KR100207741B1 - Optical disk rotation apparatus in disk player - Google Patents

Abstract

Disclosed is an optical disc rotating apparatus for rotating an optical disc. The disclosed optical disk rotating apparatus includes a turntable on which an optical disk is mounted to rotate the optical disk mounted on a turntable at high speed, and a spindle motor mounted on the deck and rotating the turntable, wherein the spindle motor A gear member is coupled to the motor shaft, and a rotary gear coupled to the gear member is provided on the coaxial shaft of the turntable. By employing such an optical disk rotating device, the optical disk can be rotated at high speed.

Description

Optical disk rotation apparatus in disk player

The present invention relates to an optical disc rotating apparatus of a disc player, and more particularly, to an optical disc rotating apparatus of a disc player capable of rotating an optical disc mounted on a turntable at high speed.

1 is a schematic plan view of a disc player to which a conventional optical disc rotating apparatus is applied. Referring to this, the deck 10 is provided with a feed motor 11, the second gear 13, the third gear 14 and the pinion gear 15 for transmitting the rotational driving force of the feed motor 11, The rack gear 16 of the pickup unit 20 is engaged with the pinion gear 15 and slid by a pair of guide rails 11. Then, a spindle motor (not shown) is installed, and the turntable 30 on which the optical disc (not shown) is seated is rotated in engagement with the motor shaft of the spindle motor. In the disc player having the above structure, the optical disc is seated and rotated on the turntable 30, and the pickup unit 20 moves along the radial direction of the optical disc, and irradiates and receives light to pick up the unit 20. Can read the information recorded on the optical disc. At this time, in order to implement a multimedia environment more freely, it is necessary to access a large amount of information stored in the optical disk at high speed, and thus the optical disk should rotate at high speed.

However, the rotational speed of the spindle motor that rotates the optical disk at high speed has many obstacles to structural improvement due to mechanical problems such as increased friction and vibration as the rotational speed increases, and thus, many research time and costs have been invested.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an optical disc rotating apparatus of a disc player capable of rotating an optical disc at high speed by employing an auxiliary gear means without major structural improvement.

1 is a schematic configuration diagram of a disc player employing a conventional optical disc rotating apparatus.

2 is a schematic configuration diagram of a disc player employing an optical disc rotating apparatus according to an embodiment of the present invention.

3 is an exploded perspective view of the backlash gear coupled to the motor shaft of the spindle motor in the optical disk rotating apparatus shown in FIG.

4 is a side view of the turntable fixed to the main body of the spindle motor in the optical disk rotating apparatus shown in FIG. 2;

5 is a view showing a state in which the female gear of the backlash gear is rotated relative to the male gear by a predetermined angle in the optical disk rotating apparatus shown in FIG.

6 is a view showing a state in which the female gear of the backlash gear is not rotated by a predetermined angle relative to the male gear in the optical disk rotating apparatus shown in FIG.

Explanation of symbols for the main parts of the drawings

110 ... deck 111 feed motor

112 First Gear 113 Second Gear

114 Third Gear 115 Pinion Gear

116 Rack gear 120 ... pickup unit

130 ... turntable 132 ... support rods for turntables

134 ... optical disk seat of turntable 136 ... gear section of turntable

140 ... spindle motor 140a ... motor shaft

150 ... backlash gear 155 ... gearbox

155a ... shaft of hand gear

155b ... guide projection of hand gear 155c ... first projection of hand gear

155e ... tooth 160 ... female gear

160b ... guide groove 160c ... second projection of the arm gear

160e ... tooth 165 ... compression coil spring

In order to achieve the above object,

In the optical disk rotating apparatus provided with a turn table on which the optical disk is seated, and a spindle motor mounted on the deck and rotating the turn table, a gear member is coupled to the motor shaft of the spindle motor, and coaxially on the turn table. It is characterized in that the rotary gear is engaged with the gear member is provided.

In the present invention, the gear member includes a male gear fixed to the spindle motor shaft, a female gear provided coaxially with the shaft portion of the male gear and rotatable a predetermined interval with respect to the male gear, the male gear and the arm. It is preferable that it is a backlash gear provided with a spring; installed between the gears.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to Figures 2 to 6 the optical disk rotating apparatus of the present invention will be described. Referring to this, the deck 110 is provided with a feed motor 111, the second gear 113, the third gear 114 and the pinion gear 115 for transmitting the rotational driving force of the feed motor 111, The rack gear 116 of the pickup unit 120 is engaged with the pinion gear 115. When the pinion gear 115 is rotated, the rack gear 116 slides the pickup unit 120 along the pair of guide rails 111. The turntable 130 on which the optical disc is seated is engaged with the backlash gear 150 coupled to the motor shaft 140a of the spindle motor 140.

