KR930005287Y1 - Pickup sense cover for c.d.p. - Google Patents

Abstract

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Description

Compact Disc Pickup Lens Cover Device

1 is a perspective view of a conventional compact disc.

2 is a disk loading state of a conventional compact disk.

3 is a detached state diagram of a conventional compact disk.

Figure 4 is a perspective view for showing an embodiment of the present invention.

5 is a disk mounting state of the present invention.

6 is an operation state diagram when the disk of the present invention.

Figure 7 is a removable state of the present invention.

8 is an operating state diagram of a detached state diagram of the present invention.

* Explanation of symbols for main parts of the drawings

1: plate chuck 2: turntable

3: lifter disc 3a: lifter pool

4: disc 5: pickup

7: pickup lens 8: lens cover

9: drive lever 9a, 10: gear

11: coil spring 20: cover device

The present invention uses a pickup lens of a compact disc audio product and a lens using an optical signal, so that the cover lens is covered when the pickup lens is not in use, thereby improving focus and product quality due to dust and foreign matter. A compact disc pickup lens cover device.

Conventional compact disc audio products have a plate chuck (1) for fixing the disc (4) onto the turntable (2) and a pickup lens for reading information of the lifter disc (3) and the disc (4) supporting the disc (4). It consists of a pick-up 5 with 7 and is supported by the base chassis 6.

However, since these pickup devices are always exposed to the pickup lens (7) there is a defect that causes a lot of effects on the focus and quality deterioration when dust or foreign matter.

Therefore, the present invention has been made in order to solve such a conventional drawback, and an object of the present invention is to provide a cover on a pickup lens for inputting an optical signal to improve focus and quality due to dust and foreign substances.

The present invention is composed of a cover device that prevents dust and foreign substances on the pickup lens for inputting the optical signal of the CD audio product. The lifter disc is lifted to the lifter disc by using the lifter disc which moves downward by the thickness of the disc when the disc is detached. The lens cover, which is rotated by a gear shape with a different pitch circle diameter, opens the pickup lens by the elastic force of the spring when the disc is used, and the pickup lens by the lifter pull when not in use. To protect it from dust and dirt.

Hereinafter will be described in detail with reference to the accompanying drawings an embodiment of the present invention.

The disk 4 is seated on the turntable 2 rotated by the drive motor, and a plate chuck 1 for fixing the disk 4 and a lifter disk 3 for supporting the disk 4 are constituted. In the compact disc device which consists of the pickup 5 which has the pickup lens 7 which inputs the optical signal of 4), when the disc 4 is detached from the turntable 2, the lifter disc 3 is plate chuck 1; In addition, the cover device 20 is configured to cover the upper side of the pickup lens 7 to be protected from dust or foreign matter by being rotated by the driving force when the disk 4 is moved downward by the thickness of the disk 4.

At this time, the cover device 20 is formed downwardly on the lifter disk 3 and is lifted down when the disk 4 is not in use, and is lifted by the lifter pool 3a for operating the drive lever 9 and the lifter pool 3a. A drive lever 9 which is driven and is fixed to the E-ring 14 on the shaft 12 of the base chassis 6 and has a gear 9a at its tip, and is connected to one side of the drive lever 9 and with a tension force. The driving lever 9 is pulled out so that the lens cover 8 is disengaged from the pickup lens 7 when the disc 4 is played, and the drive lever 9 is operated by the driving lever 9 and the shaft ( The lens cover 8 which is fixed by the shaft 13 and engaged with the gear 9a of the driving lever 9 and has a gear 10 having a small pitch circle diameter to cover the pickup lens 7 to protect it from dust or foreign matters It is composed of

According to the present invention having such a configuration, when the disk 4 is placed on the turntable 2, the pickup chuck 7 is moved while the plate chuck 1 is fixed so that the pickup 5 moves when the disk chuck 1 is rotated by the drive motor. In this case, as the lifter pull 3a is positioned on the drive lever 9, the tension force of the coil spring 11 pulls the drive lever 9 to the lens. The cover 8 is removed without covering the pickup lens 7 so that the pickup lens 7 inputs an optical signal and is played.

In addition, when the disc 4 is not present on the turntable 2, that is, when the mode is selected when stopping, opening the disc 4, or crossing the disc, the disc is turned on the turntable 2 as shown in FIGS. 7 and 8. If the 4 is not mounted, the plate chuck 1 and the turntable 2 are brought into contact with each other, so that the lifter disc 3 is moved downward by the thickness of the disc 4 and the pickup lens 7 is moved by the cover device 20. The lifter pull 3a protruding downward from the lifter disk 3 is rotated downward by the thickness of the disk 4, and the driving lever 9 is rotated in the clockwise direction to protect the dust from dirt and foreign matter. The gear cover 8 is stopped on the pickup lens 7 while the lens cover 8 is rotated counterclockwise while the gear 10 meshed with the gear 9a of 9 is rotated counterclockwise. Cover (7) to prevent the ingress of dust and foreign matter.

Since the disc 4 is mounted during play, the plate chuck 1 and the lifter disc 3 are raised by the thickness of the disc 3, so that the tension of the coil spring 11 is increased while the lifter pull 3a is raised. The driving lever 9 is rotated counterclockwise by the force, and the lens cover 8 is rotated clockwise by the clockwise rotation of the gear 9a and the meshed gear 10 to be separated from the pickup lens 7. .

Here, the moving angle and the distance between the drive lever 9 and the lens cover 8 are determined by the difference in the pitch circle diameter of the gears 9a and 10 and the pitch circle diameter of the gear 10 should be small.

As described above, the present invention allows the lifter disk to cover the pickup lens by using the lifter disk moved downward by the thickness of the disk while the plate chuck is in contact with the turntable when the disk is not in use (STOP, OPEN, CLOSE). As the lifter pull moves the drive lever, the lens cover can cover the pickup lens as the gear lever of the different size is engaged. As the lifter pull moves the driving lever, it prevents dust and foreign matter on the lens when the pickup lens is not in use. It is possible to prevent the deterioration of the focus and product quality caused by dust and foreign substances, thereby enabling the product to be upgraded.

Claims (2)

A turntable 2 for rotating the disk 4 by a drive motor, a plate chuck 1 for fixing the disk 4 and a pickup lens 7 for inputting optical signals of the lifter disk 3 and the disk 4. In the pick-up device having a), when the lifter disk 3 is detached from the turntable 2 by the thickness of the disk 4 together with the plate chuck 1, the lifter disk 3 is rotated and picked up by a driving force. A compact disc pickup lens cover device composed of a cover device (20) covering an upper side of a lens (7). The cover device (20) according to claim 1, wherein the cover device (20) is operated by a lifter pull (3a) for operating the drive lever (9) below the lifter disc (3), and the lifter pull (3a), and the coil spring (11). The driving lever 9 having a gear 9a on one side and the gear 10 engaged with the gear 9a on the one side in a counterclockwise direction to receive the elastic force of the pick-up lens. A compact disc pickup lens cover device composed of a lens cover (8) covering (7).