JP2831335B2 - Disk diameter changing device for disk-shaped recording media - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk by holding a disk-shaped recording medium such as an optical disk, a magneto-optical disk, and a magnetic disk on the inner peripheral side of an annular body. The present invention relates to an apparatus for changing the disk diameter of a disk-shaped recording medium, which can change the disk diameter of the disk-shaped recording medium. 2. Description of the Related Art Conventionally, an optical disk player which scans an optical disk on which a predetermined information signal is recorded without contacting a pickup device for reading the information signal to read and reproduce the information signal. Is used. In this type of disk player, the optical disk is sandwiched only by the center of the non-signal recording portion at the center by a disk table of a disk rotation drive device and a clamp member pressed against the disk mounting surface of the disk table. . This optical disc is rotated integrally with the disc table with the signal recording section facing the optical pickup device. In a disk player equipped with such a disk rotation drive device and a non-contact type optical pickup device, in order to accurately read and reproduce an information signal from an optical disk, a disk rotation drive device to which the optical disk is mounted is used. It is necessary that the relative positional relationship between the optical pickup device and the optical pickup device be accurately determined. Therefore, in this type of disc player, the disc rotation drive device is accurately positioned and supported on a chassis substrate provided in the player body, and the optical pickup device is accurately positioned and mounted on the chassis substrate. It is slidably supported on the guide shaft. [0005] A disk loading device for automatically mounting an optical disk used in a disk player on a disk rotation drive device is configured to transfer only the optical disk and mount it on the disk rotation drive device. Is common. A disc player provided with such a disc loading device is disclosed in Japanese Utility Model Laid-Open Publication No. 61-14536.
Japanese Unexamined Patent Application Publication No. 7-1995 and Japanese Unexamined Patent Application Publication No. 60-231966 are known. As shown in FIG. 8, the disc player disclosed in Japanese Utility Model Laid-Open Publication No. 61-145367 movably moves a disc transfer table 3 on which an optical disc 2 is placed inside and outside a player main body 1. Installed. Then, the disk transfer table 3 is transferred into the player main body 1 in the direction of arrow A in FIG. As shown in FIG. 10, the optical disk 2 housed and held in the disk drive 9 is transported to a position facing the disk table 9 of the disk rotation driving device 8 supported by the chassis substrate 7 in the player main body 1. And
By lowering the disk supporting member 3a that protrudes from the bottom surface of the annular concave portion 6 and supports the optical disk 2, which is provided to be vertically movable, the center hole 2a of the optical disk 2 is aligned with the center of the disk table 9, and Place on top. Following the mounting of the optical disk 2 on the disk table 9, the chucking arm 11 is moved to the position shown in FIG.
By rotating the disk table 9 in the direction of the middle arrow X, the disk clamper 12 attached to the tip of the chucking arm 11 is pressed on the optical disk 2, and the optical disk 2 can be rotated integrally with the disk table 9. Hold. The optical pickup device 14 slidably supported by the guide shafts 13 mounted on the chassis substrate 7 faces the optical disk 2 held on the disk table 9. As described above, in the disk loading apparatus of the type in which the optical disk 2 is held on the disk transfer table 3 which is movable with respect to the player main body 1 and is mounted on the disk table 9 in the player main body 1, In order to mount the optical disk 2 to the table 9 accurately and reliably, it is necessary that the holding position of the optical disk 2 is regulated and held on the disk transfer table 3. Accordingly, an annular recess 6 formed in the disk transport table 3 is made the diameter R ₄ corresponding to Ban径R ₃ of the optical disc 2 held here, the optical disk 2 by the rising circumferential wall 6a of the annular recess 6
The holding position is regulated by supporting the outer peripheral surface 2a of the rim. A disc player disclosed in Japanese Patent Application Laid-Open No. 60-231966 has a structure as shown in FIG.
A disc insertion slot 16 is provided in the player main body 15, and a loading arm 1 rotatably supported by a frame 17 near the disc insertion slot 16 as shown in FIG.
A movable guide plate 19 and a fixed guide plate 20 are disposed to face the movable guide plate 19 via the interposition of the movable guide plates 8 and 18. The optical disk 2 is inserted into the player main body 15 through a gap formed between the guide plates 19 and 20, and the center portion has a small diameter at a position for receiving the optical disk 2 inserted through the gap. A pair of fixed-side rollers 21 and drive-side rollers 22, which are formed so as to gradually increase in diameter toward the portion, are arranged. Then, the optical disk 2 is nipped by these rollers 21 and 22, and the driving side roller 22 is rotated by a driving motor 24 via a driving gear mechanism 23, so that the rotation disposed in the player main body 15 as shown in FIG. It is configured to be transferred onto the disk table 9 of the drive device 8. In the above-described disk player, when the optical disk 2 is transferred onto the disk table 9, the loading arms 18, 18 are rotated to lower the drive roller 22 and the movable guide plate 19, thereby causing the optical disk 2 to move downward. Is mounted on the disk table 9 such that the center hole 2 a of the disk table 9 is aligned with the center of the disk table 9. Further, following the operation of lowering the optical disk 2, the chucking arm 11 is rotated, and the disk clamper 12 at the tip is pressed on the optical disk 2, and the optical disk 2 is held rotatably integrally with the disk table 9. . Although the optical disk is not automatically held on the disk table as in the above-described disk player, a disk clamper is mounted opposite to the disk table of the disk rotation driving device provided in the player body. The lid is rotatably mounted, a disk support member is provided on the lid, the optical disk is supported by the disk support member, and the optical disk is clamped to the disk table by rotating the lid. Disc players are used. In this disk player, the disk support member provided on the lid is provided at a position corresponding to the outer peripheral portion of the optical disk so that the center hole of the optical disk and the center of the disk table coincide with each other. The optical disk is supported by taking out the optical disk. The above-mentioned disk players are based on the premise that a standard-size optical disk having a certain unified board diameter is used. The disc player disclosed in Japanese Utility Model Laid-Open Publication No. 61-145367 has a disc transfer table 3.
The outer peripheral surface 2a of the optical disk 2 is supported by the rising peripheral wall 6a of the annular concave portion 6 formed so as to be aligned with the disk table 9, so that a disk other than the optical disk 2 that fits the annular concave portion 6 is held at a constant level. It cannot be transported in a restricted position. Therefore, it is not possible to mount a disk of a different diameter on the disk table 9 in a centered manner, and the clamp by the disk clamper 12 cannot be performed, thereby making it impossible to rotate the disk. The disc player disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 60-231966 has a disc insertion slot 1
6, the optical disk 2 inserted from a pair of fixed side rollers 2
Player body 1 while being held between
5 so as to be mounted on the disk table 9 inside the disk 5. In the case of disks having different diameters other than a fixed size, the disk does not have the same transfer stroke when transferred, so that the disk and the disk cannot be moved. The centering with the table 9 cannot be achieved, the clamp by the disk clamper 12 cannot be performed, and the rotation operation of the disk becomes impossible. Further, in the above-mentioned disc player in which a lid is rotatably mounted on the player main body, the optical disc is held by the lid and mounted on a disc table, the outer peripheral end of the optical disc is supported and the optical disc is connected to the disc. Since it is used for positioning with a disc player,
Since an optical disk having a different diameter cannot be mounted on the disk table and clamped by the disk clamper, the rotation operation of the optical disk becomes impossible. Meanwhile, there has been proposed an optical disc having a different diameter having a different size depending on the amount of information to be recorded. That is, since an optical disc can record an extremely large amount of information signals, for example, when only one or two songs are recorded, a signal recording area becomes large and becomes a blank portion. Therefore, a small-diameter optical disk has been proposed in order to make effective use of the disk material, to enable easy handling, and to adapt to the amount of information to be recorded. However, as described above, such a small-diameter optical disc cannot be loaded by a disc player which has been widely used in the past, and as a result, the recorded information signal must be reproduced. There is a problem that can not be. Accordingly, an object of the present invention is to enable the same handling as a disc-shaped recording