JPH0652020U - Optical disc player optical disc for inspection - Google Patents

Abstract

(57) [Summary] [Purpose] While being able to easily attach and detach,
(EN) Provided is an optical disc for inspection of an optical disc player, in which an adhesive joint between a recording disc unit and a hub is not peeled off or damaged during attachment / detachment. [Structure] A hub 15 provided with a center hole 17 is adhesively bonded to the inner circumference of a ring-shaped recording board portion 12, and a grip portion 20 protruding from the recording board portion 12 in the thickness direction thereof is provided. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an optical disk for inspecting an optical disk player used for inspecting a tracking servo characteristic for eccentricity and a focus servo characteristic for surface wobbling in an optical disk player such as a CD player.

[0002]

[Prior art]

 This type of optical disc for inspection is a separate piece from the ordinary optical disc so that surface wobbling and eccentricity are intentionally generated during reproduction. FIG. 2 shows an example of a conventional optical disc for inspection of this type.

The inspection optical disc 50 includes a ring-shaped recording disc portion 52 and a hub 55 that is adhesively bonded to the inner periphery of the recording disc portion 52. The hub 55 has the same thickness as the recording board portion 52, and a circular center hole 57 is formed in the inner peripheral portion of the hub 55 in an eccentric state.

When inspecting the tracking servo characteristics and the like using the inspection disk 50, the inspection disk 50 is mounted on the chucking portion 60 of the optical disk player to be inspected. In this case, the chucking portion 60 is, for example, in the shape of a circular comb tooth and adopts a self-chucking method of supporting the disc by its own elasticity. The hub 55 is held by being press-fitted and fixed.

[0005]

[Problems to be solved by the device]

 However, the conventional inspection optical disc 50 as described above needs to be attached to and detached from the chucking portion 60 by holding the outer peripheral edge portion. Therefore, the attachment / detachment operation is difficult to perform, and in particular, at the time of attachment / detachment, when the outer peripheral edge portion is pulled up as shown by the white arrow in FIG. 2, the adhesive joint portion 58 between the recording disk portion 52 and the hub 55 is formed. Due to a large external force, there is a problem that the adhesive joint portion 58 is peeled off or the recording disk portion 52 and the hub 55 are damaged.

In view of the above point, the present invention makes it possible to easily perform the attaching / detaching operation and prevent the adhesive joint between the recording board portion and the hub from being peeled off or damaged during the attachment / detachment. Another object of the present invention is to provide an optical disk for testing an optical disk player.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the optical disk for inspection of an optical disk player according to the present invention comprises a hub having a center hole, which is adhesively bonded to the inner circumference of a ring-shaped recording board, from a thickness of the recording board. It is characterized in that it is provided with a grip portion projecting in the direction.

[0008]

[Action]

 In the optical disc player inspection optical disc according to the present invention configured as described above, since the hub is provided with the gripping portion, the gripping portion is used to attach / detach the inspection optical disc to / from the chucking portion. Since it has a grip part, it can be easily attached and detached, and at the time of attachment and detachment, almost no external force acts on the adhesive joint between the recording board and the hub, so it may peel off or be damaged. The situation is certainly prevented.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of an optical disc for optical disc player inspection according to the present invention.

This inspection optical disc 10 is used for inspecting the tracking servo characteristics of a CD player, and the conventional hub 15 that is adhesively bonded to the inner circumference of the ring-shaped recording disc portion 12 is used. It is made thicker (higher) and protrudes in the thickness direction from the non-recording surface (upper surface) of the recording plate portion 12, and the protruding portion serves as the grip portion 20. A circular center hole 17 is formed in the inner peripheral portion of the hub 15 in an eccentric state as in the conventional case.

In the inspection optical disc 10 of the present embodiment having such a configuration, since the hub 15 is provided with the grip portion 20, the inspection optical disc 10 is chucked in the CD player to be inspected. When attaching / detaching to / from the section, the holding section 20 can be held. By holding the holding section 20, the attaching / detaching operation is facilitated, and the adhesive joint section 18 between the recording board section 12 and the hub 15 is provided. Since almost no external force is applied, it is possible to reliably prevent peeling and damage.

In the above embodiment, those skilled in the art can make improvements and ingenuities such as providing irregularities and stepped portions on the outer peripheral surface of the grip portion 20 in order to make it easier to attach and detach the inspection disk 10. It will be easy to think of.

Further, the inspection optical disk according to the present invention is not limited to the eccentric disk as described above, and the present invention is not limited to the CD, but may be a CD / ROM, a video disk, a magneto-optical disk, or the like. Of course, it can be applied to various things.

[0014]

[Effect of device]

 As can be understood from the above description, since the optical disc player inspection optical disc according to the present invention is provided with the grip portion on the hub, by holding the grip portion, the inspection optical disc can be attached to the optical disc player chuck. It can be easily attached / detached to / from the king part, and since the gripping part holds the adhesive part during attachment / detachment, almost no external force acts on the adhesive joint between the recording board part and the hub. The effect of being able to reliably prevent such situations is obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an optical disk for optical disk player inspection according to the present invention.

FIG. 2 is a partial cross-sectional view showing an example of a conventional optical disc for optical disc player inspection.

[Explanation of symbols]

 10 Optical Disc for Inspection 12 Recording Board 15 Hub 17 Center Hole 18 Adhesive Joint 20 Grip

Claims (1)

[Scope of utility model registration request] 1. A hub having a center hole formed therein, which is adhesively bonded to the inner circumference of a ring-shaped recording board, is provided with a gripping portion protruding from the recording board in its thickness direction. An optical disc for CD player inspection.