JPH03119561A - Disk reproduction device - Google Patents

Abstract

PURPOSE:To prevent dust, etc., from penetrating into a device in the midst of reproducing a disk by stopping the start of a control action as long as the opening and closing state of the door of an opening for loading/unloading a cartridge is not detected. CONSTITUTION:By opening the door 23, the opening 22a of a front panel 22 is opened and the cartridge housing a disk is inserted and loaded from the opening 22a. The opening and closing state of the door 23 is detected by the projection 23a of the door 23 and the push button switch 25 of a housing 21 and the control action is not started as long as the opening and closing state is not detected. Therefore, the dust, etc., is surely prevented from penetrating into the disk reproducing device in the midst of reproducing, which occurs because the disk is reproduced in a state where closing the door is overlooked.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a disc playback device, and more particularly to a disc playback device that accommodates a disc cartridge and plays back a disc.

(Prior art) Traditionally, a cartridge containing a disc is housed,
A disc reproducing device that records/reproduces information on a disc is provided with the following front door mechanism.

FIG. 4 is a perspective view showing the structure of this front door mechanism. In the figure, 1 indicates a housing in the device. This housing] has an opening (not shown) for inserting and removing the cartridge 2 containing an optical disc (not shown).
One side of the front panel 3 is constituted by a front panel 3 having a . The front panel 3 is provided with a front door 4 for opening and closing the opening. is supported via a shaft 5. And this front door 4 is
It is pushed against the front panel 3 by a coil spring 6.

Next, the operation of inserting/ejecting the cartridge 2 in a disc playback device equipped with such a front door mechanism will be described with reference to FIG.

First, from the state where the front door 4 is closed (Fig. 5-a)
), when the cartridge 2 is pushed into the housing 1 while being pressed against the front door 4, the front door 4
It is rotated toward the inside of the housing 1 around the center. As a result, the opening of the front panel 3 becomes open, and the cartridge/socket 2 is pushed into the housing 1 as it is.
(Figure 5b).

When the cartridge 2 is pushed into the housing 1, the motor start switch 7 activates the cartridge 2.
The passing of the motor 8 is detected, and rotational driving of the motor 8 is thereby started. The rotation of this motor 8 is controlled by a worm 9, a gear 1
The rotation is transmitted to the cartridge 2 via a motor rotation transmission mechanism such as 0, and thereby the cartridge 2 is further inserted into the interior of the housing 1 (FIG. 5-C).

When the motor stop switch 11 detects that the cartridge 2 has reached a predetermined disc playback position, the rotation of the motor 8 is stopped and the cartridge 2 is brought to a stopped state (FIG. 5-d).

Disc playback is performed in this state.

However, at this time, the front door 4 remains pushed up by the cartridge 2.

When the cartridge 2 is to be ejected, one end of the cartridge 2 is projected from the opening 3a of the front panel 3 by rotating the motor 8 in the reverse direction and causing the cartridge 2 to run backwards.

Thereafter, the cartridge 2 is further pulled out, and the front door 4 is closed when the cartridge 2 is completely ejected.

However, the following problems remain in disc playback devices having such a front door mechanism.

That is, if the front door 4 is left open even during disk playback, more dust and the like will enter the inside of the apparatus, making it more likely that the optical path will be obstructed by this dust and the like.

As a result, there was a fear that the stability of disc playback would be significantly reduced.

(Problem to be solved by the invention) As described above, if the cartridge loading/unloading opening is left open during disc playback, dust etc. may enter the inside of the device.
This was one of the causes that had a great negative effect on disc playback.

The present invention is intended to solve these problems, and aims to provide a disc playback device that can prevent dust and the like from entering the inside of the device during disc playback.

Structure of the Invention (Means for Solving the Problems) In order to achieve the above-mentioned object, the disc reproducing device of the present invention accommodates a storage unit containing a disc and reproduces information on the disc. A disc playback device that performs this type of playback includes a housing having an opening for taking in and taking out a cartridge, a door for opening and closing the opening of the housing, and a switch that detects the open/closed state of this door, and the switch detects the closed state of the door. The control operation is not started unless detected.

(Function) In the disc playback device of the present invention, the control operation is not started unless the switch detects that the door is closed. This prevents damage to the inside of the device during disc playback, especially due to forgetting to close the door. The intrusion of dust and the like can be prevented, and the stability of disc playback can be improved.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a perspective view showing the configuration of a front door mechanism in a disc playback device according to an embodiment of the present invention.

In the figure, 2] indicates the housing of the disc playback device. One side of the housing 21 is constituted by a front panel 22 having four parts 22b each having an opening 22a for inserting and removing a cartridge (not shown) containing an optical disk (not shown). On the outside of this front panel 22, an opening 22a is opened and closed, and a recess 22 is provided.
It is rotatably mounted by a door 23 that can be fitted into the front panel 22 or by a shaft 24 supported at both ends by the front panel 22. One end of this door 23 is bent in an abbreviated shape toward the front side of the device, and by placing your finger on this bend and pulling it toward you, the door 23 can be removed from the four parts 22b with the foot 24 at the center. It is designed so that it can be rotated and opened.