medium of a fixed size, even if the diameter of the disc-shaped recording medium is smaller than a disc-shaped recording medium having a unified fixed outer diameter. It is an object of the present invention to provide a panel diameter changing device which enables a loading operation to a recording / reproducing apparatus such as a disk player which has been widely used in the past, and facilitates a mounting operation of a disk-shaped recording medium. According to the present invention, there is provided an apparatus for changing the disk diameter of a circular recording medium according to the present invention, wherein the disk recording medium is inserted on the inner peripheral side in order to achieve the above object. A hole is provided, and an annularly-shaped holding body having a thickness substantially equal to the thickness of the disc-shaped recording medium inserted into the insertion hole, and formed on the periphery of the insertion hole of the holding body, Holding means for holding an outer peripheral portion of the disc-shaped recording medium inserted into the insertion hole . At least one of the holding units has an engaging portion that engages with an outer peripheral portion of the disc-shaped recording medium inserted into the insertion hole, and a supporting portion that supports the holding member so as to be elastically displaceable in a radial direction. Having other holding means
Is a first support piece that supports one surface of the disc-shaped recording medium protruding from the periphery of the insertion hole of the holder and supports the other surface of the disc-shaped recording medium. With the second support piece
And the first and second support pieces are provided so as to be shifted from each other so as not to face each other. Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the apparatus for changing the board diameter of the present embodiment has a board diameter R ₃ of the above-mentioned standard size optical disc 2 which is a so-called compact disc having a widely used board diameter. and a annular member 61 having the same outer diameter R _1. The annular body 61 is made of rigid ABS.
It is formed of a synthetic resin such as a resin, and has substantially the same thickness as the standard size optical disc 2. Then, the inner peripheral side, as shown in FIG. 1, a disk fitting hole 62 which the small-diameter disk 26 is fitted with a Ban径R ₂ of smaller diameter than the optical disk of the unified standard size are formed. As shown in FIGS. 1 and 2, when the small-diameter disk 26 is fitted into the fitting hole 62, one main surface 61a of the small-diameter disk 26 on the periphery of the fitting hole 62 faces the signal recording surface 26b. A support tongue piece 63 that constitutes a first support piece that supports the outer peripheral portion 26a of the small-diameter disk 26 protrudes from the side. The support tongue 63 is made sufficiently thinner than the annular body 61 and protrudes with a width that supports only the non-signal recording portion of the outer peripheral portion 26 a of the small-diameter disk 26. Further, the fitting hole 62
The peripheral edge of the support tongue piece 63 is separated from the main surface 61b opposite to the side on which the support tongue piece 63 protrudes at two places at a predetermined interval in the circumferential direction of the fitting hole 62. In addition, pressing support tongue pieces 64, 64 constituting a second support piece for pressing and supporting the outer peripheral portion 26a of the small-diameter disk 26 are protruded.
These pressing support tongue pieces 64, 64 have a width substantially the same as that of the support tongue piece 63, and protrude from the inner peripheral side of the fitting hole 62 as shown in FIG. Further, the pressing support tongue 6 of the support tongue 63
The portions corresponding to the positions where the projections 4 and 64 are provided are cutouts 65 and 65 in order to secure the direction in which the mold is removed when the pressing support tongues 64 and 64 are formed. That is,
The support tongue 63 and the pressing support tongues 64, 64
1 are formed so as to be shifted in position so as not to face each other in the circumferential direction. Further, on the periphery of the fitting hole 62 of the annular body 61, the diameter of the annular body 61 is formed integrally with the annular body 61 so as to be equidistant from the pressing support tongue pieces 64, 64. A disk holding portion 66 that is elastically displaceable in the direction is formed. The disc holding portion 66 has a pair of cuts 67, 68 formed at predetermined intervals from the disc fitting hole 62 toward the middle of the annular body 61, and ends of the cuts 67, 68. By forming a circumferential slit 69 in the vicinity, the annular slit 61 is integrally formed in the annular body 61. The circumferential direction slit 69 is continuous with a central slit portion 69a in which a central slit portion 69a is bulged to the outer peripheral side of the annular body 61, and a position facing both ends of the cuts 67 and 68 from both ends of the central slit 69a. The slits 69b and 69c are formed so as to bulge out toward the disc fitting hole 62 in the opposite direction.
