with a compressed spring member interposed between them.
Therefore, it has the disadvantage that it is difficult to assemble.

In view of these points, the present invention has a rotary disk support member that has a disk table portion, is fixed to a rotating shaft, and has an inclined outer circumferential surface portion that engages with the central hole of the disk, and is fitted onto the rotating shaft. and a disk centering member which is movable in the direction along the rotational axis, and an elastic member is interposed between the two, and the number of parts is reduced and the number of parts is reduced and the assembly is easy. It is an object of the present invention to provide a disk holding device that can perform the following functions.

(Means for solving the problem) In order to achieve the above-mentioned object, the disk holding device according to the present invention includes a rotating shaft, a central portion fixed to the rotating shaft, and a disk placed around the central portion. a rotary disk support member provided with a disk table portion to be rotated; and a center portion of the rotary disk support member that is fitted with the rotation shaft so that the rotary disk support member faces the center portion of the rotary disk support member and is movable in a direction along the rotation axis. , a disk centering member having an inclined outer circumferential surface portion formed around the center portion to engage with the central hole of the disk, and further comprising a rotating disk supporting member and a rotating disk supporting member between the disk centering member and the rotating disk supporting member It is integrally formed with one of the rotary disk support member and the disk center ring member, extends from one of the rotary disk support member and the disk center ring member toward the other, and has a distal end portion connected to the other of the rotary disk support member and the disk center ring member. It is configured to include an elastic member that is brought into contact with the elastic member.

(Function) In the disk holding device according to the present invention configured as described above, between the disk centering member and the rotating disk supporting member, the disk holding device is integrally formed with one of the rotating disk supporting member and the rotating disk centering member. Due to the elastic member,
The disk centering member is biased and supported in a direction along the rotation axis. The elastic member interposed between the disk centering member and the rotating disk supporting member is not an independent component but is formed integrally with one of the rotating disk supporting member and the disk centering member. Therefore, the number of parts can be reduced and assembly can be facilitated.

(Example) FIG. 1 shows an example of a disk holding device according to the present invention.

In this example, a rotating shaft 13 that is rotationally driven by a motor 11 is provided, and this rotating shaft 13
A rotary shaft disk support member 15 is attached to the rotary shaft disk support member 15, and a disk centering member 17 is engaged with the rotating shaft disk support member 15. Rotating shaft disk support member 1
5 is, for example, integrally molded from plastic, and its central portion 15a is fixed to the rotating shaft 13 so that the whole rotates together with the rotating shaft 13. There is an annular disk table portion 1 surrounding the disk centering member 17 connected to a flat portion 15b extending outward from the central portion 15a.
5c is provided. A plurality of through holes 19 are formed at predetermined positions in the flat portion 15b.

On the other hand, the disk centering member 17 is, like the rotary disk support member 15, integrally formed of, for example, plastic.
The center portion 17a is the rotary disk support member 1
5 is fitted onto the rotating shaft 13 above the flat portion 15b of the rotary disk support member 15, and is disposed inside the annular disk table portion 15c of the rotating disk support member 15 in a state where the entire body is movable along the rotating shaft 13. ing. An inclined outer circumferential surface portion 17b that engages with the center hole of the disk is formed on the upper surface side of the disk centering member 17, and a plurality of locking pieces 21 and elastic pieces 2 are formed on the lower surface side.
3 is the flat part 15b of the rotary disk support member 15
It is made to protrude to the side. A plurality of locking pieces 21
Each of the flat portions 1 of the rotary disk support member 15
It passes through a through hole 19 formed at a predetermined position of 5b, and its tip portion is formed in a hook shape,
It is supposed to engage with the lower surface of the flat portion 15b. Further, each of the plurality of elastic pieces 23 is formed integrally with the disk centering member 17,
It has a predetermined elasticity, and extends toward the flat part 15 of the rotary disk support member 15, with its tip abutting against the upper surface of the flat part 15b.

Then, each elastic piece 23 is curved so that the hook-shaped tip of each locking piece 21 engages with the lower surface of the plane 15b of the rotary disk support member 15. Its length is selected so that it comes into contact with the upper surface of 15b.
Therefore, each elastic piece 23 is connected to the flat surface 15b of the rotary disk support member 15 fixed to the rotary shaft 13.
At the top, the disk centering member 17 exerts an action of urging the disk centering member 17 in a direction of pushing it up along the rotating shaft 13, and receives the urging force from the elastic piece part 23. The position of the rotary disk support member 15 is regulated by the distal end portion thereof engaging with the lower surface of the flat portion 15b of the rotary disk support member 15. In this way, each of the plurality of elastic pieces 23 is disposed between the rotary disk support member 15 and the disk center ring member 17, and biases the disk center ring member 17 in the direction along the rotation axis 13. The disk centering member 17 forms elastic pieces for support, and can move up and down along the rotating shaft 13 with elastic deformation of each elastic piece 23.

