KR100220588B1 - Optical disk player - Google Patents

Abstract

The present invention discloses an optical disc player.

In a general optical disc player, a means for linearly moving the tray inwards and outwards and a means for lowering the tray toward the turntable should be separately provided. As a result, the number of parts is increased, resulting in a problem of an increase in unit cost, workability, and inefficient use of space.

To this end, the present invention, by moving the tray through one guiding means to move the inner and outer, and at the same time to the lower movement to the turntable, it is possible to reduce the unit cost and efficient utilization of space by reducing the number of parts.

Description

Optical disc player

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc player, and more particularly, to an optical disc player having improved tray loading and unloading methods.

In general, an optical disc player is capable of recording and reproducing at a higher density than a tape recorder, and in particular, semi-permanent storage is possible.

Such an optical disc player is applied as one component of an audio system or provided as a portable compact disc player.

1 is a perspective view of a typical optical disc player.

The main body 1 is provided with an insertion opening 1a, and the insertion opening 1a is provided with a tray 2 on which the disk D is seated so as to slide inward and outward.

In this case, in order to slidably install the tray 2 inward and outward through the insertion opening 1a of the main body 1, a gear part is required on the tray 2, and the inner side of the corresponding main body 1 is driven to drive it. Drive motors and multiple gear groups are required. In addition, in order to seat the tray 2 on the turntable (not shown) in the state where the tray 2 is transferred to the inside of the main body 1, a separate means for lowering the tray 2 is required.

Such a conventional optical disc player requires a drive motor and a gear group for transferring a tray and a motor and a gear group for moving up and down in order to position the optical disk on a turntable. Therefore, the increase in the number of parts caused an increase in the unit cost and deterioration of the assembly. In particular, since the tray is reciprocated in a straight line, it is necessary to secure the space of the main body and thus cannot use the space efficiently. .

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object thereof is to provide an optical disc player capable of performing loading / unloading and up and down movement of a tray through one means.

In order to achieve the above object, the present invention provides a main chassis, a drive unit having a pickup unit, and an optical disc player having a tray, wherein a plurality of gear groups which are located on the bottom surface of the main chassis and mesh with each other are rotated. A driving motor to make; A feed screw inserted into a gear center of the gear group to rotate integrally therewith and having a thread having a predetermined pitch in a longitudinal direction; A guide boss formed integrally extending from one side of the tray and having a screw groove formed in the inner surface thereof in a longitudinal direction, the guide boss being screwed with the feed screw; A guider formed on one side of the drive unit at a predetermined height to guide the tray to be moved in an up and down direction below a predetermined height and to be rotated in a horizontal direction above the predetermined height; A plurality of stoppers installed to be in contact with the outer periphery of the tray to limit the range of rotational movement of the tray; It includes a plurality of limit switches provided on the drive unit for detecting the lowered position and ejecting position of the tray.

1 is a perspective view showing the appearance of a general optical disc player.

2 (a) and 2 (b) are front and side cross-sectional views conceptually showing the optical disk player of the present invention.

3 to 6 are plan and side cross-sectional views showing the operation of the present invention.

* Explanation of symbols for main parts of the drawings

10: main chassis 20: drive unit

21: turn table 22: pickup unit

30: tray 31: (semi-circular) body

32: settled groove 40: guide boss

41: screw groove 50: feed screw

51: thread 60: guider

70, 80: stopper 90, 90 ': limit switch

100: clamper

Hereinafter, a preferred embodiment according to the present invention will be described in detail by the accompanying drawings.

2 (a) and 2 (b) are plan and side cross-sectional views conceptually showing the optical disc player of the present invention, and FIGS. 3 to 6 are plan and side cross-sectional views showing the operation of the present invention.

As shown therein, the optical disc player according to the present invention includes a main chassis 10, a drive unit 20, a tray 30, a drive motor M, a transfer screw 50, and the like. Guide boss 40, guider 60, stoppers 70, 80 and limit switches 90, 90 '.

The drive unit 20 is located inside the main chassis 10. The pickup unit transfers the turn table 21 in the radial direction of the turn table 21 and performs recording / reproducing from the optical disk D. FIG. And a pick-up unit 22.

On the other hand, the tray 30 is for guiding the optical disk D toward the turntable 21. In detail, the tray 30 has an approximately semicircular body 31 and has an inner upper surface of the semicircular body 31. It is provided with a seating groove 32 on which the optical disk (D) can be mounted, in particular, the rear side center side is provided with a cutting groove 33 of a predetermined length toward the outside. The cutting groove 33 is provided for the chucking operation between the optical disk D and the turn table 21 when the tray 30 is seated on the turn table 21.