The disk holding portion 66 formed by forming the circumferential slit 69 has a central wide portion 6.
6a is supported by a pair of narrow continuous arm portions 66b and 66c, and the continuous arm portions 66b and 66c are used as elastic displacement portions. That is, the annular body 61
Are supported so that they can be elastically displaced toward the center direction. The wide portion 66 of the disk holding portion 66
As shown in FIG. 2, a disk pressing support piece 70 for pressing and supporting the outer peripheral portion 26a of the small-diameter disk 26 from the other main surface 61b side of the annular body 61 at the side edge of the disk fitting hole 62 side of FIG. Are protruded from the disc fitting hole 62 side. The distance from the center of the annular body 61 to the disk pressing support piece 70 is smaller than the radius of the small diameter disk 26 by about the gap between the circumferential slits 69. In addition, wide part 6
On the other main surface 61b side of 6a, a finger hook portion 71 formed of a concave groove is provided so as to easily perform an operation for elastically displacing the disk holding portion 66 so as to expand the diameter when the small diameter disk 26 is fitted. Are formed. Further, the disk holding portion 6 of the annular body 61
6, a pair of continuous arm portions 66 between the wide portion 66a and the narrow portion.
One main surface 61a side portion extending between b and 66c is cut out so as to make the disk holding portion 66 thin. A small-diameter disk 26 is mounted on the annular body 61 at a circumferential slit 69 corresponding to the cutout portion, and a step for closing the circumferential slit 69 when the disk holding portion 66 is elastically displaced. As shown in FIG. 4, the projection 72 protrudes from the annular body 61 side. Further, at the portions where the cuts 67 and 68 are formed, closing tongues 73 and 73 for preventing the laser beam from passing through the cuts 67 and 68 are provided.
As shown in FIG. 5, the disc holding portion 66 is provided so as to protrude from one of the main surfaces 61a of the annular body 61 from the roots of the continuous arms 66b and 66c to the cuts 67 and 68. By protruding the closing tongue pieces 73, 73, the continuous arm section 66 of the disc holding section 66 is provided.
In order to prevent the elastic displacement of the b and 66c from being hindered, a slot 74 is formed so as to divide the continuous arm portions 66b and 66c and the closing tongue pieces 73 and 73 as shown in FIG. In order to clearly indicate the mounting direction of the small-diameter disk 26, an annular body 6
One of the main surfaces 61a is a mirror surface having the same appearance as the signal recording surface 26b of the small-diameter disk 26, and the other main surface 61b is used for printing handling instructions and the like in the same manner as the other surface 26c of the small-diameter disk 26. Printing surface 41b. The mounting operation of the small-diameter disk 26 to the disk diameter changing device formed as described above is performed by one main surface 61a of the annular body 61 and the signal recording surface 26b of the small-diameter disk 26.