On the other hand, a push button switch 25 for detecting whether the door 23 is open or closed is provided in the recess 22b of the front panel 22. This push button switch 25 detects the closed state of the door 23 by being pressed by a protrusion 23a provided inside the door 2B.

Moreover, the four parts 22 are arranged along the direction of the axis 24 at the upper part of the opening 22a of the four parts 22b formed in the front panel 22.
A magnet plate 26 is embedded between the ends of b. On the other hand, correspondingly, a magnet plate 26 is provided inside the door 2B.
A long iron plate 27 that is attracted by the door 23 is embedded between one end of the door 23 along the direction of the axis 24.

Next, the operation of inserting/ejecting a cartridge in a disc playback device equipped with this front door mechanism will be described with reference to FIG.

First, from the state where the opening 22a of the front panel 22 or the door 23 is closed (Fig. 2-a), put your finger on the bent part of the door 23 and resist the attraction magnetic force between the magnet plate 26 and the iron plate 27. Pull the door 23 toward you (thereby, the door 23 is rotated about the shaft 24 and opened.

When the door 23 is opened, the cartridge K is pushed into the housing 2 through the opening 22a of the front panel 22 (FIG. 2-b).

On the other hand, the door 23 is closed by removing the finger from the door 23 after the cartridge K has been inserted to a certain extent. Then, the push-button switch 25 is pressed by the protrusion 23a on the inside of the door 23, and as a result, the push-button switch 25 tells the control system of the disc playback device that the door 23 is in the closed state with respect to the opening 22a. A detection signal is output to indicate that this has occurred.

Only then will the control operation in the disc playback device begin.

In this control operation, passage of the cartridge is detected by the motor starting switch 28.

When the passage of the cartridge is detected, rotation of the motor 29 is started. The rotation of the motor 29 is transmitted to the cartridge K via a motor rotation transmission mechanism such as a worm 30 and a gear 31, whereby the cartridge K is drawn further into the housing 21.

When the motor stop switch 32 detects that the cartridge K has reached a predetermined disc playback position, the rotation of the motor 29 is stopped and the cartridge is placed in a stopped state (FIG. 2--).

Thereafter, information on the disc contained in the cartridge K is reproduced.

When ejecting the cartridge K, the motor 29 is rotated in the reverse direction to cause the cartridge K to run in the reverse direction. Then, the door 23 is rotated outward due to pressure from the inside due to the movement of the cartridge and is opened.

As a result, the cartridge K is ejected from the housing 21 (FIG. 2-d).

Thus, according to the disc playback device of this embodiment, the opening 22a of the front panel 22 can be completely closed except when loading or unloading the cartridge, thereby significantly preventing dust and the like from entering through the opening 22a. It becomes possible to reduce the amount.

Furthermore, since the control operation of the disc playback device cannot be started unless the door 23 is completely closed with respect to the opening 22a, forgetting to close the door 23 can be prevented.

With the above, it is possible to prevent the negative influence of dust and the like on disk reproduction.

In the above embodiment, the magnetic plate 26 is used as a means for keeping the door 23 closed, but various other variations can be considered as this means.

For example, as shown in FIG. 3, there is a lever 3 inside the door 23.
], and a lock slider 33 that is always urged downward by a spring 32 is provided on the front panel 22, and when the door 23 is closed, the lock slider 33 locks the lever 31, thereby locking the door 23. It may be kept in the closed state.

Furthermore, in the above embodiment, the magnet plate 26 is embedded in one direction along the direction of the axis 24 in the upper part of the opening 22a of the front panel 22, but for example, in order to prevent intrusion of dust etc. Since adhesion is required, the magnetic plate 26 is placed around the door 23.
and iron plate 27 may be embedded respectively.

Furthermore, if a bellows-type plastic magnet, such as that used for the doors of refrigerators, is used, the adhesion can be further improved.

[Effects of the Invention] As explained above, according to the disc playback device of the present invention, the control operation is not started unless the switch detects that the door is in the closed state. This makes it possible to prevent dust and the like from entering the inside of the device during disc playback, thereby increasing the stability of disc playback.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a front door mechanism of a disc playback device according to an embodiment of the present invention, FIG. 2 is a sectional view showing the flow of cartridge insertion/ejection in the disc playback device of FIG. 1, and FIG. FIG. 4 is a side view for explaining another embodiment of the present invention, and FIGS. 4 and 5 are a perspective view and a sectional view, respectively, for explaining the front door mechanism of a conventional disc playback device. 21... Housing, 22... Front panel, 22a.
...Opening, 23...Door, 23a...Protrusion, 25.
...Push button switch, K...cartridge.

Claims (1)

[Scope of Claims] A disc playback device that houses a cartridge containing a disc and plays back information on the disc, comprising: a housing having an opening for taking in and taking out the cartridge; and a housing for opening and closing the opening of the housing. A disc playback device comprising: a door; and a switch for detecting an open/closed state of the door, and a control operation is not started unless the switch detects an open/closed state of the door.