FIG. 2 shows a state in which a disk D is attached to the example shown in FIG. 1 described above. In this state, the center hole Da of the disk D is engaged with the inclined outer peripheral surface portion 17b of the disk centering member 17, and the disk D is brought into contact with the inclined outer peripheral surface portion 17b of the disk centering member 17.
7 is lowered along the rotary shaft 13 against the biasing force of each elastic piece 23, and is placed on the disk table portion 15c of the rotary shaft disk support member 15. Then, the disk table part 15c and the disk center ring member 17
a disk pressing surface portion 8a of the disk chucking device 8 disposed opposite to them on the upper surface side;
As a result, it is pressed toward the disk table portion 15c and fixed onto the disk table portion 15c.

The disk D fixed on the disk table portion 15c in this way has its rotating shaft 13 connected to the motor 1.
1, and the entire rotary disk support member 15 rotates at a predetermined rotational speed.

FIG. 3 shows another example of the disk holding device according to the present invention.

In FIG. 3, parts or members corresponding to those shown in FIG. 1 are designated by the same reference numerals as in FIG. 1.

In this example, the disk centering member 1 corresponds to the elastic piece 23 shown in FIG.
There is no elastic piece protruding from the lower surface side of the rotary disk support member 15 toward the flat portion 15b of the rotary disk support member 15; instead, the flat portion 15b of the rotary disk support member 15
A plurality of elastic pieces 23' are provided that protrude from the upper surface to the lower surface side of the disk centering member 17. Each of these plurality of elastic pieces 23' is
It is formed integrally with the flat part 15b of the rotary disk support member 15, has a predetermined elasticity, and extends toward the disk center ring member 17, with its tip portion coming into contact with the lower surface of the disk center ring member 17. It is said that

Each elastic piece 23' protrudes from the lower surface side of the disk centering member 17, and the hook-shaped portion of each locking piece 21 passes through the through hole 19 formed in the flat surface 15b of the rotary disk support member 15. The tip portion is the flat portion 15b of the rotary disk support member 15.
When engaged with the lower surface of the disk centering member 1, the tip thereof is curved and
Its length is selected so that it comes into contact with the lower surface of 7. Therefore, each elastic piece 23' urges the disk centering member 17 on the flat surface 15b of the rotating disk support member 15 fixed to the rotating shaft 13 in a direction to push it up along the rotating shaft 13. The disk centering member 1 exerts an action and is biased by the elastic piece portion 23'.
7 is regulated in position by the hook-shaped tip portion of the locking piece portion 21 engaging with the lower surface of the flat portion 15b of the rotary disk support member 15. In this way, each of the plurality of elastic pieces 23' also supports the rotary disk support member 15 and the disk centering member 1.
7 to form an elastic member that biases and supports the disk centering member 17 in the direction along the rotation axis 13. The disk centering member 17
It can move up and down along the rotating shaft 13 with elastic deformation at 3'.

(Effect of the invention) As is clear from the above explanation, in the disk holding device according to the present invention, the rotating disk supporting member fixed to the rotating shaft and the disk center engaged movably along the rotating shaft. Between the ring members, the elastic member that plays the role of urging and supporting the disk centering member in the direction along the rotational axis is not an independent component, but is included among the rotating disk support member and the disk centering member. Since it is integrally formed with one side of the disc, the number of parts is reduced without any deterioration of the disk holding function, which provides an advantage in terms of manufacturing costs and facilitates assembly. It turns out.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of a disk holding device according to the present invention, Fig. 2 is a sectional view showing a state in which a disk is attached to the example shown in Fig. 1, and Fig. 3 is a sectional view showing an example of a disk holding device according to the present invention. FIG. 4 is a sectional view showing another example of the device, and FIG. 4 is a sectional view showing a state in which a disk is attached to a conventional disk holding device. In the figure, 13 is a rotating shaft, 15 is a rotating disk support member, 15c is a disk table portion, 17 is a disk centering member, and 23 and 23' are elastic pieces.

Claims (1)

[Claims for Utility Model Registration] A rotating shaft; a rotating disk support member having a central portion fixed to the rotating shaft and provided with a disk table portion on which the disk is placed around the central portion; and the rotating shaft. a slanted surface, the central portion of which is fitted into the rotary disk supporting member, is arranged to face the central portion of the rotary disk support member and to be movable in a direction along the rotational axis, and is disposed around the central portion and engages with the central hole of the disk; a disk centering member having an outer peripheral surface formed thereon; and a disk centering member integrally formed with one of the rotating disk supporting member and the disk centering member, and supporting the rotating disk between the disk centering member and the rotating disk supporting member. an elastic member extending from one of the rotary disk support member and the disk centering member toward the other, and whose tip portion corresponds to the other of the rotary disk support member and the disk centering member. Disc holding device.