JPH082876Y2 - Dustproof lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to the structure of a dustproof cover of an optical or magneto-optical disk recording / reproducing apparatus.

[Conventional technology]

The optical disk recording / reproducing apparatus is an apparatus for recording and reproducing high density information on an optical disk which is an optical recording medium, and has a feature that the recording medium can be easily replaced. However, on the other hand, because it handles light, dust in the air accumulates on the surface of the objective lens for long-term use, and the laser light that is output or reflected and condensed by the objective lens of the optical pickup is obstructed, and the access time becomes longer. May be imitated. For this reason, in the conventional device, a device that determines the flow path of the air and a method of covering the opening of the case with an air filter are used so that dust that enters with the air does not approach the optical pickup.

A device related to this type of device is disclosed in, for example, Japanese Patent Laid-Open No. 63-293.
783, 64-52279 and the like.

[Problems to be solved by the device]

In the above-mentioned prior art device for determining the air circulation path, dust enters from a small gap between the opening of the disc insertion / exhaust port or the like or the lid and is gradually accumulated on the objective lens of the optical pickup to improve the performance such as access time. There was no remarkable dust-proofing effect, only the usage time was prolonged until the deterioration occurred.
Further, the method using an air filter causes clogging due to dust when the air filter is used for a long period of time, and thus needs to be replaced, which causes a problem that maintenance is troublesome.

An object of the present invention is to provide a dustproof lid for use in a disc insertion / ejection port which has a good dustproof effect and does not require maintenance.

[Means for solving the problem]

In order to achieve the above object, a first lid that rotates the disc insertion / ejection port by an insertion / ejection operation and has a rotation shaft having a rear side and an up / down direction and a rotation shaft having a lower part with a spring or the like from one side are provided. A third lid is provided to close one side of the second lid which is pressurized and folds backward, and further covers the entire front plate having the disc insertion / ejection opening or the insertion / ejection opening together with the first and second lids. It is a thing.

[Action]

Since the third lid and the first or second lid doubly cover the disc insertion and ejection port except when the disc is inserted and ejected, it is possible to prevent dust floating in the air from entering the device. it can.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 (a) and 1 (b). FIGS. 1 (a) and 1 (b) are cross-sectional views of a dustproof lid (hereinafter referred to as a device) of an optical disk reproducing apparatus according to the present invention as seen from the side, in each of which 1 denotes a cassette having an optical disk built therein, FIG. 1 (a) shows a state in which the cassette 1 is inserted through a cassette insertion / ejection port 16a provided on the front plate 16, and FIG. 2 (b) shows the cassette 1 positioned on the reproducing means of the apparatus. Indicates the status.

In FIGS. 1 (a) and (b), the first lid 3 is the front plate.
The side surface of 16 is rotatably engaged with the rotating shaft 3a as a center, and the frame 7 is rotatably engaged with its bearing portion 4a as a center. The lever 4 is engaged at its other end 4c with a pin 5 which moves up and down during the operation of positioning the cassette 1 on the reproducing means. As a result, when the pin 5 moves up and down in the direction of the arrow B in the figure, the lever 4 rotates about the bearing portion 4a and the first lid 3 rotates about the rotation shaft 3a, and when the cassette 1 is not inserted ( As shown in a), the first lid 3 is located above, and when the cassette 1 is positioned on the recording / reproducing means of the apparatus, the front plate 16 is provided as shown in (b).
The cassette insertion / exhaust port 16a of the second lid 2
The rotary shaft 2a is rotatably engaged with the front plate 16 and is pressed in the clockwise direction in the figure by the force of the spring 12. When the cassette 1 is not inserted, as shown in FIG. When the second lid 2 closes the cassette insertion opening 16a of the front plate 16 and the cassette 1 is positioned on the recording / reproducing means, it is pressed against the lower surface of the cassette 1 as shown in FIG. The third lid 14 is located at the lower portion and is rotatably engaged with the front plate 16 about the rotary bearing portion 14a and is pressed by the spring 15 in a direction to close the cassette insertion / exhaust port 16a.

 The operation of the dustproof lid will be described below.

When the cassette 1 is not inserted, the cassette insertion and discharge port 16a is closed by the second lid 2 and the third lid as shown in FIG. When it is positioned on the reproducing means, it is closed by the first lid 3 and the third lid and sealed by the two lids as shown in FIG.

Therefore, according to this embodiment, the cassette insertion / exhaust port 16 of the apparatus is
Since a can be doubly sealed, dust floating in the air can be prevented from entering from this portion and dust can be prevented from being accumulated on the surface of the objective lens of the optical pickup in the rear portion.

Other embodiments of the invention include, for example, a first lid and a third lid,
It is conceivable that it is composed of a second lid and a third lid, and a first lid and a second lid. It is also possible to enclose internal components including the dust-proof lid and the combined optical pickup with a partition wall to prevent dust.

[Effect of device]

According to the present invention, it is possible to prevent dust from floating in the air outside the device by double sealing the cassette insertion / exhaust port located in the front part of the optical pickup, and to prevent the dust on the objective lens of the optical pickup. Since the amount of dust adhering to and accumulating on the object can be remarkably reduced, the laser light output or reflected and condensed by the objective lens is not obstructed, and the access time becomes long even when used for a long time in a place with a large amount of dust. There is an effect that does not cause performance degradation.

This has the effect of significantly improving the MTBF of the system connected to the device, and greatly improving the operating rate and availability.

[Brief description of drawings]

1 (a) and 1 (b) are cross-sectional views of a dustproof lid of an optical disk recording / reproducing apparatus according to an embodiment of the present invention as seen from the side. 1 ... Cassette, 2 ... Second lid 3 ... First lid, 4 ... Lever 5 ... Pin 6 ... Cassette storage case 7 ... Frame, 12, 13 ... Spring 14 ... Third Lid, 15 …… Spring

Claims (1)

[Scope of utility model registration request] 1. A first lid that opens and closes by rotating a rotary shaft backward and upward in a optical or magneto-optical disk recording / reproducing device, and a second lid that opens and closes by holding a rotary shaft downward and opening backward. The first and second lids are pressed in one direction by springs so that the recording or reproducing medium is placed in the device. The first lid and the second lid are rotated and locked independently of each other in association with the moving operation of storing and discharging to prevent the state of closing the opening at the same time. The dust-proof lid is provided with a third lid that can be opened and closed by sealing the opening portion that is opened and closed with the lid by being pressed by a spring force or the like.