KR100211862B1 - Apparatus for loading a disc of a compact disc player - Google Patents

Abstract

The present invention relates to a disc loading apparatus of a compact disc player. In the related art, since a disc type is determined by combining signals detected by a plurality of optical sensors after mounting a disc, the structure is complicated and the production cost is increased. Occurred.

However, in the present invention, the first detection sensor 42 and the second detection sensor 44 for detecting the amount of rotation of the centering plate 20, 30 are installed on the top plate 13, and the centering plate 20 (30). The sensing stage 24 is formed, so the first sensing sensor 42 and the second sensing sensor 44 detect the amount of rotation of the sensed 24 formed on the centering plates 20 and 30, thus loading. The type of disc to be used can be easily determined, and the structure thereof is simplified.

Description

Disc loading device for compact disc player

1 is a plan view schematically showing the configuration of a loading apparatus of a conventional compact disc player.

2 is a plan view showing the configuration of a preferred embodiment of the compact disc player disk loading apparatus according to the present invention.

3 is a longitudinal sectional view showing the construction of a preferred embodiment of a compact disc player disc loading apparatus according to the present invention;

Figure 4 (a) is an operating state showing the operating state when inserting the 8cm disc of the compact disc player loading apparatus according to the present invention.

Figure 4 (b) is an operating state showing the operating state when inserting a 12 cm disc of the compact disc player loading apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Main chassis 3: Loading motor

7: roller 8: turntable

13: top plate 20, 30: centering plate

21,31: hinge 22, 32: stopper

23,33: locking groove 24: detection stage

42: first detection sensor 44: second detection sensor

50: spring D1, D2: disk

The present invention relates to a disc loading apparatus of a compact disc player, and more particularly, to a compact disc player disc loading apparatus capable of determining precisely the type of disc and the disc to be inserted is accurately seated on the turntable.

In general, a compact disc player is a playback apparatus that mounts a disc on which a sound signal or a video signal is recorded on a turntable, and reproduces a disc seated on a turntable by an optical pickup device.

In such a compact disc player, the turntable is rotated by a spindle motor installed at the bottom of the turntable, so that a disk mounted on the turntable is rotated, and an optical pickup device positioned at the lower side of the disk is moved along a predetermined path by driving the transfer motor. The information recorded on the disc is played back.

The structure of the conventional compact disc player will be described schematically with reference to FIG. 1, and a loading motor is fixed on the main chassis 1 to perform loading of 8 cm discs D1 and 12 cm discs D2 ( 3) We are equipped. In addition, a moving plate 4 is installed at one side of the main chassis 1, and a rotating plate 5 is installed at one side of the moving plate 4 to load the discs D1 and D2.

The moving plate 4 is selectively supplied with power from the loading motor 3 by a switching device such as, for example, a solenoid valve, and the rotating plate 5 is moved by the moving plate 4 in accordance with the movement of the moving plate 4. The pivoting motion is achieved based on the fixed point.

That is, the gear group 6 which decelerates a constant speed by receiving power from the loading motor 3 is rotatably fixed to any one rotation plate 5, and the roller 7 is fixed to the last gear of the gear group. Is installed so that both ends are rotatable at the rotating ends of the respective rotating plates 5. The roller 7 is configured in the form of a django which gradually decreases in diameter from both ends to the center in order to guide the discs D1 and D2 to the center.

In addition, a rear end of the main chassis 1 is provided with a chucking plate (not shown) that rotates as the moving plate 4 moves and supports the disks D1 and D2 seated on the turntable 8.

The turntable 8 is fixed to a floating plate 10 held by a spring 50 relative to the main chassis 1 and retaining elasticity for up and down flow, and on the floating plate 10 disks D1 and D2. An optical pickup apparatus 11 for reproducing a signal from the apparatus is movably provided. The optical pickup apparatus includes an objective lens 12 for irradiating the laser generated from the pickup to the disks D1 and D2 and focusing the laser light reflected from the disks D1 and D2 to a desired focus on the top. Doing.

A top plate 13 is provided at an upper portion of the main chassis 1, and a guide plate 14 in contact with the upper surface of the disks D1 and D2 is fixed to the bottom of the top plate 13.

On the other hand, the entrance side of the disk D1 (D2) of the main chassis 1 is irradiated with light to enter the disk D1 (D2) to determine the entry and type of the disk (D1) (D2) An optical sensor 15 is installed.

Referring to the operation of the compact disc player schematically, when the discs D1 and D2 are inserted, the optical sensor 15 detects the drive and drives the loading motor 3 and the rollers 7 according to the driving of the loading motor 3. ) Will rotate.

