KR0175082B1 - A loading distinguishing device of compact disc player for motor - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc loading discrimination apparatus for a car CD player, wherein the clamp chassis (90) is mounted by an 80mm disc (50) and a 120mm disc (60) that are placed on the rotating roller (20) and enter the deck (70). In the clamping device having a guide plate 75 moving forward and backward along the guide hole 91, the guide hole 91 of the clamp chassis 90 by the entry of the 120mm disk 60. The microswitch 80 which is operated in contact with the rear surface of the guide plate 75 moved rearward and discriminates the size of the disks 50 and 60, is turned off when the 120mm disk 60 is loaded, and the 80mm disk. The first LED 31 installed on the center axis of the turntable 40 at the front position of the deck 70 so as to be turned on when 50 is loaded to determine the loading of the discs 50 and 60, and the 80 mm When the disc 50 and the 120 mm disc 60 are loaded, they are turned off to load the disc 50 and 60. The disc loading discrimination apparatus of the CD player for a car, characterized in that it is composed of a second LED 32 installed on the side rear part of the turntable 40 to reduce the number of parts, simplifying the configuration by reducing the number of parts to improve the assembly and productivity To make it work.

Description

Disc loading determination device for car CD player

1 is a view illustrating a state in which a disc is inserted into a conventional CD deck for

(a) is a plan view with a 120 mm disc inserted.

(b) is a plan view with the 80 mm disk inserted.

2 is a view showing a state in which a disc is ejected from a conventional CD deck for

(a) is a top view with the 120 mm disk withdrawn.

(b) is a plan view of a state in which an 80 mm disk is drawn out.

3 is a plan view of a car CD player according to the present invention.

4 is a state diagram in which a 120 mm disc of a car CD player according to the present invention enters,

(a) is an initial state diagram.

(b) is a medium-term state diagram.

(c) is a terminal state diagram.

5 is a state diagram in which an 80 mm disc enters a car CD player according to the present invention.

(a) is an initial state diagram.

(b) is a medium-term state diagram.

(c) is a terminal state diagram.

6 is a state in which the 80 mm disc is entered to the left to the car CD player according to the present invention.

7 is a state in which the 80 mm disc is entered to the right to the car CD player according to the present invention.

* Explanation of symbols for main parts of the drawings

31: First LED 32: Second LED

80: micro switch

The present invention relates to a CD player for a car, and in particular, by using two LEDs installed on the deck and a micro switch in contact with the guide plate moved to the rear when entering the 120mm disk by determining the size of the disk and the loading state of the disk The present invention relates to a disc loading discrimination apparatus for a car CD player, which reduces the production cost of a car CD player by reducing the number of parts.

In general, a disc identification device of a CD deck has two sensors, namely, a first sensor and a second sensor, provided adjacent to a CD door in front of the deck for a CD, so that the first sensor is inserted when the disc is inserted. When the disk is off, loading starts, and the CD player is moved to the inside of the deck and placed in the tray.

In addition, when the disk is unloaded, the disk seated on the tray is moved to the CD door side, and the ejection of the disk is completed by switching the second sensor from the on state to the off state by the forward movement of the disk.

However, in the disc identification device of the conventional CD player which is configured and operated as described above, since the optical pick-up reads the signal at the point of completion of loading, the inserted disc can be identified and the loading time is not only long but 80 mm. When centering the disk there was a problem that it is difficult to detect the malfunction of the centering.

In addition, when ejecting an 80mm disk, the area of the disk projecting out of the CD door of the CD deck is smaller than that of the 120mm disk, which is inconvenient to pick up the ejected disk.

Conventionally, in order to solve such a problem, Sony, Japan, has proposed a device that can identify the disk of the Cassidy deck using five LEDs.

As shown in (a) and (b) of FIG. 1, four LEDs 106, 108, 110, and 112 and phototransistors are installed on one PCB 128 before and after the roller 132 installed on the inner top of the CD door. Further, another LED 114 and a phototransistor were installed on the right side of the clamper 126 fixed to the chucking chassis 104 at the center rear side of the roller 132.

In this way, when the 120mm disk 100 is inserted into the deck in the state where the LED is installed as shown in FIG. 1 (a), the light emitted from the LEDs 106, 110, 112, and 114 is blocked by the 120mm disk 100 so that all corresponding phototransistors are turned off. However, the light emitted from the LED 108 is not blocked, but is transmitted to the corresponding phototransistor, which is detected by the microcomputer, and thus the CD is operated by identifying that the 120mm disk 100 is inserted.

