JPH0264960A - Disk positioning device - Google Patents

Abstract

PURPOSE:To position the disks of different diameters to the loading center of a same tray without fail and to hold the loading of the disk by forming a core part, which is concentric with the center of a turn table and formed a center core fitting part in the almost same shape as the external shape of a center core on a positioning member and forming the core part to fit and support the edge of a disk central hole on another side. CONSTITUTION:For the compact disks or laser disks, etc., of the large diameter and small diameter, the outer diameters are respectively different, however, a central hole (d) has a common hole diameter. Accordingly, when the central hole (d) is fit to a central core part 222 of a disk positioning member 20 which is mounted to the correspondent position of a turn table 13 of a tray 11, the position of the central hole (d) is regulated along the almost cone-trapezoidal shape of the core part 222, fit and supported. Then, the center of a disk D1 is correctly positioned to the loading position center of the tray 11 and the turn table 13 is also correctly positioned to a center. Thus, the disks of the different diameters can be positioned, loaded and supported on the same tray 11 without fail.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a device for positioning a disc placed on a loading tray of a disc player, typically a compact disc (CD) player. This invention relates to a device that can easily and reliably center, position, and support several types of discs.

2. Description of the Related Art When a disc is loaded into or unloaded from a loading position in a horizontal loading type CD player, the disc is generally placed on a loading tray and transported along a loading path. The loading tray 1 is loaded with a disk D and moved from the front of the cabinet 10 to a disk loading position corresponding to a turntable located at the back of the cabinet, and is moved back in the opposite direction. Therefore, such a loading tray 1 is formed with a recessed portion having an inner diameter corresponding to the outer diameter of the disk in order to place the disk D while accurately centering it on the turntable. When a disk is aligned and placed in this recess, it is accurately centered on the turntable, and the disk is positioned relative to the loading position.

Incidentally, recently, in addition to CDs with a diameter of 12 cm, an extremely small CD with a diameter of 8 cm called a single CD has been commercialized. When loading and unloading a small-diameter CD with a diameter of 8 cm on a tray, it is difficult to simply form four parts with a size corresponding to the diameter of a large-diameter CD with a conventional diameter of 12 cm. It is not possible to accurately align the center of the turntable with the center of the turntable, nor can it be held securely without shifting.

Therefore, in a conventional CD player, when replacing several types of CDs with different diameters, such as a large diameter CD and a small diameter single CD, and trying to load and unload them using the same tray, as shown in FIG. As shown in FIG. 2, in addition to the disc storage recess 1a having a diameter corresponding to the diameter d1 of the large-diameter CD, the tray 1 has a diameter d2 of the small-diameter CD.
A disc storage recess 1b having a diameter corresponding to the size of the disc is formed at the same center, and the disc is accommodated and placed in the corresponding recess 1a or 1b depending on the diameter of the disc, or as shown in FIG. As shown, the tray 1 has only a recess 1a having a diameter corresponding to the diameter di of the large-diameter disk, and has an outer diameter corresponding to the diameter di of the recess 1a, and has a small-diameter disk inside. An adapter 3 with a recess 3a having a diameter corresponding to the diameter d2 is prepared as a separate component, and when a small diameter disc such as a single CD is to be placed on the tray, it is stored and placed in the recess 1a via the adapter 3. That's what I was doing. In this way, in the past, the same tray was used to accommodate several types of disks with different diameters.

Problems to be Solved by the Invention According to the conventional examples shown in FIGS. 5 and 6, single CD
When placing a small-diameter disk on a tray, such as the one shown in FIG.
In order to align the center and store it inside, it must be handled by hand, and since it has an extremely small diameter, it is very troublesome to handle it.

Therefore, it is not possible to easily align the recess 1b.
Alternatively, the disk D may be placed with its center shifted from the center of the disk 3a. Further, when the adapter 3 is used, the adapter 3 itself may be placed off center from the center of the recess 1a of the tray 1. If the disc D or the adapter is placed on the tray in a misaligned manner, the disc may slide off the recess in the tray during the loading or unloading process, or it may not be aligned accurately with the center of the turntable, making it difficult to ensure proper alignment. Loading errors may occur, such as not being able to perform proper loading and clamping operations.

If such a loading error occurs, it may cause damage to the disk and damage to the equipment. This is especially true for single CDs.
This can be said not only for small-diameter disks such as , but also for large-diameter disks.

Furthermore, according to each of the above-mentioned conventional examples, it is necessary to form several types of recesses with different diameters on the tray depending on the size of the disk diameter, or to prepare an adapter as a separate part, which makes it difficult to form recesses. This method is troublesome and has the drawback that the tray cannot be manufactured easily. Furthermore, when an adapter is used, it must be attached or removed each time depending on the diameter of the disk, which is very troublesome to handle.

