JPS62197962A - On-vehicle dad reproducing device - Google Patents

Abstract

PURPOSE:To protect a disk from being damaged by loading the disk compulsorily when the disk is in an ejecting state after the turning off of a power source switch. CONSTITUTION:First of all, a timer is set for a prescribed time T accompanying by the turning off of an ignition switch, and at the same time of the setting of the timer, a power source is supplied to, at least, a motor 9 through an another path from the path passing through the ignition switch. And when it is decided that a prescribed time to (it is a little shorter than the time T, for example, 50sec) regulated in advanced after the setting of the timer elapsed, the motor 9 is driven, and a disk 10 is placed under the loading state compulsorily. In this way, it is possible to prevent the disk from being damaged carelessly.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an on-vehicle DAD reproducing device.

(Prior art) A DAD (digital audio) playback device is a CD (digital audio) playback device.
It is used to play back digital information from a disc on which music information is recorded as digital information, such as a compact disc (Compact Disc), and these days, it is often installed in vehicles due to its extremely high playback ability. (Refer to Japanese Patent Application Laid-Open No. 60-55551).

In order to improve the operability of the in-vehicle DAD playback device, it is common to use an electromagnetic actuator to automatically perform ejection and loading. That is, D.A.D.
When the disc is inserted approximately 173 times shallowly into the disc entrance/exit of the playback device, by operating the loading switch or without operating the disc, the disc is automatically stored in the DAD playback device and enters the loading state, and from this loading state, the disc is ejected. When the switch is operated, the disk is automatically pushed out to the disk entrance and exit, and is in an ejected state where it can be grasped from the outside.

(Problem to be Solved by the Invention) Incidentally, although discs are generally quite strong and hard to be damaged, there are many chances of damaging the disc in a small room (indoors). If left as it is, DAD
Since it protrudes considerably larger than the playback device, if it is carelessly touched with a large force, it could be damaged or, in extreme cases, cracked.

Therefore, to prevent damage to the disc, it is desirable to store it in a storage case or the like, for example, when the ignition switch is turned off and there is no intention to use the DAD playback device. However, some drivers may decide not to use the DAD regeneration device, for example after turning off the ignition switch.
Discs are often left in the ejected state, and it is desirable to take measures to protect the discs.

The present invention was made in consideration of the above circumstances, and
An object of the present invention is to provide an on-vehicle DAD reproducing device which can protect a disc by making the disc inaccessible from the outside when there is no intention of using the DAD reproducing device.

(Means and operations for solving the problem) In order to achieve the above-mentioned object, the present invention has the following configuration, that is, an automatic loading mechanism that automatically loads the disc from the ejected state is provided. The in-vehicle DAD playback device is configured to include a loading control means for forcibly loading the disc when the disc is in the ejected state after the power switch is turned off.

In this way, the power supply switch, that is, the ignition switch and the power on/off switch attached to the DAD playback device itself, is turned off and the DAD
D If it is clear that you do not intend to use the playback device,
Since the disk is forcibly loaded, that is, housed within the casing of the DAD playback device, the disk cannot be accessed from the outside, thereby effectively protecting the disk.

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

In FIG. 1, the in-vehicle DAD playback device A is equipped with a disk entrance/exit 2, a main switch 3 for turning on/off power supply, a loading switch 4, an ejecting switch 5 on the front side 1a of its casing 1, and also includes: Although not shown, various conventionally known switches and indicators are provided.

Inside the casing 1, an automatic loading mechanism B is constructed corresponding to the disk entrance/exit 2. This loading mechanism B has a driving roller 6 and a driven roller 7 that are arranged at a small distance from each other at the rear right of the disk entrance/exit 2. The driving roller 6 is connected to a loading motor via a gear mechanism 8. It is connected to 9. As a result, according to the forward or reverse rotation of the motor 9, the disk lO
is loaded or ejected. That is, as in the conventional case, the motor 9 is activated by or without operating the loading switch 4 with the insertion side edge of the disk 10 inserted from the disk entrance 2 positioned within the roller 6.7. For example, if you operate at least the eject switch 5 from this loading state where the disk 6 is automatically rotated in the forward direction and is completely housed in the casing 1, the motor 9 is rotated in the reverse direction, and from the above-mentioned loading state, The disk 6 is in an ejected state in which it is shallowly inserted into the disk entrance/exit port 2.

Reference numeral 11 in FIG. 1 is a control unit constituted by a microcomputer, and this control unit 11 performs various conventionally known controls associated with reproduction of the disc 6, as well as controls according to the present invention. There is. The control contents of the parts related to the present invention by this control unit 11 are explained in the second section.
The control example of the present invention will be explained below with reference to FIG. 2.The flowchart shown in FIG. It is designed to operate when the is turned off.

First, in step Sl, when the ignition switch is turned off, a timer is set for a predetermined time T (for example, 60 seconds), and at the same time as the timer is turned off, at least the motor 9 is It is possible to supply power to

Next, in step S2 or S3, it is determined whether the eject or loading switch 4 or 5 has been operated. When this switch 4 or 5 is operated, the motor 9 is driven in accordance with the operated switch to perform ejection or loading, and then the process moves to step S4. If it is determined in step S4 that a predetermined time to (slightly shorter than the timer set time T, for example 50 seconds) has elapsed after the timer was set in step Sl, the process is forced to step S5. If the predetermined time to has not elapsed, the process returns to step S2.

In step S4, it is determined whether the disc 10 is currently in the ejected state. This determination can be made by appropriately utilizing a DAD playback device, since it is common for the DAD playback device to have a switch that detects the presence of a disc, loading, and ejecting. As a result of the determination in step S5, the current disk 10
When it is determined that the disc 10 is in the eject state, the motor 9 is driven in step S6 to forcibly bring the disc 10 into the loading state. After this, step S
At step 7, the control is terminated by resetting the timer or completely turning off the power supply.

In this way, the predetermined time t after the ignition switch is turned off
Only with o, you can freely eject or load the disc by manual selection,
After the predetermined time to has elapsed, the disk 10 is forced to be in a loading state, that is, to be housed in the casing 1. In addition, when manual selection is made in step S2 or S3, especially when loading operation is performed,
Step S7 without going through step S5.6
You may move to Of course, the manual selection in step S2 or S3 may not be performed. Furthermore, taking into account the time required to forcibly load the timer by separating the link between setting and resetting the timer and turning the power on and off, the time required to continue supplying power to the motor 9 even after the ignition switch is turned off is determined. It can also be set uniformly.

FIG. 3 shows, in block circuit form, a circuit that performs the control shown in FIG. 2 described above.

In FIG. 3, a power supply circuit 21 that controls the power supply to the motor 9 has two input terminals 21, 1 and 2.
a, 21b, and battery power (indicated by +B) is supplied to the first input terminal 21a via the ignition switch IG and the main switch 3, while the second input terminal 21b is supplied with battery power (indicated by +B) via the ignition switch IG and the main switch 3. , both switch IG
and 3 are bypassed so that power is always supplied. Such a power supply circuit 21 normally supplies only power from the first input terminal 21a to the motor 9 via the drive control circuit 22, and while a predetermined signal is input from the hu circuit 23, The power is supplied to the motor 9 (drive control circuit 22) via the second input terminal 21b.

The delay circuit 23 has a function of outputting a signal to the power supply circuit 21 for a predetermined time after the ignition switch IG is turned off, thereby enabling power to be supplied from the second input terminal 21b to the motor 9 side as described above. has. Also,
In FIG. 3, 24 is a control circuit, and 25 is a loading control circuit, and the control circuit 24 outputs a predetermined signal to the loading control circuit 25 when the disk IO is in the eject state. Then, upon receiving the signal from the control circuit 24 and assuming that the delay circuit 23 is operating, the loading control circuit 25 outputs a signal to the drive control circuit 22 to forcibly eject the disk 10. It is designed to load automatically.

Note that when canceling the operation signal from the switch 4.5 after the predetermined time to shown in FIG. The motor 9 may be set not to be driven depending on the operation signal 4.5.

In the above embodiment, the forced loading of the disk 10 is performed after the ignition switch IG is turned off, but it may be performed after the main switch 3 is turned off.

(Effects of the Invention) As is clear from the above description, when there is no intention to use the DAD playback device, the present invention forcibly causes the disc in the ejected state to be coded.
Since the disc is completely housed within the casing of the playback device, it is extremely effective in preventing accidental damage to the disc.

[Brief explanation of drawings]

FIG. 1 is a simplified perspective view showing one embodiment of the present invention. FIG. 2 is a flow chart showing a control example of the present invention; FIG. 3 is a block circuit diagram showing an embodiment of the present invention. A: DAD playback device B: Automatic loading mechanism IG: Ignition switch (for power supply) 2: Disk entrance/exit 3: Main switch (for power supply) 1. Control unit 21: Power supply circuit 22: Drive control circuit 23: Delay circuit 24: Discrimination circuit 25: Loading control circuit

Claims (1)

[Claims] (1) Automotive DAD equipped with an automatic loading mechanism that automatically loads the disc from the ejected state
An in-vehicle DAD playback device, characterized in that the playback device comprises loading control means for forcibly loading the disk when the disk is in an ejected state after the power switch is turned off.