KR980011247A - Optical Disc Player - Google Patents

Abstract

The present invention discloses an optical disk player.

In a general optical disk player, means for linearly moving the track in and out, and means for lowering it toward the turntable must be separately provided. Therefore, the number of parts is increased, resulting in a rise in unit price, lowering of workability, and inefficiency of space utilization.

To this end, according to the present invention, the tray is rotated through one guiding means to be transported outwardly, and simultaneously moved downward by the turntable, thereby reducing the unit cost of the number of parts and efficiently utilizing the space .

Description

Optical Disc Player

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

2 (a) and 2 (b) are a plan view and a side sectional view conceptually showing the optical disc player of the present invention. FIG.

3 to 6 are a top view and side sectional views showing the operation of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

10: main chassis 20: drive unit

21: Turn table 22: Pickup unit

30: tray 31: (semicircular) body

32: seat groove 40: guide boss

41: screw groove 50: feed screw

51: thread 60: guider

70, 80: Stopper 90, 90 ': Limit switch

100: Clamper

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk player, and more particularly, to an optical disk player in which a loading and unloading method of a tray is improved.

2. Description of the Related Art In general, an optical disc player is capable of recording / reproducing at a high density as compared with a tape recorder, and in particular, has a reflection quadrature that can be preserved and has come into widespread use in recent years.

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

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

The main body 1 is provided with an insertion port 1a and the tray 2 on which the disk D is seated is slidably installed on the inside and the outside of the insertion port 1a.

In this case, in order to slide the tray 2 inwardly and outwardly through the insertion port 1a of the main body 1, a gear portion is required on the tray 2. In the corresponding main body 1, And a plurality of gears are required. In order to place the tray 2 on the turntable (not shown) while the tray 2 is being conveyed 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 driving motor and a group of gears for moving the tray to position the optical disc on the turntable, and a motor and a gear group for moving the optical disc up and down. Therefore, the cost increases due to the increase in the number of parts and the deterioration of the assemblability. Especially, since the tray is transported in a straight line, it is necessary to secure the space of the main body, .

It is an object of the present invention to provide an optical disc player capable of performing loading / unloading and upward / downward movement of a tray through one means.

According to an aspect of the present invention, there is provided an optical disc player including: a main chassis; A drive unit having a turntable and a pickup unit slidably moved in a radial direction of the turntable, A tray for transferring an optical disc toward a turntable of the main new city; And guiding means for positioning the optical disc by positioning the optical disc on the center of the turntable by moving the tray up and down and rotating.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

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

The optical disc player according to the present invention includes a main chassis 10, a drive unit 20, a tray 30, and guiding means for guiding the tray 30 .

The drive unit 20 described above is located inside the main chassis 10 and includes a turntable 21 and a turntable 21 which transports the turntable 21 in the radial direction and performs recording / And a pick-up unit (22).

The tray 30 is for guiding the optical disc D toward the turntable 21 and has a substantially semicircular body 31. The semicircular body 31 has an inner upper surface A mounting groove 32 in which the optical disk D can be mounted is provided. In particular, a cutout groove 33 having a predetermined length is provided toward the outside on the center side of the rear side. The cutout groove 33 is provided for chucking operation between the optical disc D and the turntable 21 when the tray 30 is seated on the turntable 21.

On the other hand, the guiding means is for rotating the tray 30 up and down as well as clockwise and counterclockwise on the basis of one side. From the one side of the tray 30, A guide boss 40 is integrally formed and a screw groove 41 is formed on the guide boss 40 in the longitudinal direction.

A drive motor M is disposed on one side of the bottom surface of the main chassis 10 and a plurality of gear groups G meshed with each other are selectively rotated clockwise and counterclockwise And is rotationally driven.

On the other hand, a lower end portion of the feed screw 50 is forcedly inserted into the final gear G of the gear group G and is rotationally driven integrally therewith. On the upper end of the feed screw 50, (51) is inserted into the thread groove (41) of the threaded portion (40) and is engaged with the threads (41).

A guider 60 for guiding the movement of the tray 30 in the upward and downward directions is provided on the upper surface of the drive unit 20 corresponding to one side of the front surface of the tray 30 on which the guide boss 40 is extended, As shown in Fig.

A plurality of stoppers 70 and 80 are provided on the main chassis 10 to limit the rotational movement of the tray 30 when the tray 30 rotates inward and outward with respect to the guide boss 40.

At this time, it is preferable to further provide a sensing means for sensing the lowering position and the ejecting position of the tray 30 on the drive unit 20 described above. This is because, when the drive motor M is driven further, a large load may be applied to the rotation of the drive motor M by limiting the rotational movement of the turntable 21 through the stoppers 70 and 80. In particular, There is a risk of the contact being damaged.

