JPH0561894U - Disc player lid opening / closing structure - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an opening / closing lid structure for a disc player in which external air mixed with dust is difficult to be sucked into a disc rotation space formed between a main body and an opening / closing lid. [Structure] A main body 2 is provided with a turntable 7 on which a disc is placed, and an opening / closing lid 3 that covers the disc placed on the turntable 7 so as to cover the disc. An inner rib 10 is provided so as to protrude from the outer end of the opening / closing lid 3 so as to surround the disc inside the outer rib 5 which is erected from the outer end.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 DISCLOSURE OF THE INVENTION The present invention provides a structure for opening and closing a lid of a disc player, which includes a main body portion provided with a turntable on which a disc is placed, and an opening / closing lid that covers the disc placed on the turntable so as to cover the disc. Regarding

[0002]

[Prior Art]

 Among disc players such as a CD ROM and a CD player, it is known that a disc is loaded / unloaded by a front loading system and a disc is loaded by a top loading system. Among them, portable disc players such as portable type are known. The top-loading type, which is often used, usually includes a main body provided with a turntable on which a disc is placed, and an opening / closing lid that covers the disc placed on the turntable. An outer rib projects from the outer end of the disk so as to separate the disk rotation space (inside) formed between the main body and the opening / closing lid from the outside when it is closed.

[0003]

[Problems to be solved by the device]

 In the structure of the lid opening / closing portion of the conventional top loading type disc player as described above, there is a gap between the main body and the peripheral edge (outer rib) of the opening / closing lid even when the lid is closed. When the disc rotates, the external air containing dust is sucked into the end face of the disc rotation space formed between the main unit and the lid by the air flow (vortex of air) generated around the disc, and the dust is collected. There has been a problem that it adheres to a disc or pick-up (optical head) and deteriorates its reading characteristics.

In view of the above point, the present invention provides a lid opening / closing portion structure of a disc player in which it is difficult for external air mixed with dust to be sucked into the disc rotation space formed between the main body and the opening / closing lid. The purpose is to do.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the structure of the lid opening / closing part of the disc player according to the present invention covers the main body provided with the turntable on which the disc is placed and the disc placed on the turntable. The opening / closing lid includes an opening / closing lid, and an opening / closing lid is provided with an outside rib protruding from an outer end thereof and an inside rib protruding downward so as to surround the disk.

[0006]

[Action]

 In the lid opening / closing portion structure of the disc player according to the present invention configured as described above, since the opening / closing lid is provided with the inner ribs in addition to the outer ribs, the outer ribs and the inner ribs are rotated when the disc is rotated. The space enclosed by and becomes negative pressure, and the velocity of the air changes according to Bernoulli's theorem, so the suction of air containing dust into the disk rotation space surrounded by the main body and the lid is restricted. As a result, the amount of dust adhering to the disc or pickup is greatly reduced. Therefore, the dust resistance of the disc player is improved.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an example of a disc player according to the present invention and a lid opening / closing portion structure thereof.

In FIG. 1, a disc player 1 includes a body portion 2 provided with a turntable 7 on which a disc D (shown in FIGS. 2 and 3) is mounted, and one end portion of which is hinge means 12 to the body portion 2. And an opening / closing lid 3 which is openably and closably coupled to the turntable 7 and covers the disk D placed on the turntable 7.

The main body portion 2 has a front convex portion 19 on which operation buttons are arranged, a rear convex portion 17 for accommodating a power source, etc., a circular surface 4 forming a bottom surface of the disk rotation space, and the circular surface. 4 and a step convex portion 6 protrudingly provided on the outer circumference.

On the other hand, the opening / closing lid 3 is provided with a clamper 9 which presses and holds the disc D placed on the turntable 7 on the lower surface side of the central portion thereof, and an outer rib 5 which descends from the outer end of the clamper 9. A circular inner rib that surrounds the disc inside the outer rib 5 and that falls down so that its abutting surfaces face the circular surface 4 and the step convex portion 6 in the closed state. 10 is projected.

In the lid opening / closing portion structure of the disc player of the present example having such a configuration, since the opening / closing lid 3 is provided with the inner rib 10 in addition to the outer rib 5, the outer rib 5 and the outer rib 5 are provided when the disc is rotated. A negative pressure is applied to the space surrounded by the inner rib 10 and the air velocity changes according to Bernoulli's theorem, so dust inside the disk rotation space surrounded by the main body 2 and the lid 3 is included. The intake of air is regulated, and the amount of dust adhering to the disc or pickup is greatly reduced. Therefore, the dust resistance of the disc player is improved.

FIG. 3 shows a main part of another example of the opening / closing lid structure of the disc player according to the present invention. In this example, a concave groove 22 is formed in the step convex portion 6 and the O-ring 21 is inserted therein. The projecting length of the inner rib 10 is extended so that when the opening / closing lid 3 is closed, the projecting end of the inner rib 10 contacts the O-ring 21.

By doing so, the sealing performance of the disk rotation space formed between the main body portion 2 and the opening / closing lid 3 is improved, and the dust resistance of the disc player 1 is further improved.

[0014]

[Effect of the device]

 As is clear from the above description, according to the lid opening / closing portion structure of the disc player according to the present invention, since the opening / closing lid is provided with the inner rib in addition to the outer rib, it is surrounded by the main body portion and the opening / closing lid when the disc is rotated. It is possible to reduce the amount of dust-containing air that is sucked into the disc rotation space, and to greatly reduce the amount of dust that adheres to the disc and pickup. Therefore, the dust resistance of the disc player is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a disc player to which the present invention is applied.

FIG. 2 is a cross-sectional view showing a lid opening / closing part structure in the disc player of FIG.

FIG. 3 is a sectional view showing another example of the lid opening / closing part structure of the disc player according to the present invention.

[Explanation of symbols]

 1 Disc Player 2 Main Body 3 Open / Close Lid 5 Outer Rib 7 Turntable 10 Inner Rib D Disc

Claims (1)

[Scope of utility model registration request] 1. An open / close lid structure for a disc player, comprising: a main body portion provided with a turntable on which a disc is placed; and an open / close lid which covers the disc placed on the turntable. A lid opening / closing unit structure for a disc player, wherein an inner rib that falls so as to surround a disc is provided on the inner side of the lid in addition to an outer rib that falls from an outer end of the lid.