In addition, when the 80mm disk 102 is inserted as shown in FIG. 1 (b), the light emitted from the LEDs 112 and 114 is blocked by the 80mm disk 102 so that the corresponding phototransistors are all turned off, but from the LEDs 106, 108 and 110. The emitted light is not blocked, but is transmitted to the corresponding phototransistors, and the microcomputer detects this and finally controls that the CD is operated by identifying that the 80mm disk 102 is inserted.

Meanwhile, as shown in FIG. 2A, light emitted from the LEDs 106, 110, and 112 when the 120 mm disk 100 is ejected from the deck is blocked by the 120 mm disk 100, so that the corresponding phototransistors are all turned off. The light emitted from the 103) 114 is not blocked, but is transmitted to the corresponding phototransistors and sensed by the microcomputer, thereby identifying that the 120mm disk 100 has been ejected.

And, when the 80mm disk 102 is ejected as shown in FIG. 2 (b), the light emitted from the LED 110 is blocked by the 80mm disk 102 so that the corresponding phototransistor is turned off, but the light emitted from the LEDs 106, 108, 112, and 114 is emitted. The light was not blocked and transferred to the corresponding phototransistors, which were detected by the microcomputer to identify that the 80mm disk 102 was ejected.

However, in the disc identification device of the conventional CD deck as described above, five LEDs (106, 108, 110, 112, 114) and phototransistors are used to detect the disc position, and one LED 114 and the phototransistor are separate PCBs. Since it must be attached to the substrate, there is a problem that the cost of the work process is increased and the efficiency of the work process is lowered.

In addition, at least one of the five LEDs installed in the deck is deeper or at least two LEDs should be 80mm or more apart to distinguish between 80mm and 120mm disks, which increases the size of the printed circuit board or takes up a lot of space in the mechanism configuration. There was a problem.

The present invention has been made in view of this point, and by using the two LEDs installed on the deck and the micro switch in contact with the guide plate moved to the rear when entering the 120mm disk by determining the size of the disk and loading state of the disk The purpose is to reduce the production cost of the car CD player by reducing the number of parts.

The object of this invention is to provide a clamping device having a guide plate which is moved forward and backward along a guide hole of a clamp chassis by an 80mm disc and a 120mm disc that is placed on a rotating roller and enters a deck. A micro switch which is operated in contact with the rear surface of the guide plate moved rearward along the guide hole of the clamp chassis to determine the size of the disk, and is turned off when the 120 mm disk is loaded and turned on when the 80 mm disk is loaded. A first LED installed on the center axis of the turntable at a front position of the deck so as to determine the loading of the deck; It provides disc loading discrimination device for car CD player composed of 2 LEDs. Is achieved.

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

As shown in Figs. 3 to 7, the configuration of the present invention is clamped by the 80mm disc 50 and the 120mm disc 60, which coincide on the rotary roller 20 and enter the deck 70. In the clamping device having a guide plate 75 moving forward and backward along the guide hole 91 of 90, the guide hole 91 of the clamp chassis 90 by the entry of the 120mm disk 60. The microswitch 80 which is operated in contact with the rear surface of the guide plate 75 moved rearward along) and the size of the disks 50 and 60 is turned off when the 120mm disk 60 is loaded. A first LED 31 installed on the central axis of the turntable 40 at the front position of the deck 70 so as to determine the loading of the discs 50 and 60 by turning on when the 80 mm disc 50 is loaded. And, when the 80 mm disc 50 and the 120 mm disc 60 are loaded, they are turned off to determine the loading state of the discs 50 and 60. The second LED 32 is installed on the side rear portion of the lock turntable 40.

The guide plate 75 is a guide hole 91 of the clamp chassis 90 as the 120 mm disk 60 enters the deck 70 by the rotation roller 20 as the disk 60 gradually enters. The guide plate 75 is moved to the back along the end, and when the loading of the 120 mm disk 60 is completed, the guide plate 75 is completely moved backwards to press the micro switch 80 so that the micro switch 80 is moved. Is turned on in the off state is configured to determine the entry state of the 120mm disk 60.

Hereinafter, the operation and effects of the present invention will be described based on the accompanying drawings.