As such a sensing means, a plurality of limit switches 90 and 90 'are provided on the drive unit 20 corresponding to one side and bottom surface of the tray 30, respectively. Reference numeral 100 denotes a clamper for chucking the optical disc D on the turntable 21. [

The operation of the optical disc player according to the present invention will now be described in detail.

Initially, as shown in FIG. 3 (A) (B), the tray 30 is initially lowered to come close to the turntable 21 on the drive unit 20. In order to reproduce the optical disc D in this state, the tray 30 must be transferred to the outer shaft of the main chassis 10. For this purpose, when the driving motor M is driven in the normal direction, And the feed screw 50 inserted in the center of the final gear g is rotatably driven so that the feed screw 50 And the guide boss 50 having the screw groove 41 engaged with the screw thread 41 is integrally formed with the tray 30 so that the tray 30 is slid upward. The reason why the tray 30 is slid upward without rotating the tray 30 is because the guider 60 provided at one side of the front side of the tray 30 is in contact with the side surface of the tray 30, And is lifted along the screw 50.

When the tray 30 is lifted along the conveying screw 50 as shown in FIG. 4, the contact state between the one side of the front side of the tray 30 and the guider 60 is released, And is rotatable to the outside. 5 (a) and 5 (b), the tray 30 is rotated about the guide boss 40 in the outward direction of the main chassis 10 by the rotational force of the conveying screw 50 The mounting groove 31 formed on the tray 30 is exposed to the outside and the optical disk D can be inserted. At this time, when the tray 30 is rotated to the outside of the main chassis 10 to some extent, the one side thereof comes into contact with the stopper 80 and is no longer rotated. At the same time, the limit switch 90 so that the driving motor M is no longer driven. Therefore, the drive motor M is prevented from being overloaded.

6, when the driving motor M is driven in the reverse direction after the optical disk D is placed on the seating groove 31 of the tray 30 in this state, The tray 30 is rotated in the inward direction of the main chassis 10 by the rotation, and at the same time, the rear side of the tray 30 comes into contact with the stopper 70 as shown in Fig. As a result, the tray 30 can not be rotated any more, and is lowered. When the tray 30 is lowered to some extent, the tray 30 is guided by the guider 60 and descends. The bottom surface of the tray 30 is brought into contact with the limit switch 90 'provided on the drive unit 20 so that the driving motor M ) Is no longer activated. 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 of the present invention, since the ejecting and the lowering movement of the tray are simultaneously performed through one guiding means, the number of parts can be reduced and the cost can be reduced. And is transferred to the inside and outside through the rotational motion, there is an advantage that the utilization of the internal space can be effectively performed.

Claims (5)

A main chassis 10; A drive unit (20) located in the main chassis (10) and having a turn table (21) and a pickup unit (22) slidingly transferred in a radial direction of the turn table (21); A tray (30) for transferring the optical disc (D) toward the turntable (21) in the main chassis (10); Guiding means for positioning and placing the optical disc (D) on the center of the turntable (21) by moving the tray (30) up and down and rotating; Wherein the optical disc player comprises: The apparatus according to claim 1, wherein the tray (30) has a substantially semicircular body (31), and a semicircular seating groove (32) on which an optical disk (D) And a cutout groove (33) is formed in the center face of the rear side. [2] The apparatus of claim 1, wherein the guiding means comprises: a guide boss extending integrally from one side of the tray, the guide boss having a screw groove in the longitudinal direction thereof; A driving motor M for rotating and driving a plurality of gears G which are positioned on the bottom surface of the main chassis 10 and meshed with each other; And the lower end thereof is inserted into the center of the final gear g among the gear group G driven by the drive motor M and is integrally rotated with the screw groove of the guide boss 40 41) and a screw thread (51) having a predetermined pitch in the longitudinal direction; A guider 60 extending through a predetermined length on one side of the drive unit 20 corresponding to one side of the front surface of the tray 30 on which the guide boss 40 is formed and guiding upward and downward movement of the tray 30 )Wow; A plurality of stoppers (70, 80) provided on the main chassis (10) and defining rotational movement of the tray (30) inward and outward; And an optical disc player. The optical disc player according to any one of claims 1 to 3, further comprising sensing means for sensing a lowering position and an ejecting position of the tray (30) on the drive unit (20). The optical disc drive according to claim 4, wherein the sensing means comprises an optical disc (90, 90 ') comprising a plurality of limit switches (90, 90') provided on the drive unit (20) player. ※ Note: It is disclosed by the contents of the first application.