This invention was proposed in view of the above points, and allows several types of disks with different sizes and diameters to be placed on the same tray without forming a recess on the tray or using an adapter as a separate part. The purpose is to easily and reliably align and place and hold the device without causing any center misalignment.

Means for Solving the Problems In order to achieve the above object, the present invention includes a disk positioning member that is rotatably mounted on a loading tray at a position corresponding to the turntable, and a disc positioning member that is attached to the positioning member concentrically with the center of the turntable. The connecting recess that is fitted and connected to the center core is formed to have approximately the same external shape as the center core, and a core portion that fits and supports the edge of the disk center hole is formed protruding from the other side. . The core portion is formed into a substantially truncated conical shape with a small tip end side.

The disk positioning member has two flange portions that sandwich the periphery of the mounting hole formed in the loading tray from the front and back, and a certain clearance is formed between the two flange portions and the surface of the periphery of the mounting hole. ing.

According to one configuration of the present invention, the disk positioning member includes a first member on the connection recess side and a second member on the core side, and these first and second members are formed by resin molding, It is integrally joined and attached to the periphery of the attachment hole of the tray.

Although the working single/l/CD, large diameter (12 cm) CD, LD (laser disk), etc. have different outer diameters, their central holes have a common hole diameter. Therefore, when the center hole is fitted to the center core part of the disk positioning member attached to the turntable corresponding position of the tray, the center hole is positioned, for example, following the substantially truncated cone shape of the core part, and is fitted and supported. Ru. As a result, the center of the disc is correctly aligned with the center of the placement position of the tray and the center of the turntable. Therefore, even if there are several types of disks with different diameters, there is no need to provide recesses of different sizes in the tray or use adapters as separate parts, and they can be positioned reliably and easily on the same tray. It can be supported in a vertical position. Also,
The fitting between the center hole and the core portion allows loading and unloading to be carried out reliably and firmly held without causing errors in loading or falling off the disk from the tray.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.

1 and 2 show a disk positioning device according to the present invention, and FIG. 3 shows a state in which a disk positioned and placed on a tray is loaded onto a turntable by the same device.

An opening window 10a is formed on the front surface of the cabinet 10. A disc loading tray 11 is mounted so as to be able to enter and exit in the front and rear directions through this opening window 10a. A spindle motor 12 for rotationally driving a disk is disposed at the lower part of the back inside of the opening window 10a of the cabinet 10. A turntable 13 is concentrically and rotatably supported on the shaft of a spindle motor 12. Turntable 12
A center core 14 is attached to the center of the upper surface. The center core 14 is formed in a truncated cone shape or a cone shape, and a recess 130 is formed in the center of the turntable.
It is fitted inside. The center core 14 has a spring 15
It is always urged in a direction to protrude upward from the top surface of the turntable.

Above the turntable 13 is a disc clamper 16.
is held by the arm 17 and supported so as to be rotatable in the vertical direction. The disc clamper 18 is freely rotatable with respect to the arm 17, and when a disc is loaded onto the turntable 13, it is pressed onto the turntable 13 from above and clamped. Also, with the unloading operation of the disc, it rises from the turntable 13.
Remove and release the clamp.

The loading tray 11 has a decorative plate 110 on the front surface having approximately the same shape as the opening window 10a of the cabinet 10, and has a circular mounting hole 111 formed in the center thereof corresponding to the turntable 13. The center of the attachment hole 111 corresponds to the central axes of the turntable 13 and the spindle motor 12 when the tray 11 is pulled deep into the cabinet.

An opening hole 112 is cut out continuously from the attachment hole 111 and extends to the rear end of the tray 11.

This opening hole 112 is provided for linearly reciprocating the optical pickup 18 disposed deep inside the rear of the turntable 13 in the disk radial direction without any trouble. Incidentally, the lifting and lowering operations of the loading tray 11 at the disk loading position and the accompanying loading operation of the disk onto the turntable 13 are performed by the operation of an elevation mechanism built into the apparatus. This Elm Page 8 mechanism not only raises and lowers the tray 11, but also holds the disc in the loading position on the tray 11, while the turntable 13 is moved up and down with the spindle motor 12. This also includes those that are moved.

A disk positioning member 20 is mounted in a mounting hole 111 formed in the center of the tray 11 so as to be freely rotatable with a certain clearance.