The drive motor (M) is located on the bottom surface of the main chassis 10 and rotates the plurality of gear groups (G) meshed with each other. One end of the feed screw 50 is fitted into the center of the gear g of the gear group G to rotate integrally, and a thread 51 having a predetermined pitch is formed on the outer circumference of the feed screw 50 in the longitudinal direction.

Guide boss 40 is formed integrally extending from one side of the tray 30, a screw groove 41 is formed in the inner surface in the longitudinal direction is screwed with the feed screw (50).

The guider 60 is formed at a predetermined height on one side of the drive unit 20 to guide the tray 30 to be transferred in an up and down direction below a predetermined height and to rotate in a horizontal direction above a predetermined height.

The stoppers 70 and 80 are provided in plural so as to be in contact with the outer circumference of the tray 30 to limit the range of rotational movement of the tray 30.

Limit switches 90 and 90 'are provided on the drive unit 20 in order to detect the lowering position and the ejecting position of the tray 30.

Referring to the operation of the optical disk player according to the present invention configured as described above in detail as follows.

First, as shown in FIG. 3 (a) and FIG. 3 (b), the tray 30 is initially lowered to be close to the turntable 21 on the drive unit 20. In this state, when the optical disk D is to be reproduced, the tray 30 must be transferred to the outside of the main chassis 10. For this purpose, when the driving motor M is driven in the forward direction, the driving motor ( A plurality of gear groups G rotated by M) are driven to rotate, and in particular, the transfer screw 50 forcibly inserted into the center of the final gear g is driven to rotate, whereby the transfer screw 50 The tray 30 formed integrally with the thread 51 formed on the upper outer circumferential surface of the upper surface and the guide boss 50 having the engaged threaded groove 41 is slid upward. At this time, the tray 30 is not rotated and is moved upwardly because the guider 60 provided on one side of the front surface of the tray 30 is in contact with the side surface of the tray 30. It will rise along the screw (50).

As such, when the tray 30 rises along the transfer screw 50, the contact state of the front side of the tray 30 and the guider 60 is released as shown in FIG. 4, and the tray 30 is released. It becomes a state rotatable outward. Accordingly, as shown in FIGS. 5A and 5B, the tray 30 may be driven by the rotational force of the transfer screw processing chamber 102 and the guide boss 40. 10, the mounting groove 31 formed on the tray 30 is exposed to the outside so that the optical disk D can be inserted. On the other hand, if the tray 30 is rotated to the outside of the main chassis to some extent, one side thereof is in contact with the stopper 80 is no longer rotated, at the same time limit switch 90 constituting the sensing means By contacting the drive motor (M) is no longer driven. Therefore, overloading of the driving motor M is prevented.

In such a state, the optical disk D is seated on the seating groove 31 of the tray 30, and then the driving motor M is driven in the reverse direction. By the rotation of the tray 30 is rotated in the inner direction of the main chassis 10, at the same time as shown in Figure 4 the tray 30 is one side of the rear contact with the stopper 70. By this, the tray 30 is no longer rotated and descends, and in a lowered state, the tray 30 is guided and lowered by the guider 60. When the tray 30 is lowered to some extent and adjacent to the turntable 21, the bottom surface of the tray 30 comes into contact with the limit switch 90 ′ provided on the drive unit 20, thereby driving the motor M. FIG. ) Will no longer be driven. Although not shown, the optical disk D is chucked through the clamper 100 and the recording / reproducing of the optical disk D is performed through the pickup unit 22.

As described above, according to the optical disc player according to the present invention, since the ejecting and lowering movements of the tray are simultaneously performed through one guiding means, the cost can be reduced by reducing the number of parts. Since it is transferred to the inside and the outside through the rotational movement, there is an advantage that can effectively utilize the internal space.

Claims (1)

In an optical disc player having a main chassis 10, a drive unit 20 having a pickup unit 22, and a tray 30, a plurality of which are located on the bottom surface of the main chassis 10 and engaged with each other. A drive motor M for rotationally driving the gear group G of the engine; A feed screw 50 inserted into a center of the gear g of the gear group G to rotate integrally therewith and having a thread 51 having a predetermined pitch in the longitudinal direction; A guide boss 40 formed integrally extending from one side of the tray 30 and having a screw groove 41 formed in an inner surface thereof, the guide boss 40 being screwed with the feed screw 50; A guider 60 formed on one side of the drive unit 20 to guide the tray 30 to be moved upward and downward at a predetermined height or less and to rotate in a horizontal direction at or above a predetermined height; ; A plurality of stoppers (70, 80) installed to be in contact with the outer periphery of the tray (30) to limit the range of rotational movement of the tray (30); And a plurality of limit switches (90,90 ') provided on the drive unit (20) for sensing the lowering position and ejecting position of the tray (30).