JPH05174562A - Compact disc reproducer - Google Patents

Abstract

PURPOSE:To enable the promotion of an energy saving by using an audio output terminal with a switching for detecting the mounting of a pin plug to generate a warning sound of failure in mounting of a pin plug. CONSTITUTION:An audio output jack 4 with a switch for detecting the mounting of a pin plug is empolyed and connected to an input/output port 5 to always enable detection by a software polling. When the pin plug fails to be mounted on the audio output jack 4 during the reproduction of a music data, a power consumption increases with a music circuit while the consuming of a battery becomes rapid even in an electric starting. Thus, a warning sound about the failure in the mounting of the pin plug is generated to promote the saving of energy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact disc reproducing apparatus capable of reproducing a music disc.

[0002]

2. Description of the Related Art In recent years, a method of easily playing and enjoying music using a compact disc has become mainstream.
In addition, the playback device is also miniaturized and can be driven by a battery without being equipped with an internal speaker, and music can be played by connecting a headphone or an external speaker to the audio output terminal.

[0003]

In the above-mentioned situation, the device main body was normally playing music even when the pin plug was not connected to the audio output terminal during music playing. For example, there is a problem in that the music reproduction circuit is operating even when the music reproduction button is accidentally pressed and the battery is drastically consumed when the battery is driven.

[0004]

In order to solve the above problems, an audio output terminal with a switch is used so that it can be detected at all times, and a warning is given when a pin plug is not inserted in the output terminal during music playback. Generate a warning on the electronic sound and output display screen.

[0005]

With the above structure, by using the audio output terminal equipped with the switch for detecting the pin plug attachment, the battery life is extended when the music is being played when the pin plug is not attached, and the music is reproduced by an erroneous operation. Warning of being audible Generates a warning on the electronic sound and output display screen.

[0006]

EXAMPLE An example of the present invention will be described below. In FIG. 1, 1 is a central processing unit (hereinafter referred to as CPU), 2 is a compact disc (hereinafter referred to as CD) drive, 3 is a music circuit, and 4 is an output terminal jack for external audio output. Reference numeral 5 is a buzzer which is an electronic sound generator. First, when a medium is inserted into the CD drive 2, the TOC (Table of Content) in the lead-in area at the innermost circumference of the medium is first
It is possible to discriminate whether the medium is music data or ROM data by going to the place where the table of contents called s) is written. Next, when the medium is music data, it goes to read an input port determined by an address. here,
FIG. 2 shows the configuration of a headphone jack that is an audio output terminal. The left and right channels of the output from the music circuit are Lch (Left Channel) and Rch (R
light channel), a terminal connected to the input port, and a ground terminal. Whenever the pin plug is not connected, the input port data is pulled up to 5 volts and the digital data is 1. Here, when the pin plug is inserted, the terminal of the input port contacts the ground terminal by a mechanical contact, the input port terminal drops to the ground level, and the digital data becomes zero. As described above, the insertion state of the pin plug can be understood by reading the input port. When it is music data that is read from the input port, it is monitored by polling the input port using software such as an interval timer. Here, when the input port is read during music playback and the pin plug is not attached, that is, when any bit in the pin plug detection port register is 0, a warning electronic sound is generated by setting the bit of the buzzer output port. At the same time, a warning message is displayed on the output screen.

[0007]

According to the present embodiment as described above, when a pin plug is not attached to the audio output jack during the reproduction of music data, the music circuit consumes more power and the battery is drastically consumed even when the battery is driven. Energy saving can be promoted by generating a warning sound that the pin plug is not attached.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a configuration of a compact disc reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram of the jack of this embodiment in FIG.

[Explanation of symbols]

 1 Host 2 CD drive 3 Music circuit 4 Audio output jack 5 Input / output port 6 Buzzer

Claims (2)

[Claims] 1. An output terminal jack with a pin detection switch capable of connecting an external speaker and a headphone without a function of reproducing a music disc and an internal speaker, and a warning output means, and a headphone or an output terminal jack during reproduction of a music disc. A compact disk reproducing device characterized in that a detection switch detects whether or not a pin plug terminal of a speaker is connected, and an electronic warning sound is emitted when music is reproduced with the pin plug not connected. 2. The warning output means according to claim 1, wherein the warning output means is L.
A compact disk reproducing device, which is a display screen of a CD or a CRT, and a warning message is displayed on the screen when music is reproduced without a pin plug being connected.