The disk positioning member 20 has a center axis that is aligned with the turntable 1 when the tray 11 is moved forward to the disk loading/unloading device.
It is assembled to the tray 11 so as to be concentric with the rotation center axis of the spindle motor 12 and the spindle motor 12. This disk positioning member 20 is formed by being divided into a first member 21 and a second member 22, and these members 21 and 22 are integrally joined by adhesive or the like and attached to the mounting hole 111 of the tray 11. It is assembled. The first and second members 21, 22 are each formed with a disk-shaped flange portion 211, 221 that sandwiches the periphery of the attachment hole 111 from the front and back at an interval.

Main body body and mounting hole 1 between clamp parts 211 and 221
A certain clearance is formed between the positioning member 20 and the inner surface of the tray 11, allowing the positioning member 20 to move freely and freely rotate with respect to the tray 11.

A connection recess 212 is formed in the first member 21 of the disk positioning member 20 to be fitted and connected to the center core 14 of the turntable 13 .

The connection recess 212 has an internal shape that is substantially the same as the core shape of the center core 14, and is formed into a substantially truncated conical inner surface. Through the fitting connection with the center core 14, the first member 21, that is, the disk positioning member 20, is integrally and rotatably connected to the turntable 13.

On the other hand, the second member 22 has a core portion 222 formed to protrude upward from the flange portion 221 . The core portion 222 is formed into an approximately truncated cone shape or a cone shape with a small diameter at the distal end and a large diameter at the base end. The core portion 222 fits and supports the edge of the center hole of the disk. By this fitting, the position of the center hole of the disk is regulated to follow the outer shape of the core portion 222, and the disk is centered at the center of the placement position of the tray 11. The outer diameter of the core portion 222 is smaller at the tip than the diameter of the center hole of the disk (and slightly larger at the base end).
Or set to the same diameter.

Next, the disk positioning operation of the apparatus configured as above will be explained.

First, the tray 11 protrudes from the front surface of the cabinet 10, and from the cane state where the disk D is taken out, for example, a single disk C.
When you want to load and set a small diameter disk DI called D, insert the center hole d into the core part 2 of the disk positioning member 20.
22 and press down, the center hole d will align with the core part 2.
22, and is aligned with the central axis of the core portion 222. When the outer periphery of the core portion 222 and the edge of the center hole d are engaged, the small diameter disk DI is centered at the center of the placement position of the tray 11 by the positioning member 20, and is held in position with respect to the loading position. In this way, by fitting the core portion 222 and the center hole d, the small diameter disk D1 is moved to the disk positioning member 2 as shown in FIG.
0 and is aligned and supported at the placement position of the tray 11.

In this state, when the tray 11 is pulled deep into the cabinet and moved forward by driving a loading motor (not shown), the disk DI is horizontally loaded into a loading position above the turntable 13.

When the tray 11 moves forward to the end in the loading direction deep inside the cabinet, the tray 11 moves through the positioning member 20.
The disk DI held at -L is positioned and stopped at a loading position directly above the turntable 13. Next, due to the operation of the elevation mechanism 30, the turntable 13 moves upward together with the spindle motor 12, and the force of the upward movement moves the center core 14 and the disk positioning member 20, as shown by the solid line in FIG. The connection recess 212 is fitted and connected with the center of the connection recess 212 aligned. At this time, the flange FX provided on the first member 21 of the positioning member 20
211 is brought into contact with the surface of the turntable 13. The disc DI is now placed on the turntable 13 via the positioning member 20. At the same time, disc clamper 1
6 is rotated in the direction of the turntable 13 on the other side via the arm 17 by the drive of a clamp motor (not shown), and the positioning member 20 moves the disk DI as shown by the solid line in FIG.
is pressed against the flange portion 221 provided on the second member 22 of. This pressing is performed by force, and the disk I) 1 is pressed against the turntable 13 via the positioning member 20, and is clamped and held. Now, small diameter disc D! The loading operation onto the turntable 13 is completed.

When ejecting and taking out the disc D1, the disc DI is unclamped by the reverse procedure and operation described above, and the turntable 13 returns to its lower position together with the spindle motor 12. At the same time, the disc clamper 16 is moved upwardly and detached from the turntable 13. Next, the tray 11 moves back to a state where it protrudes from the front surface of the cabinet with the disk Dl placed on it (FIGS. 1 and 2).

With the above steps, the loading/unloading operation of the small diameter disk D1 is completed.