Referring to FIG. 4, the turn table 130 is provided with a seating portion 134 on which an optical disk is mounted, and a rotating gear 136 integrally formed under the seating portion 134 is provided. A bearing (not shown) is installed in the rotary gear 136, and the bearing is fitted into and fixed to a supporting rod 132 which is fitted into the screw hole 140b of the spindle motor 140. Accordingly, the seating portion 134 and the rotation gear 136 are rotatable relative to the support rod 132.

The backlash gear 150 meshed with the rotary gear 136 will be described with reference to FIGS. 5 and 6. The backlash gear 150 includes a male gear 155 and a female gear 160. The male gear 155 is fixed to the spindle motor shaft 140a, and the female gear 160 is fitted to the shaft portion 155a of the male gear 155 so that the male gear 155 is coaxially installed with the male gear 155 so that the male gear ( It maintains a state capable of rotating the predetermined interval with respect to 155. On the other hand, the female gear 160 is provided with a guide groove portion 160b into which the guide protrusion 155b formed in the shaft portion 155a of the male gear 155 is inserted, and the guide groove portion 160b includes the male gear 155. The relative rotation angle of the female gear 160 with respect to the male gear 155 is limited by the guide protrusion 155b of the. In addition, the first gear 155c is formed on the male gear 155 in a direction parallel to the plane thereof, and the second gear 160c is positioned on the female gear 160 at the position opposite to the first protrusion 155c. Is formed. Both ends of the compression coil spring 165 are fitted to the first protrusion 155c and the second protrusion 160c. At this time, the female gear 155 is rotated by a predetermined angle with respect to the male gear 155 by the elasticity of the compression coil spring 165, that is, the teeth 160e of the female gear 160 as shown in FIG. And the teeth 155e of the male gear 155 are elastically biased in a direction in which a predetermined angle is shifted from each other. Accordingly, when the driving is stopped, the teeth 160e of the arm gear 160 are brought into close contact with one side of the teeth 130e of the turn table 130 described above, and the teeth 155e of the male gear 155 are turned table. Since it is in close contact with the other side surface of the tooth 130e of 130, it is possible to suppress the flow of the turn table by the backlash. Meanwhile, as shown in FIG. 6, the male gear 155 may be restored while compressing the spring 165 during driving, thereby preventing interference between the turn table 130 and the female and male gears 155 and 160. Backlash for this is secured. The teeth 155e and 160e of the backlash gear 150 are engaged with the rotary gear 136 of the turntable 130 installed on the spindle motor 140 to complete the coupling.

The operation of the optical pickup device having such a structure will be described below. As the spindle motor 140 rotates, the rotary gear 136 meshed with the backlash gear 150 rotates, and thus the optical disk seated on the turn table 130 rotates. At this time, since the radius of the backlash gear 150 is greater than the radius of the rotary gear 136, it is rotated at a higher speed than the spindle motor 140 by the backlash gear 150. At this time, the rotation ratio of the turntable can be determined as the gear ratio of the backlash gear attached to the spindle motor and the rotation gear of the turntable. Can be rotated. The reading of the information recorded on the rotating optical disk is performed by the pickup unit 120 moving along the radial direction of the optical disk and irradiating and receiving light onto the optical disk.

Here, the turn table is installed on the spindle motor, of course, can be installed on the deck.

As described above, the optical pickup device of the present invention transfers the rotational drive movement of the spindle motor to the turntable through the backlash gear, thereby significantly reducing the waste and time of development of the new core parts. In addition, since the driving is performed by the backlash gear, the backlash phenomenon can be prevented in advance.

Claims (1)

In the optical disk rotating apparatus provided with a turn table 130 on which the optical disk is seated, and a spindle motor 140 installed on the deck and rotating the turn table, The gear shaft 155 of the spindle motor 140 is coaxially installed on the male gear 155 fixed to the motor shaft 140a and the shaft portion 155a of the male gear 155. A backlash gear 150 including a rotatable arm gear 160 and a spring 165 installed between the male gear 155 and the female gear 160 are installed at a predetermined interval. An optical disk rotating device, characterized in that the rotating gear 136 is engaged with the backlash gear 150 on the coaxial of the turn table (130).