JPH0772970B2 - In-vehicle DAD playback device - Google Patents

Description

The present invention relates to a vehicle-mounted DAD reproducing device.

(Prior Art) A DAD (digital audio) reproducing device is for reproducing the digital information from a disc such as a CD (compact disc) on which music music is recorded as digital information. From an extremely high point,
It is often mounted on vehicles (Japanese Patent Laid-Open No. 60-5555).
(See Publication No. 1).

Then, in this in-vehicle DAD reproducing device, from the viewpoint of improving its operability, it is general to use an electromagnetic actuator to automatically perform ejection and loading. That is, from the state where the disc is inserted shallowly about 1/3 into the disc entrance of the DAD reproducing device, the disc is automatically loaded into the DAD reproducing device by operating the loading switch or without operating the loading switch, If you operate the eject switch from this loading state,
The disc is automatically pushed out to the disc inlet / outlet, and is in an eject state in which it can be gripped from the outside.

(Problems to be solved by the invention) By the way, although a disc generally has a considerable strength and is not easily scratched, the disc is often damaged in a narrow vehicle compartment. In particular, if the disc is left in the eject state, the DAD playback device will cause it to protrude significantly, so if you inadvertently touch it with a large amount of force, it may cause damage or even cracks in extreme cases. It was.

Therefore, in order to prevent damage, it is desirable to store the disc in a storage case or the like unless the ignition switch is turned off to use the DAD reproducing device. However, depending on the driving vehicle, when it is clear that the driver does not want to use the DAD playback device, for example, after turning off the ignition switch, the disc is often left in the ejected state. Will be desired.

The present invention has been made in consideration of the above circumstances,
It is an object of the present invention to provide a vehicle-mounted DAD reproducing device which can protect the disc by automatically making the disc inaccessible from the outside when there is no intention to use the DAD reproducing device.

(Means and Actions for Solving Problems) In order to achieve the above-mentioned object, the present invention has the following configuration, that is, an automatic loading mechanism for automatically ejecting and loading a disc. In the on-vehicle DAD reproducing device provided, on condition that the power switch is turned off, a power off delay means for supplying power to the automatic loading mechanism for a certain time after the power off, an operation of the power off delay means and the Loading control means for controlling the automatic loading mechanism to forcibly load the disk under the condition of the ejected state of the disk, and, after turning off the power switch, is shorter than the fixed time after the power switch is turned off. During a predetermined time, the loading control means is controlled to force the loading of the disc. It comprises a prohibiting means for stopping, and it is constituted.

In this way, when it is clear that the power supply switch, that is, the ignition switch or the switch for turning on / off the power attached to the DAD reproducing device itself is turned off, and it is clear that there is no intention to use the DAD reproducing device, Since the disc is forcibly loaded, that is, accommodated in the casing of the DAD reproducing device, the disc cannot be contacted from the outside, and the disc is effectively protected.

Moreover, after the power switch is turned off, power can be supplied to the automatic loading mechanism for a fixed time, while forcible loading of the disk is prohibited for a predetermined time shorter than the fixed time. Can allow manual selection of passengers for a predetermined time,
The occupant will be able to determine the state of the disc based on his will. Therefore, it is possible to appropriately respond to various changes in the occupants' consciousness while achieving harmony with the above-mentioned forced protection of the disc.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.

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

An automatic loading mechanism B is formed in the casing 1 so as to correspond to the disk entrance / exit 2. The loading mechanism B has a driving roller 6 and a driven roller 7 which are arranged at a small distance from each other immediately after the disk entrance / exit 2, and the driving roller 6 is provided with a loading motor via a gear mechanism 8. It is connected to 9. As a result, depending on whether the motor 9 rotates normally or reversely, the disk 10
Are loaded or ejected. That is, as in the conventional case, the motor 9 can be operated by operating the loading switch 4 with or without operating the loading switch 4 with the insertion side edge of the disk 10 inserted from the disk inlet / outlet 2 being positioned inside the rollers 6 and 7. For example, when the ejecting switch 5 is operated at least from the loading state in which the disk 6 is automatically stored in the casing 1 by automatically rotating in the forward direction, the motor 9 is rotated in the reverse direction, The disc 6 is in the eject state in which the disc 6 is shallowly inserted into the disc entrance 2.

In FIG. 1, 11 is a control unit composed of a microcomputer, and this control unit 11 is a disk 6
In addition to the conventionally known various controls associated with the reproduction of, the control according to the present invention is also performed. This control unit
The control contents of the part related to the present invention by 11 are shown in the flow chart shown in FIG. 2. The control example of the present invention will be described below with reference to this FIG. 2. The flow chart shown in this FIG. , Is activated when an ignition switch (not shown in FIGS. 1 and 2) is turned off.

First, in step S1, the timer is set to a predetermined time T (for example, as the ignition switch is turned off).
60 seconds), and at the same time as this timer setting, power can be supplied to at least the motor 9 through a route different from the route passing through the ignition switch.