Next, the disc player has a regular CI), that is, a disc D with a diameter of 12 cm, which is larger than a single CD.
2, both disks I and D2 have different outer diameters, but their center holes d have the same diameter. Therefore, as shown in FIG. 4, when the center hole d is fitted into the core part 222 of the disk positioning member 20 mounted on the tray 11 and pushed in, the center hole d follows the outer shape of the core part 222 and moves downward. The doll disk D2 is aligned with the center of the core portion 222 at the position where its outer circumference and the edge of the center hole d are engaged with each other, and the doll disk D2 is aligned with the center of the disk placement position of the tray 11 via the positioning member 20. be done. As a result, the large-diameter disk D2 is positioned and held on the tray 11 under the same conditions as the small-diameter disk DI described above. Thereafter, by the same procedure and operation as described above, the tray 11 moves to the back of the cabinet, returns and projects to the front, and the large-diameter disk D2 is loaded onto and removed from the turntable 13, and the loading/unloading operation is performed. It will be done. In this case, the large diameter disk D
2 and the small-diameter disk DI have the same center hole d, so by fitting and supporting the positioning member 20 through the core part 222 using the respective center holes d, they can be completely identical. It is possible to easily and reliably position and place the tray 11 at the placement position under certain conditions. In addition, not only CDs but also LDs with larger diameters can be easily and reliably positioned and mounted under the same conditions as long as the center hole diameter is the same. can.

In any of the above cases, the positioning member 20 moves the disc DI or 1) 2 onto the turntable 1.
3, a certain clearance is maintained with the hole edge of the mounting hole 111 of the tray 11, and a certain gap is maintained between the upper and lower two flanges 211 and 221 or the front and back surfaces of the peripheral edge of the mounting hole 111, respectively. Therefore, it does not come into contact with the tray 11, but is integrally joined to the turntable 13 by the fitting connection between the connection recess 212 and the center core 14, and can be rotated together with the disk I) 1 or D2 without any trouble.

As described above, according to the present invention, the positioning and centering of disks having different outer diameters can be reliably and easily performed simply by fitting the center hole into the core portion of the positioning member. Because the edge of the center hole and the outer periphery of the core are held together, the disk is firmly and securely held on the tray via the positioning member, so that the disk does not shift during the process of loading and unloading the disk. This eliminates the phenomenon of slipping or falling off, and it is possible to eliminate mounting errors caused by these.

In addition, it is no longer necessary to provide recesses with different diameters in the tray or to use adapters as separate parts, as in the past, and the tray can be made into a simple shape.
The complexity of mounting the disk and the troublesome handling can be eliminated.

Note that the disk positioning device according to the present invention can be widely applied to horizontal loading type disk players in general, in which disks of different sizes and diameters need to be replaced and loaded onto the tray t. For example, it is suitable for application to common type disc players in which it is necessary to replace and load several types of discs with different outer diameters, such as CD players compatible with CDs and single CDs, and disc players compatible with LDs and CDs.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the overall configuration of a disk positioning device according to the present invention, FIG. 2 is a sectional view taken along the line ■-■, and FIG.
The figure is a cross-sectional view showing how a disk positioned by a positioning member is loaded onto the turntable, FIG. 4 is a cross-sectional view showing the positioning operation of a large-diameter disk, FIG. 5 is a perspective view showing a conventional example, and FIG. is a perspective view showing the same conventional example. 11・ ・ 111・ 20・ φ 21・ ・ 22− ・ 211. 212・Loading tray, fist mounting hole, disk positioning member, first member, second member, 221・φ tatami flange, connection recess, 13・14・l 1 d・・・・・Core part, Φ・turntable, ・φ center core, D2...disc, ・disc center hole.

Claims (1)

[Scope of Claims] (1) A disk loading tray is installed at a disk loading position deep inside from the front of the cabinet so that it can be moved in and out horizontally in the front and back direction, and the loading tray can be moved forward or backward to the disk loading position. In the disc loading device that loads or takes out a disc placed on a tray onto or from a turntable by returning to the front of the cabinet, a disc positioning member is rotatably mounted on the loading tray at a position corresponding to the turntable. A connection recess is formed in this positioning member, which is concentric with the center of the turntable and is fitted and connected to the center core, and has a shape substantially the same as the core, and the edge of the disk center hole is fitted and supported on the other side. 1. A disk positioning device comprising a protruding core portion. (2) The disk positioning device according to claim (1), wherein the core portion is formed in a substantially truncated conical shape with a smaller diameter on the distal end side. (3) In claim (1) or (2), the disk positioning member has two flange portions that sandwich the periphery of the mounting hole formed in the loading tray from the front and back, and the two flange portions and the surface of the periphery of the mounting hole are provided. A disc positioning device characterized in that a certain clearance is formed between the disc positioning device and the disc positioning device. (4) In claim (1), (2) or (3), the disk positioning member is formed by a first member on the connection recess side and a second member on the core side, and the first member and Second
A disk positioning device characterized in that the members are integrally joined and mounted on the loading tray.