Therefore, the discs D1 and D2 positioned between the roller 7 and the guide plate 14 are inserted toward the turntable 8 when they slip against the guide plate 14 by the pressing force and the rotational force of the roller 7. The chucking plate 9 receiving the power of the loading motor 3 is lowered by a switching device for loading and switching the power of the loading motor 3 so that the chucking operation is continuously performed.

When the chucking of the disks D1 and D2 is completed, the type of the disks D1 and D2 is determined by the signal combination of the optical sensors 15, and then the spindles are fitted to fit the loaded disks D1 and D2. The motor 15 is driven to rotate the disks D1 and D2. At the same time, a feeding motor (not shown) is driven to linearly move the optical pickup device toward or away from the turntable 8, and simultaneously irradiate the laser to the bottom of the disks D1 and D2. The image or audio signal is reproduced by the wavelength of the reflected light.

However, the compact disc (D1) (D2) player having such a configuration not only makes the loading operation unstable when loading the disc (D1) or (D2) but also determines the type of the disc (D1) (D2) by separate optical sensors. It had a problem that the composition became complicated.

That is, when the discs D1 and D2 enter, they must be accurately seated on the turntable 8, which requires the discs D1 and D2 to enter the center portion. Conventionally, for this purpose, the roller 7 is configured in a django shape so that two points of the periphery of the discs D1 and D2 contact the rollers 7 and the discs D1 and D2 are rotated as the rollers 7 rotate. Although it is guided to the center part, this allows the disc D1 and D2 to enter even when the disc D1 and D2 are eccentrically entered, and since then, the position correction is performed in the roller 7 itself. While the disks D1 and D2 are moved, the correction operation is limited.

In particular, in the case of the disc D1 having a small size, the above-described problem is further exacerbated. For example, as shown in FIG. 1, recently, two types of discs D1 and D2, 8 cm disc D1 and 12 cm disc D2, have been developed. These two types of discs D1 and D2 are manufactured to be compatible with each other.

Therefore, in the case of the 8cm disc (D1), the problem is that the problem is that the loading operation due to the eccentric entry of the disc (D1) is unstable, because the problem is that the size can not be accurately inserted into the center during loading.

Further, in determining the types of the discs D1 and D2, the types of the discs D1 and D2 are combined by combining the signals detected by the several optical sensors 15 after the discs D1 and D2 are seated. Since it is necessary to install several photosensors 15, the configuration has had a problem that becomes complicated.

On the other hand, as an example of the invention for solving the above-mentioned problem, in the case of the domestic patent application publication No. 96-19202, it is possible to enter a disk of different sizes by a pair of control levers, but also has the effect of preventing eccentric entry In addition, since the rear lever and the front lever are installed in addition to a plurality of levers, that is, the control lever, the structure has a complicated problem.

In addition, in the case of the Korean Utility Model Publication No. 95-31352, which was previously filed to solve the above-mentioned problems, the first and second locking members and the body of the lever function and the disk inserted by the operating member are guided, but the lever function Since the structure of a plurality of parts having a meshing structure, the structure is complicated, and furthermore, a problem arises in that it is impossible to insert discs of different sizes.

In view of the above problems of the present invention, an object of the present invention is to provide a disc loading apparatus of a compact disc player capable of determining a disc type with a simple configuration while achieving a stable disc loading operation.

In the disc loading apparatus of the compact disc player of the present invention for achieving the object of the present invention, a sensing stage is formed at one end of the left centering plate, and the top plate detects the amount of rotation of the sensing stage to determine the type of disc. Since the first detection sensor and the second detection sensor are installed, it can be achieved.

Best Mode for Carrying Out the Invention Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.

2 shows a configuration of a preferred embodiment of a disc loading apparatus of a compact disc player according to the present invention, which according to the present invention is a pair of centering plates 20 rotatably coupled to the top plate 13 ( 30).

Each centering plate 20 (30) has a fixed end that one side is coupled to the hinge (21) (31) to the top plate 13, and the stopper (22) and (32) to rotate around the hinge (21) (31) The locking groove 23, 33 is formed of a free end is formed.

In addition, the stopper 22 of the left centering plate 20 interferes with the locking groove 33 of the right centering plate 30, and the stopper 32 of the right centering plate 30 catches the left centering plate 20. It is configured to interfere with the groove 23.

Each of the centering plates 20 and 30 is supported by the springs 50 to rotate in opposite directions so that the respective locking grooves 23 and 33 are caught by the stoppers 22 and 32 of the other end when no load is applied. State is maintained.