Next, in step S2 or S3, it is determined whether or not the eject or loading switch 4 or 5 has been operated. When the switch 4 or 5 is operated, the motor 9 corresponding to the operated switch
Is driven to perform ejection or loading (see S2-2 and S3-2), and then the process proceeds to step S4. If it is determined in step S4 that the predetermined time t ₀ (a little shorter than the timer setting time T, for example, 50 seconds) has elapsed after the timer was set in step S1, the step is forcibly performed. When the process proceeds to S5 and the predetermined time t ₀ has not elapsed, the process returns to step S2 again.

In step S5, it is determined whether or not the disk 10 is currently in the eject state. This determination is generally made by using a DAD reproducing device which has a switch for detecting the presence / absence of a disc, loading, and ejecting.
If it is determined in step S5 that the disc 10 is currently in the eject state, the motor 9 is driven to force the disc 10 into the loading state in step S6. After that, in step S7, the timer is reset, that is, the power is completely turned off, thereby ending the control.

In this way, after the ignition switch is turned off,
However, while the disc can be ejected or loaded freely by manual selection, the disc 10 is forcibly stored in the loading state, that is, the casing 1 after a predetermined time t _{0 has} elapsed.
In step S2 or S3, when manual selection is made, especially when loading operation is performed, step S2
The process may directly proceed to step S7 without going through steps 5 and 6. Furthermore, considering the time required for forcibly loading by disconnecting the connection between the setting / resetting of the timer and the turning on / off of the power supply, the time for supplying power to the motor 9 even after the ignition switch is turned off is set. It can be set uniformly.

FIG. 3 is a block circuit diagram of a circuit for performing the control shown in FIG. In FIG. 3, a power supply circuit 21 for controlling the power supply to the motor 9
Has first and second two input terminals 21a and 21b, to which the battery power source (denoted by + B) is connected via the ignition switch IG and the main switch 3. While being supplied, the second input terminal 21b is always supplied with power by bypassing both the switches IG and 3. Such a power supply circuit 21
Always supplies only the power source from the first input terminal 21a to the motor 9 through the drive control circuit 22.
Power is supplied to the motor 9 side (drive control circuit 22) via the second input terminal 21b only while a predetermined signal is being input from 23.

The delay circuit 23 outputs a signal to the power supply circuit 21 for a predetermined time after the ignition switch IG is turned off to enable the power supply from the second input terminal 21b to the motor 9 side as described above. Have. Further, in FIG. 3, reference numeral 24 is a discriminating circuit, and 25 is a loading control circuit. The discriminating circuit 24 outputs a predetermined signal to the loading control circuit 25 when the disk 10 is in the ejecting state. Then, the loading control circuit 25 outputs a signal to the drive control circuit 22 on the premise that the signal from the determination circuit 24 is received and the delay circuit 23 is operating to force the disc 10 in the eject state. It is designed to be loaded.

When canceling the operation signals from the switches 4 and 5 after a predetermined time t ₀ shown in FIG. 2, a prohibition circuit for receiving a signal from the delay circuit 23 (a signal corresponding to the elapse of t ₀ ) is provided. The motor 9 may not be driven depending on the operation signals of the switches 4 and 5.

In the above embodiment, the forced loading of the disc 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 apparent from the above description, the present invention forcibly loads the disc in the eject state into the casing of the DAD reproducing device when there is no intention to use the DAD reproducing device. Since I tried to store it completely,
It is extremely effective in preventing the disc from being inadvertently damaged. Moreover, it is possible to appropriately respond to various changes in the occupant's will while maintaining harmony with the above-mentioned forced protection of the disc.

[Brief description of drawings]

 FIG. 1 is a simplified perspective view showing an embodiment of the present invention. FIG. 2 is a flowchart 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: Disc entrance / exit 3: Main switch (for power supply) 11: Control unit 21: Power supply circuit 22: Drive control circuit 23: Delay circuit 24: Discrimination circuit 25: loading control circuit

Continuation of the front page (56) Reference JP-A-59-75458 (JP, A) JP-A-61-190750 (JP, A) JP-A-61-8767 (JP, A) Actual development Sho-60-175389 (JP , U) Actual development Sho 59-17064 (JP, U)

Claims (1)

[Claims] 1. A vehicle-mounted DAD having an automatic loading mechanism for automatically ejecting and loading a disc.
In the reproducing apparatus, on condition that the power switch is turned off, power off delay means for supplying power to the automatic loading mechanism for a certain time after the power off, operation of the power off delay means, and eject state of the disc Under the condition that the automatic loading mechanism is controlled to forcibly load the disc, and the power switch is turned off, a predetermined time period shorter than the predetermined time period after the power switch is turned off. An in-vehicle DAD reproducing device comprising: a prohibiting unit that controls the loading control unit to prohibit the forced loading of the disc.