JPH0424522Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention relates to a DAD player, and particularly to a DAD player that is easy to operate after disc playback is finished.

(b) Prior art A conventional DAD player has a tray that opens when a disc is loaded and is retracted and closed when playing a disc, an open switch that indicates when the tray is completely open, and an open/close key that opens and closes the tray. When installing or removing a disk, the tray remained open unless the tray was pushed or closed using the open/close key.

(c) Problems that the invention attempts to solve However, in such a DAD player,
If the tray was left set to open by operating the open/close key, the disc would become scratched or dusty, which could impair the sound quality during playback. Additionally, depending on where the equipment is installed, the tray may protrude, so there is a risk of accidental contact and damage to the equipment.

This invention eliminates the drawbacks of the conventional example,
The purpose is to provide a DAD player.

(d) Means for solving the problem The DAD player according to the present invention has a tray that opens when a disc is loaded and is retracted and closed when playing a disc, and an open switch that indicates that the tray is completely opened. In a DAD player configured to close the tray when the open/close key opens and closes the tray and the open switch changes from on to off, the open/close key opens and closes the tray after a preset time has elapsed while the open switch is on. The device is characterized by being provided with an open/close switch circuit that turns off the switch.

(E) Effect As shown in the flowcharts in Figures 2 [a] and [b], in this invention, by providing an open/close switch circuit consisting of a timer and a switch, the tray open switch is turned on and the tray is opened. When it is fully opened, the timer starts counting.
When the timer starts counting in this manner, the open switch signal is turned off when the preset time has elapsed, so that the tray is automatically closed.

(f) Embodiment An embodiment of this invention will be explained with reference to FIG. 1. A tray 1 for loading and unloading disks,
A DAD player comprising an open switch 12 indicating that the tray 1 is completely open, and an opening/closing key 5 for opening and closing the tray, a timer 13 that outputs a signal to turn off the signal of the open switch 12, and the timer. an open/close switch circuit 15 consisting of a switch circuit 14 for turning off the open switch signal;
This is a DAD player characterized by having the following features:

Conventional DAD players consist of a tray that opens when a disc is loaded and is retracted and closed when playing a disc, an open switch that indicates when the tray is fully open, and an open/close key that opens and closes the tray. Therefore, when the tray was opened using the opening/closing key to install or remove a disk, the tray remained open.

In this invention, as shown in the flowcharts of FIGS. 2A and 2B, by providing an open/close switch circuit 15 consisting of a timer 13 and a switch 14, the open switch 5 of the tray 1 is turned on. When tray 1 is fully opened, timer 13
starts counting. When the timer starts counting in this manner, the timer automatically turns off the opening/closing switch circuit when the preset time has elapsed, so that the tray 1 is closed.

Further, as another embodiment, the timer 13 can be replaced with the one shown in FIG. 3, and the same effect can be achieved.

(g) Effects of the invention As described above, according to this invention, even if the tray is left open by operating the open/close key, the tray will automatically close after a certain period of time, just like the tray of a DAD player opens. is less likely to get scratches or dust. Additionally, since the tray automatically closes after a certain period of time, there is no risk of damage to the device due to accidental contact with the tray.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a DAD player according to this invention, Fig. 2 is a flowchart for explanation, Fig. 3 is another embodiment of the timer section, and Fig. 4 is a block diagram of a conventional DAD player. . 1... Tray, 2... Disk, 3... Tray motor, 5... Open/close key, 12... Open switch, 13... Timer, 14... Switch circuit, 15... Open/close switch circuit.

Claims (1)

[Claims for Utility Model Registration] A tray that opens when a disc is loaded and is retracted and closed when playing a disc, an open switch that indicates that the tray is completely opened, an opening/closing key that opens and closes the tray; In a DAD player configured to close the tray when the open switch changes from on to off, an open/close switch circuit is provided that turns off the open switch after a preset time has elapsed while the open switch is on. A DAD player that features: