JPH0614319Y2 - Tray movement time adjustment device for disk transport mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a disc transport mechanism of a disc player of a disc player for playing a video disc or a digital audio disc, and more particularly to a front loading disc player. The present invention relates to a tray movement time adjusting device suitable for a disc transport mechanism.

(B) Conventional Technology Conventionally, as this type of disk transport mechanism, there is one configured as shown in FIGS. 4 and 5, for example.

Although not shown, the disc transfer mechanism shown in FIGS. 4 and 5 is housed in a player housing which has a rotation drive means for rotating a disc therein and an opening is formed in the front panel. There is.

Further, the player housing is provided with a tray 1 configured to automatically protrude from the opening to the outside and be housed inside.

The tray 1 automatically moves between a projecting position, which is projected from the opening of the front panel to the outside of the player housing, and a storage position (disc playing position), which is pulled into the player housing. After the disk is placed at the position and the disk is pulled to the storage position, the disk is moved up and down relative to the rotary drive means to remove the disk from the rotary drive means.

Further, as a means for mounting the disc on the rotary drive means, it is arranged so as to face the rotary drive means, and when the disc is mounted on the rotary drive means, the disc is held relatively against the rotary drive means. And a pressing member that is sandwiched between the rotation driving means and the rotation driving means.

In FIG. 4, 2 is a drive motor for moving the tray 1 as described above, 3 is a microcomputer for controlling the tray 1 and the like, and 4 is a sensor switch for detecting the storage position of the tray 1. Reference numeral 5 is a sensor switch for detecting the protruding position of the tray 1.

(C) Problems to be solved by the invention However, in the above-mentioned conventional disc transfer mechanism,
The drive motor 2 (in the case of a DC motor) of the tray 1 is usually driven by a constant DC voltage. Therefore, there is a drawback in that the movement speed of the tray changes due to variations in the mechanism that constitutes the disk transport mechanism and changes over time. In particular, the change over time of the mechanism has been a problem that cannot be avoided even if adjustment is performed during manufacturing.

The present invention has been made in view of the above problems of the conventional technique, and an object thereof is to move the tray even if there is a variation or a change over time in the mechanism that constitutes the disk transport mechanism. It is an object of the present invention to provide a tray moving time adjusting device for a disk transport mechanism, which is automatically adjusted to a predetermined tray moving operation time by repeating the operation and can maintain the initial performance for a long time.

(D) Means for Solving the Problem FIG. 1 is a functional block diagram showing the configuration of the present invention. In order to achieve the above object, the tray moving time adjusting device of the disk transport mechanism in the present invention is a disk In a disc transport mechanism for automatically transporting a disc to a playing position, a moving reference time setting means A for presetting a moving time serving as a reference when the tray moves between a projecting position and a storage position (playing position), The measuring means B for measuring the moving time required when the tray actually moves between the projecting position and the storage position, the actual moving time of the tray measured by the measuring means B and the preset moving reference time are set. Based on the comparison means C for comparison and the comparison result of the comparison means C, the movement time correction for outputting the information signal for correcting the movement time data of the tray to the tray drive motor control means E. And means D.

(E) Action The measuring means B measures the time required for the tray to actually move between the protruding position and the storage position, and sends the measured actual movement time information signal to the comparing means C.

The comparison means C compares with a preset movement reference time of the tray.

The movement time correction means D outputs an information signal for correcting the tray movement time data to the tray drive motor control means E based on the comparison result of the comparison means C.

Therefore, the drive voltage set based on the corrected time data is applied to the tray drive motor from the next time the tray is moved.

(F) Examples Examples will be described with reference to the drawings.

In FIGS. 1 and 2, when a tray open / close switch (not shown) is pressed, the microcomputer 3 receives the tray open / close command (step S1) and outputs a drive signal to the tray drive motor 2 (step S2). ).

The microcomputer 3 outputs the drive signal and simultaneously starts the counter (step S3).

On the other hand, the tray 1 moves from the protruding position to the storage position (or
Then, the storage position detecting switch 4 (or the protruding position detecting switch 5) is pushed (step S4).

The microcomputer 3 reads the value of the counter when it receives the sensor signal from the detection switch 4 (or 5) (step S5).

Then, the microcomputer 3 compares the preset movement reference time of the tray 1 with the value of the read counter (step S6).

Based on the comparison result, the moving time data between the protruding position of the tray 1 and the storage position is corrected (step S).
7 or S8).

Therefore, next time the tray 1 is moved, the tray drive motor 2 can be driven by the drive voltage set based on the corrected time data, and the tray moving speed can be kept constant. .

The drive voltage of the tray drive motor 2 can be adjusted by some method. For example, when the tray drive motor 2 is a DC motor, it is driven by a PWM power source,
There is a method of changing the drive voltage by changing the duty ratio of the pulse.

In addition, since most of the structure of this invention depends on software, there are few external parts, and it is easy to change the movement reference time value of the tray, etc. Is easy.

(G) Advantageous Effect of the Invention Since the present invention is configured as described above, the tray moving time can be kept constant even if there is a variation in the mechanism that constitutes the disc transport mechanism or a change over time.

Further, the tray moving time adjusting function of the disk carrier of the present invention largely depends on the software of the microcomputer incorporated in the disk player, and the function can be increased without increasing the cost.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing the configuration of the present invention, FIG. 2 is a block diagram showing a schematic configuration of an embodiment of the present invention, and FIG. 3 is a flow chart diagram of an embodiment of the present invention. FIG. 4 is a block diagram of the conventional example, and FIG. 5 is a flowchart of the conventional example. Explanation of reference numerals of main parts A: Tray movement reference time setting means B: Tray actual movement time measurement means C: Comparison means D: Tray movement time correction means E: Tray drive motor control means 1: Tray 2: Tray drive Motor 3: Microcomputer

Claims (1)

[Scope of utility model registration request] 1. A player housing having a rotation driving means for rotating a disc therein and having an opening formed in a front panel, and a projecting position projected from the opening of the front panel to the outside of the player housing. After moving to and from the storage position retracted inside the player housing, the disc is placed at the projecting position, retracted to the storage position, and then moved up and down relative to the rotation drive means to rotate. A tray for loading and unloading the disc to and from the drive means is arranged so as to face the rotary drive means, and when the disc is mounted on the rotary drive means, the disc is pressed relative to the rotary drive means to rotate the disc. Disc of a front-loading disc player, which is provided with a pressing member that is clamped between the driving unit and the disc. In the feeding mechanism, the movement reference time setting means for setting a movement time serving as a reference when moving between the tray protruding position and the storage position, and the actual movement time between the tray protruding position and the storage position are set. Measuring means for measuring, comparing means for comparing the actual moving time of the tray measured by the measuring means with a preset moving reference time, and the tray drive motor control means for transferring the tray to the tray drive motor control means based on the comparison result of the comparing means. Tray moving time adjusting device of a disk transport mechanism, which comprises moving time correcting means for outputting an information signal for correcting the moving time of the disk.