First, the entry state of the 120 mm disk 60 shown in FIGS. 4A, 4B, and 4C is shown. As shown in FIG. 4A, an initial entry state of the 120 mm disk 60 is 120 mm. The micro switch 80 is in an inoperative state while the disk 60 is about to be placed in the rotation roller 20, and the first LED 31 blocks light from the phototransistor while laser light is blocked by the disk 60. It is in the off state because it does not detect the second LED 32 is on while the light passes through.

On the other hand, Figure 4 (b) is a medium-term entry state of the 120mm disk 60, the microswitch 80 is not operated because the 120mm disk 60 is not pushing the guide plate 75 to the rear yet, The LED 31 is not accurately determined whether the laser light is transmitted while passing through the translucent section of the 120mm disk 60, and the second LED 32 is turned off while the light is blocked at the reflecting section of the disk 60. .

Subsequently, in FIG. 4C, the 120 mm disk 60 is completely centered on the turntable 40, and the guide plate 75 is clamped rearward by the entry of the 120 mm disk 60. It is operated by contacting the microswitch 80 while being pushed along the guide hole 91 of), it is determined whether the 120mm disk 60 is mounted, the first LED 31 and the second LED 32 As it is off at the same time to determine that the 120mm disk 60 is fully loaded to chuck and drive the disk 60.

Meanwhile, FIG. 5 (a) (b) (c) shows that the 80mm disk 50 is transported on the central axis, and the initial entry of the 80mm disk 50 as shown in FIG. 5 (a). In the state, the micro switch 80 is not operated, and the first LED 31 is turned off by blocking the light in the reflection section, and the second LED 32 is turned on as the light passes.

In the medium-term entry state of the 80mm disk 50 shown in FIG. 5 (b), the microswitch 80 is not operated because it is not pressed, and the first LED 31 is semi-transparent of the 80mm disk 50. Because it is located in the section it is not possible to determine the on / off state, the second LED 32 is in the on state because the light passes.

In addition, the state shown in FIG. 5 (c) is a terminal entry state of the 80mm disk 50, so that the size of the 80mm disk 50 is small so that the guide plate 75 is not transported backward so that the microswitch 80 is Is not activated to determine that the 80mm disk 50 is mounted, the first LED 31 is turned on as the laser light passes through, the second LED 32 is light is reflected in the reflection section of the 80mm disk 50 As it is turned off while being blocked, the 80mm disk 50 is accurately positioned on the center of the turntable 40, thereby determining that the 80mm disk 50 has been loaded.

On the other hand, Figure 6 is a view showing a state in which the 80mm disk 50 is inclined to the left side, the micro switch 80 is not operated to determine the mounting state of the 80mm disk 50, but the first LED 31 and Since the second LEDs 32 are all turned off, it is not determined that the 80 mm disk 50 has been loaded, and the guide roller 75 rotates while the rotary roller 20 rotates until the first LEDs 31 are turned on. By the disk 50 until the center is accurately centered.

In addition, as shown in FIG. 5, the 80 mm disk 50 is biased to the right, and the rotary roller 20 is rotated until the first LED 31 is turned on and the second LED 32 is turned off. As it rotates, the disk 80 is centered.

Therefore, the conventional loading discrimination apparatus uses CDs of about 5 to determine the size and loading state of the disk, thereby increasing the production cost due to the complicated configuration of the CD, and increasing the number of parts. The other disc loading discrimination device is a micro switch that is turned on / off according to the transfer of the guide plate and two LEDs installed on the deck to accurately determine the disc loading state and the size of the disc, thereby reducing the number of parts and improving the assemblability. It is a very useful invention to reduce the production cost by simplifying the configuration.

Claims (1)

The guide moves forward and backward along the guide hole 91 of the clamp chassis 90 by the 80mm disc 50 and the 120mm disc 60 that are settled on the rotary roller 20 and enter the deck 70. In the clamping device provided with the plate 75, the 120 mm disk 60 in contact with the back surface of the guide plate 75 moved backward along the guide hole 91 of the clamp chassis 90, the operation And the microswitch 80 which discriminates the size of the disks 50 and 60, and is turned off when the 120 mm disk 60 is loaded, and is turned on when the 80 mm disk 50 is loaded, thereby turning the disk 50 and 60. The first LED 31 and the 80 mm disc 50 and the 120 mm disc 60 are turned off when the first LED 31 installed on the center axis of the turntable 40 at the front position of the deck 70 to determine the loading of the deck 70. To the second LED 32 provided on the side rear part of the turntable 40 so as to determine the loading state of the disc 50, 60. Disc loading determination device for a car CD player, characterized in that configured.