Meanwhile, a sensing stage 24 is formed on the left centering plate 20, and the first sensing sensor 42 and the first sensing sensor 42 and a circle are formed on the top plate 13 by the sensing stage 24 around the hinge 21. Two detection sensors 44 are installed. In this case, the sensing stage 24 may be installed on the right centering plate 30 in addition to the left centering plate 20, and the first and second sensing sensors 42 and 44 may also be installed on the right side according to the sensing stage 24. It is possible to do

The first detection sensor 42 and the second detection sensor 44 have a predetermined angle phase difference, and when the left centering plate 20 is rotated by a predetermined angle or more, it outputs a signal to the controller.

According to FIG. 3, the centering plates 20 and 30 are arranged in a stacked manner, so that the stoppers 22 and 32 can interfere with the disks D1 and D2 guided to their bottoms. It extends downward.

According to the present invention having the configuration as described above, when the disks D1 and D2 enter, the loading motor 3 operates to pull the disks D1 and D2 in. At this time, any one of the stoppers 22, 32 of the centering plate 20, 30 is first in contact with the peripheral edge of the disk (D1) (D2) or at the same time. Looking at the case where one side is in contact with the disk (D1) (D2) first (to explain the case where the left centering plate (20) touches for convenience), the stopper 22 is pushed by the disk (D1) (D2) The left centering plate 20 is rotated about the hinge 21. Therefore, the locking groove 23 of the left centering plate 20 has a force to be separated from the stopper 32 of the right centering plate 30. At this time, since the rotation of the left centering plate 20 pulls the spring 50, the spring 50 rotates the right centering plate 30 by the rotation of the left centering plate 20, so the right centering plate 30 is left centering. It is made to rotate integrally with the plate 20. Accordingly, the stopper 32 of the right centering plate 30 is in contact with the periphery of the discs D1 and D2 and simultaneously pushes the stoppers 22 and 32 on both sides.

In further detail, the actual left centering plate 20 or the right centering plate 30 maintains a state of interference by the respective stoppers 22 and 32 and the locking grooves 23 and 33. The rotation of the right centering plate 30 mentioned above as being incapable of rotating independently toward or against the other side should be understood as a very fine angle. This means that each centering plate 20, 30 can be rotated only in opposite directions so that the discs D1 and D2 entering are always pressed simultaneously by two stoppers 22 and 32 at the same time. You can see that entry is allowed.

Therefore, each of the centering plates 20 and 30 starts to rotate in opposite directions by the discs D1 and D2 entered by the above-described action, and allows the discs D1 and D2 to enter. After each of the stoppers 22 and 32 passes the maximum diameter of the discs D1 and D2, the stoppers 22 and 32 return to their original positions by the restoring force of the spring 50.

Since each centering plate 20, 30 in the return operation is in contact with the rear end of the disk does not make a sudden return, the return operation is performed at the same speed as the expansion, and the return operation is continuously performed to maintain the center. Each of the stoppers 22 and 32 and the locking grooves 23 and 33 are returned to the interfering position again.

As an example of the 8 cm disc D1 entered here, as illustrated in FIG. 4A, the sensing end 24 of the left centering plate 20 has an angle at which the maximum displacement is relatively small. Only the first detection sensor 42 detects this, and the second detection sensor 44 does not detect. Accordingly, the controller determines that the disc D1 (D2) entering is the 8 cm disc D1 (D2) according to the signals of the first detection sensor 42 and the second detection sensor 44. On the other hand, as shown in the example of the 12cm disk (D2), as shown in Figure 4 (b), the sensing end 24 of the left centering plate 20 is the first displacement has a relatively large angle, so the first Since the detection stage 24 is detected in the detection sensor 42 as well as in the second detection sensor 44, the control unit receives a signal from both the first detection sensor 42 and the second detection sensor 44. It is determined that the 12 cm disc (D2) being.

As described above, in the present invention, a first sensing sensor and a second sensing sensor are installed on the top plate to detect the rotation amount of the centering plate, and a sensing end is formed on the centering plate. Therefore, since the first sensing sensor and the second sensing sensor sense the amount of rotation of the sensing stage formed in the centering plate, there is a very useful effect that can easily determine the type of disk entering the compact disc player.

Claims (1)

A centering plate is hinged to both sides of the top plate, and the centering plate is provided with a stoppung and a spring to allow insertion of the disc properly according to the size of the disc, wherein the centering plate 20 has one end portion. The sensing stage 24 is formed at the top plate 13, and the top plate 13 detects the rotation amount of the sensing stage 24 at different phase angles to determine the type of the discs D1 and D2. 42) and the disc loading device of the compact disc player, characterized in that the second sensor 44 is installed.