JPH01211339A - Optical disc stabilizing ring - Google Patents

Abstract

PURPOSE: To mechanically stabilize an optical disk for the purpose of improving recording and reproducing performance by providing a ring-shaped circular body in a stabilizing ring, giving a uniform mass distribution along the circumferential direction, and attaching the body of the stabilizing ring adjacently to the outer edge of the optical disk with an attaching means. CONSTITUTION: The stabilizing ring 10 is provided with a circular outer edge part 14, circular inner edge part 16, upper face 18 and a lower face 20. A positioning device 30 is equipped with a hub 34 having a circular outer edge part 36; with the stabilizing ring 10 placed around the outer edge 36 of the positioning device 30, the stabilizing ring 10 is arranged concentrically with a compact disk 12. After the stabilizing ring 10 and the compact disk 12 are matched concentrically, the stabilizing ring 10 is arranged on the nonworking face of the compact disk 12, fixed to it adjacently to the outer edge 28 of the compact disk 12, and held firmly with an adhesive at a prescribed position. As a result, the optical disk is mechanically stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an optical disc, and more particularly to a stabilizing ring for mechanically stabilizing an optical disc to improve recording and playback performance.

[Background of the invention]

An optical disc is an information storage device that is read by a laser beam when it is rotated at high speed in an optical disc player. Although reference is made to compact discs used for audio recording, the invention described herein can be applied to any optical disc. Compact discs are made of polyurethane resin. Due to the nature of the material, compact discs have an uneven weight distribution. As a result, the compact disc suffers from rotational tilt or vertical fluctuations when subjected to the high rotational speeds of the compact disc player.

Since this rotational tilt increases the amount of movement, a Sanibo device must be used to correct positioning errors, and this rotational tilt also causes the output of the compact disc player to
Produces distortion that interferes with audio playback.

The device for stopping the rotational tilt consists of a disk made of glass fiber material having approximately the same dimensions and shape as a compact disk. When the compact disc is loaded into a compact disc player, this brake disc is placed on the non-working (top) side of the compact disc and is held in place by the compact disc player's clamping mechanism. The disadvantage of this method is that the brake disc is not fixed to the compact disc and is subject to misalignment when rotating, thus causing its own rotational tilt.
Another drawback is that the brake disc may interfere with the compact disc player's clamping mechanism and may interfere with operation of the compact disc player or cause damage to the compact disc player. Furthermore, this method does not prevent rotational tilt, but only weakens rotational tilt, thus distorting the output of the compact disc player. The present invention overcomes these and other drawbacks.

SUMMARY OF THE INVENTION The present invention provides a stabilizing ring for optical discs, such as audio compact discs. The stabilization ring has a ring-shaped circular body and has a uniform mass distribution along the circumference. Attachment means attach the body of the stabilizing ring adjacent the outer edge of the optical disc. Preferably, the body has an outer diameter approximately equal to the outer diameter of the optical disc.

According to another aspect of the invention, the body of the stabilizing ring is 2.0
It has 3.6 grams of txt.

According to another aspect of the invention, the body of the stabilizing ring is approximately zero
．． It has a uniform thickness of 79wm (1/32inch). In addition, the body has a width less than half the outer diameter of the optical disc, preferably approximately 6,35 m (
It has a width of 1/4 inch).

According to yet another aspect of the invention, the attachment means preferably include an adhesive formed on one side of the body.

Alternatively, the attachment means may be constructed by integrally forming the body of the stabilizing ring and the optical disc.

According to another aspect of the invention, a positioning device is provided for use in positioning a stabilization ring on a compact disc. The positioning device includes a hub having a circular outer edge with an outer diameter approximately equal to the diameter of the inner edge of the stabilization ring. A protruding portion is formed in the center of the hub to align the circular outer edge of the hub concentrically with the optical disc when the hub is placed around the circular outer edge, thus placing the stabilizing ring around the circular outer edge. When the stabilization ring is aligned concentrically with the optical disc.

According to another aspect of the invention, the hub of the positioning device has a stepped portion projecting from the outer edge for supporting a stabilizing ring placed around the outer edge of the hub. Preferably, the stepped portion is configured to support the stabilizing ring;
The top surface of the stabilizing ring is thus at or above the outer edge of the hub, allowing an optical disc placed on the hub to contact the top surface of the stabilizing ring.