The outer peripheral portion 26a of the small-diameter disk 26 is placed on the supporting tongue 63, and the other surface of the small-diameter disk 26 is pressed and supported by the pressing tongues 64, 64. 62. Next, after the small-diameter disk 26 is fitted into the disk fitting hole 62 by elastically displacing the disk holding portion 66 so as to expand the diameter, the disk holding portion 66 is elastically returned, and the support tongue piece 63 and the pressing support tongue are formed. The pieces 64, 64 and the disc pressing support piece 70 are used to hold the same. Then, as shown in FIGS. 6 and 7,
The small-diameter disk 26 is equivalent to a disk having the same disk diameter as a standard-size optical disk having a unified disk diameter size integrated with the annular body 61, and can be handled in the same manner as the optical disk. In the above-described embodiment, an example of an optical disk has been described. However, the present invention is not limited to the above-described optical disk, and it is necessary to unify the disk diameter as a disk having a constant unified disk diameter. It can be widely applied to magneto-optical disks, magnetic disks, and the like. The outer diameter of the annular body and the diameter of the disc fitting hole can be appropriately changed according to the unified disc diameter and the disc diameter of the disc to be held. As described above, according to the present invention, a disc-shaped recording medium having a different diameter is held on the inner peripheral side of an annular body having a uniform outer diameter. Since the recording medium of the same diameter can be made the same as the recording medium of the unified board diameter, even a disc-shaped recording medium of a small diameter by a board diameter changing device having a unified constant outer diameter size,
The same handling as a disc-shaped recording medium of a certain size is made possible, and a loading operation to a conventionally widely used disc player becomes possible. In particular, the disc diameter changing device according to the present invention is a holding means having an engaging portion for engaging with an outer peripheral portion of a disc-shaped recording medium.
Is elastically displaced in the radial direction of the holder, and each surface of the disc-shaped recording medium
The first and second support pieces that respectively support
Since the disc-shaped recording medium is provided so as not to be displaced, the mounting operation of the disc-shaped recording medium on the holding body is facilitated, and further, by deforming only the holding means without deforming the holding body, Since the loading and unloading can be performed, the disk-shaped recording medium can be integrated and held on the holding member with high precision.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a panel diameter changing device according to the present invention. FIG. 2 is an enlarged sectional view taken along a line EE of FIG. 1; FIG. 3 is an enlarged sectional view taken along line FF of FIG. 1; FIG. 4 is an enlarged sectional view taken along line GG of FIG. 1; FIG. 5 is an enlarged sectional view taken along line HH of FIG. 1; FIG. 6 is a plan view showing a state in which a small-diameter disc is held by the board diameter changing device. FIG. 7 is an enlarged sectional view taken along a line II of FIG. 6; FIG. 8 is an overall perspective view of a disc player provided with a disc transfer table. FIG. 9 is a plan view showing an internal mechanism of the disc player. FIG. 10 is a side view showing a clamp operation state of the optical disc. FIG. 11 is an overall perspective view of a disc player in which an optical disc is loaded by a pair of rollers. FIG. 12 is a perspective view showing an internal mechanism of the disc player. FIG. 13 is a plan view showing a loading operation state of the optical disc. [Explanation of Signs] 26: Small-diameter disk, 61: Annular body, 6
6... A disk holding unit serving as a disk holding means;
3 ... a support tongue piece as a first support piece, 64 ... a second support piece 66 ... a disk holding part.

Claims (1)

(57) [Claims] An insertion hole into which a disc-shaped recording medium is inserted is provided on the inner peripheral side, and a ring-shaped holding body having a thickness substantially equal to the thickness of the disc-shaped recording medium inserted into the insertion hole, Holding means for holding an outer peripheral portion of the disc-shaped recording medium inserted into the insertion hole, the holding means being inserted into the insertion hole. An engaging portion that engages with the outer peripheral portion of the disc-shaped recording medium, and a supporting portion that supports the holding member so as to be elastically displaceable in a radial direction of the holding member. Protruding from the periphery of the hole
First supporting one surface of the issued the disc-shaped recording medium
And a second supporting member for supporting the other surface of the disc-shaped recording medium .
And a second support piece, board size changes of the disc-shaped recording medium in which the first and second support piece is characterized in that is provided by shifting the positions so as not to face each other <br/> apparatus.