JPS6230176Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to optical disc players and the like that can reproduce images by reading signals stored on the disc surface using an optical system such as a laser beam. The present invention relates to a reading position display device in a disc player that displays a display.

Optical video disc players use a disc with a large number of bits recorded on the disc surface, and irradiate the disc surface with a laser beam while rotating the disc at high speed.
Images and sounds can be reproduced by optically reading the reflected light and converting it into electrical signals. The use of the laser beam is strictly regulated from the standpoint of safety to prevent it from leaking to the outside. Therefore, the structure is such that the disc cannot be visually seen from the outside while it is being played. For this reason, a reading device is required to indicate which position on the disc is currently being played. Conventionally, as this type of reading device, there is a known device which has an effective function of storing a code for displaying each frame of a video, and using a microcomputer to arbitrarily search for the code or to display the frame number being played. It is being However, since it uses a microcomputer, it is very expensive, and therefore only high-end disc players are equipped with it.

The present invention has been devised in view of these points, and it is an object of the present invention to provide a reading position display device for a disc player that has an inexpensive and effective function of displaying the reading position on the disc surface.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows the appearance of a main body 1 of an optical disc player, and an operating section 2, a position display section 3, and other display sections 4 are provided on the right side of the top surface of the main body 1. As shown in FIG. A middle plate 7 is provided horizontally with a shallow step on the top surface of the main body 1 where the lid 5 can be opened and closed, and a turntable 9 that holds a disk 8 and rotates it at high speed protrudes from the center of the middle plate 7. Furthermore, a moving port 10 is opened in the middle plate 7 in a radial direction with the turntable 9 at the center. This moving port 10
is the head of the reading device 11 for emitting a laser beam and taking in the reflected light, that is, the condensing lens 1.
1a is made to protrude.

FIG. 2 is a structural explanatory diagram of the reading device 11. The reading device 11 is capable of reciprocating along the direction of the moving port 10, and with this configuration,
Fix the disc 8 to be played to the turntable 9 with the clamp 12, and
By rotating it in one direction, you can read and follow the signals stored on the 8 disks. This reciprocating movement of the reading device 11 is performed with the following structure. That is, a pair of guide rails 13 are fixed to the back surface of a mechanical chassis 14 shown in FIG. A flat base 16 on which the reading device 11 is mounted is slidably supported. And this base 1
6 is adapted to be reciprocated by a drive motor (not shown). This base 16 has a reading device 1
An indicating device 17 is provided for displaying the reading position on the surface of the disk 8 by the reading device 1.

FIG. 3 is a structural explanatory diagram of the main body 1 of the disc player viewed from the side. The instruction device 17
consists of an arm 18 and a pointing member 19. The arm 18 has an elongated plate body, one end of which is positioned below the position display section 3, and the other end is fixed near the condenser lens 11a of the base 16, closing the opening 10 of the middle plate 7. This prevents dust and the like from entering through the opening 10. However, base 16 and arm 1
A mechanical chassis 14 exists between the arm 18 and the arm 18, and the arm 18 cannot be moved in this state. Therefore, the mechanical chassis 14 is provided with a movement groove 20 parallel to the movement opening 10 of the middle plate 7 so that the arm 18 can also move in one-to-one correspondence with the movement of the base 16. The indicating member 19 is formed with a light emitting diode, an incandescent lamp, or a simple pointer, and is fixed to the end of the arm 18 at a position below the position display section 3. As a result, the instruction member 19 moves at a 1:1 ratio below the position display section 3 in correspondence with the movement of the base 16. Therefore, as shown in FIG. 4, the reading position of the disk 8 surface by the reading device 11 is indirectly displayed by the position of the indicating member 19 that can be confirmed from the outside on the position display section 3.

Note that it is convenient to form a translucent scale on the surface of the position display section 3 using acrylic or the like for external reading.

Next, the operation of this embodiment will be explained.

Select the disk 8 you want to play, and press the lid 5.
The disc 8 is raised to expose the inside, and the disc 8 is fixed to the turntable 9. The main body 1 is operated by closing the lid 5 and operating the operating section 2, and the turntable 9 rotates at high speed to cause the disk 8 to follow. At the same time, a laser beam is emitted from the reading device 11 and illuminates the surface of the disk 8, and the reflected light enters the reading device 11 again, and the signal stored on the disk 8 is extracted as an electric signal. In this signal reading operation, if the reading device 11 is stopped at the same position on the circumference of the disk 8, only the same signal can be read.
It must be moved slowly in the radial direction of the By this movement of the reading device 11, the irradiation position of the laser beam can always follow the track on the surface of the disk 8, and signals such as video and audio can be reproduced.

Then, as the reading device 11 moves, the instruction device 1
7 also operates, and the movement of the reading device 11 is one-to-one with this.
This appears as a movement of the pointing member 19 corresponding to the movement of the pointing member 19. Therefore, the reading position of the reading device 11 on the surface of the disk 8 can be confirmed from the position of the indicating member 19 visible from the outside on the position display section 3. Here, if the correspondence between the stored contents of the disk 8 and the scale provided on the position display section 3 is known, it will be easier to search for a reading program.

In this embodiment, the plate-shaped arm 18 is used in the indicating device 17, but the present invention is not limited to this. For example, the indicating member 19 and the base 16 may be connected using a wire mechanism such as a nylon thread or a link mechanism such as a lever. If they are coupled together, the position display section 3 can be formed at any position, not only in the reciprocating direction of the reading device 11.

Since the present invention is configured as described above, it is possible to provide a reading position display device for a disc player that easily and reliably displays the reading position on the disc surface at a low cost. It becomes possible to install a position display device.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the external appearance of the video disc player of the present invention, Fig. 2 is a structural explanatory diagram of its reading device, Fig. 3 is a structural explanatory diagram of the disc player seen from the side, and Fig. 4 is an instruction FIG. 2 is an explanatory diagram of the device. 8...Disk, 11...Reading device, 16...
Base, 17...instruction device.

Claims (1)

[Scope of utility model registration request] A reading device that reads signals stored on the disk surface while moving an optical system formed on a base in the tracking direction of the disk displays the reading position on the disk surface by moving in conjunction with the base. 1. A reading position display device for a disc player, characterized in that the reading position display device is provided with an indicating device.