The foregoing and other advantages and features of the present invention will be better understood and more readily appreciated by reference to the following detailed description in conjunction with the accompanying drawings.

〔Example〕

FIG. 1 shows a stabilizing ring 10 formed in accordance with the present invention and positioned above a compact disc 12. As shown in FIG. Stability ring 10 has a circular outer edge 14, a circular inner edge 16, an upper surface 18, and a lower surface 20.

Compact disc 12 is in the form of a commercially available compact disc or any other optical disc. Typically, compact disc 12 has an aperture 22 formed in the center. When the compact disc 12 is inserted into a compact disc player (not shown), the spindle is inserted into the opening 22 and the clamping mechanism is inserted into the non-active surface 24.
come into contact with. The recording is read from the working surface 26 of the compact disc 12 by a laser sensor in the compact disc player.

Referring to FIG. 2, after concentrically aligning the stabilizing ring 10 and the compact disc 12, the stabilizing ring IO is placed on the non-working surface of the compact disc 12 and adjacent the outer edge 28 of the compact disc. Fix it to 12.

Preferably, the stabilization ring 10 is formed with a lower surface 20 comprised of an adhesive material. When the compact disc 12 contacts the adhesive underside 20, the stabilizing ring IO is held firmly in place by adhesive to maintain concentric alignment. Alternatively, the stabilizing ring 10 may be formed integrally with the compact disc 12.

Stabilization ring 10 may be formed from 90 durometer neoprene or any other suitable material. In applications where the stability ring 10 is integrally formed with the compact disc 12, the stability ring 10 may be made of the same material as the compact disc 12. A stabilizing ring 1 is used to hold the compact disc 12 in a rotating plane and prevent the compact disc 12 from tilting in rotation or fluctuating in the vertical direction.
0 must have sufficient mass to create a reaction force against the centripetal force of the rotating disk. The mass of the stabilizing ring 10 is approximately 4 and 11/16 inches (11.91 inches).
It is preferably in the range of 2° O grams to 3.6 grams for a compact disc having an outer diameter of cm).

It was found that a mass of 3.6 grams or more causes distortion.

Additionally, masses below approximately 2.0 grams are relatively ineffective at preventing rotational tilt and vertical fluctuations.

Stabilization ring 10 should have a uniform mass distribution along the circumference. One way to achieve uniform mass distribution while avoiding interference with the player is to make the stabilization ring 10 have a uniform thickness of approximately 1/32 inch (0,079 centimeters). Additionally, the width of stability ring 10, measured between outer edge 14 and inner edge 16, is preferably 1/4 inch (0,635 centimeters). Ideally, the outer diameter of the outer edge portion 14 should be the same as that of the compact disc 1, taking into account manufacturing tolerances, as shown in FIG.
Slightly smaller than the outer diameter of 2.

In addition to having a constant mass distribution and suitable dimensions, the stabilizing ring IO must be positioned concentrically above the compact disc 12.

FIG. 4 shows a positioning device 30 arranged between the compact disc 12 and the stabilizing ring IO.

Positioning device 30 includes a disk-shaped hub 34 having a circular outer edge 36. The outer diameter of the hub 34 is the same as that of the stabilizing ring 1.
0, the stabilizing ring 10 has a positioning device W
It can slide on the outer edge of 30. A projection 38 depends downwardly from the center of the hub 34 and is sized and shaped to fit within the central opening 22 of the compact disc 12. The protrusion 38 is the positioning device 3
0 with the compact disc 12 so that when the stabilizing ring 10 is placed around the outer edge 36 of the positioning device 30, the stabilizing ring 10 is aligned concentrically with the compact disc 12. Pressure is then applied to adhere the stabilizing ring 10 to the compact disc 12 and the positioning device 30 is removed.

FIG. 5 shows another embodiment in which the positioning device 40 is
Hub 41, projection 4 identical to the corresponding elements in FIG.
3, and an auxiliary groove 42 formed around the outer edge 45 of the hub 41. The auxiliary groove 42 is formed by a step 44 projecting outward from the outer edge 45 and a band 46 extending upward from the outer edge of the stepped portion 44 . The inner diameter of the band 46 is approximately equal to the outer diameter of the compact disc 12. The stepped portion 44 has a stabilizing ring 1 around the outer edge 45.
0 and is preferably configured to support the stabilizing ring 10 so that the adhesive top surface 18 is slightly above the top surface of the hub 41. This allows the compact disc 12 placed on the hub 41 to contact the adhesive top surface of the stabilizing ring 10. The positioning device 4Q preferably includes a protrusion 43 and a stepped portion 44 integrally formed with the hub 41.
, and a band 46, made of a suitable material.

While the preferred embodiment of the invention has been illustrated and described, it will be recognized that various modifications can be made without departing from the scope of the invention. For example, protrusion 38 may be other than circular, ie, triangular or rectangular, with any size suitable to fit within aperture 22 and prevent locator 940 from moving laterally relative to compact disc 12.

Accordingly, the invention may be practiced otherwise than as specifically described herein.

[Brief explanation of the drawing]

FIG. 1 is an isometric view of the preferred embodiment of the stabilizing ring positioned above the compact disc; FIG. 2 is an isometric view showing the stabilizing ring attached to the compact disc;
3 is a plan view of FIG. 2; FIG. 4 is an isometric view from below of a preferred embodiment comprising a positioning device positioned above the compact disk and below the stabilization ring; and FIG. 5 is an isometric view from below of the positioning device. FIG. 3 is a cross-sectional view of a second preferred embodiment of the invention. DESCRIPTION OF SYMBOLS 10... Stability ring, 12... Compact disk, 30... Positioning device, 38... Projection, 44...
stepped part. Arrangement (no change in content) Procedural amendment (method) 1. Indication of the case 1988 Patent Application No. 31712 2. Title of the invention Optical disc stabilization ring 3. Relationship with the person making the amendment case Applicant 4, agent

Claims (1)

What is claimed is: (1) a stabilizing ring for an optical disc having an outer edge with an outer diameter and a central opening, comprising: (a) having a ring shape and having a uniform mass along the circumference; A stabilization ring comprising: a circular body having a profile; (b) attachment means for attaching said body to a disk adjacent the outer edge of the disk. 2. The stability ring of claim 1, wherein the mass is between 2.0 and 3.6 grams. 3. The stability ring of claim 1, wherein the body has an outer diameter approximately equal to the outer diameter of the disk. 4. The stability ring of claim 3, wherein the body has a uniform thickness. (5) The main body is approximately 0
．． Stability ring according to claim 4, characterized in that it has a thickness of 79 mm (1/32 inch). 6. The stability ring of claim 1, wherein the body has a width less than half the outer diameter of the disk. 7. The stability ring of claim 6, wherein said width is approximately 1/4 inch. 8. The stability ring of claim 1, wherein said means for attaching said body to a disk includes an adhesive. 9. The stability ring of claim 8, wherein the body is configured such that the adhesive is formed on one side of the body. 10. The stability ring of claim 1, wherein the body is integrally formed with a disk. (11) A positioning device for positioning a stabilizing ring having an inner edge, an outer edge, and a top surface on an optical disk having an outer edge and an opening formed in the center, comprising: (a) an inner edge of the stabilizing ring; (b) a hub having a circular outer edge having an outer diameter approximately equal to the diameter of the hub; an alignment protrusion inserted into the central aperture of the disc such that the stabilization ring is concentrically aligned with the disc when the stabilization ring is placed on the circular outer edge; A positioning device characterized in that it is sized and shaped to be held in place. 12. The hub has a stepped portion projecting from the outer edge for supporting a stabilizing ring placed around the outer edge of the hub.
1) The positioning device described. (13) the stepped portion is configured to support a stabilizing ring such that the top surface of the stabilizing ring is at or above the outer edge of the hub and a disc placed on the hub 13. Positioning device according to claim 12, characterized in that it is capable of contacting the upper surface of the stabilizing ring. (14) The hub further includes a groove formed in the outer edge, the groove having a bottom projecting outward from the outer edge and an outer wall projecting upward from the bottom, and the bottom 12. A positioning device as claimed in claim 11, characterized in that the stabilizing ring projects a sufficient distance from the outer edge in order to lie flat in the groove. (15) The groove supports a stabilizing ring, so that the top surface of the stabilizing ring is above the outer edge of the hub, and a disk placed on the hub contacts the top surface of the stabilizing ring. The positioning device according to claim (14).