JPH0323582A - Lighting system - Google Patents

Abstract

PURPOSE:To extinguish the illumination for an insertion hole at the time of inserting a recording medium to prevent the rise of temperature of the recording medium by detecting insertion of the recording medium to control this illumination. CONSTITUTION:A detecting circuit 7 which detects loading/unloading of a recording medium 13 to/from an insertion hole 12 is connected to a control circuit 5, and an illumination lamp 3 for the insertion hole is controlled by the insertion detection signal of the recording medium 13 independently of the recording/ reproducing operation of the recording medium 13. Insertion of the recording medium 13 is detected by the detecting circuit 7, and the control circuit 5 is made conductive by this insertion detection signal to operate a switch circuit 4, and the illumination lamp 3 for the insertion hole is controlled. Thus, the illumination for the insertion hole is extinguished at the time of inserting the recording medium 13 to the insertion hole to prevent the rise of temperature of the recording medium 13.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a lighting device for a vehicle-mounted audio device. [Prior Art] Figure 4 is a block diagram showing an example of a power supply circuit for a lighting device in a conventional car-mounted radio with a cassette deck. In the figure, (1) is the battery, (is a switch circuit that turns on and off the car's lighting system, (G) is the illumination light for the recording medium insertion slot of the in-vehicle audio system, and (4) is the during operation of the recording medium playback device. A switch circuit for turning off the light (3) in the insertion slot, a control circuit for operating the switch circuit (4), and a lighting circuit (6) for illuminating the operation button of the in-vehicle audio system. . The lighting device of a conventional car-mounted audio device has an oval configuration as described above, and when the switch circuit 0 of the car lighting device is turned on, the switch 1-3 f41 of the lighting lamp (3) in the insertion slot is energized. The illumination light (3) of the insertion slot is set in a state where it can be turned on, and the illumination circuit (6) of the operation button is energized to turn on the illumination of the operation button.
The illumination light (3) of the insertion port is turned on and off by turning on or off the control circuit (control switch) and sending a signal.

Fig. 5 is a block diagram of the conventional in-vehicle audio lighting system shown in Fig. 4, with the operation button lighting circuit (6) omitted, and a cassette tape is used as the recording medium. An example is shown below. In this figure, (
11 is the battery, (2l is the power switch for the car's lighting system, (3) is the illumination light for the recording medium insertion slot, and (4) is the illumination light 0 for the recording medium insertion slot connected to the power switch (2).
) is a switch circuit consisting of a transistor that turns on and off the switch circuit (4). One transistor (5a) of this control circuit (51) has its base terminal connected to the battery (1), its collector terminal connected to the base terminal of the transistor of the switch circuit (4), and its emitter terminal connected to the other transistor (5b). The other transistor (5b) in the control circuit has its base terminal connected to the battery (1), and its emitter terminal is grounded. (8) is the ignition switch, (9) is the power switch for the in-vehicle audio system, 0ω is the power switch for the cassette deck and radio, and <<l4> is the radio circuit.
In the illumination system of the car-mounted audio system that is elliptical as shown in Fig. 5, when the power switch (2) is turned on, the switch circuit (4) of the illumination light (3) in the insertion slot is turned on, and the illumination of the insertion slot is turned on. Light (3) lights up. Turn on the ignition switch (8), turn on the power source (9) of the in-vehicle audio system, and switch the radio/cassette deck power selector switch 00 to the cassette deck side, both transistors (5a) (5
b) is turned on, and the light (3) in the insertion slot is turned off. [Problems to be Solved by the Invention] In the conventional lighting device of the in-vehicle audio device as described above, when the signal recorded on the recording medium is being reproduced or the recording medium is being operated, that is, when the recording medium reproducing circuit is Switch circuit for recording medium playback circuit only when power is supplied (4)
was controlled by the control circuit (4) to turn off the illumination light (3) in the insertion slot.In other words, when the car audio system was turned off or the radio was operating, the insertion slot was turned off even when a recording medium was inserted. There is a mode in which the illumination light (3) of the insertion slot is turned on, and in such a case, the illumination light (3) of the insertion slot is always turned on.
3) was lit. Therefore, there is a problem in that the temperature of the recording medium is inadvertently raised due to the illumination lamp (3) ripening. The present invention has been made to solve this problem, and is an in-vehicle audio device that turns off the light in the insertion slot when a recording medium is inserted into the insertion slot, thereby preventing the temperature of the recording medium from rising. The purpose is to obtain a lighting device. [Means for Solving the Problems] In the lighting device of the in-vehicle audio device according to the present invention, a detection circuit is provided to detect insertion/removal of a recording medium into the insertion slot and generate a signal, and the lighting device of the insertion slot This is connected to the light's control I/roll circuit. [Effect] The lighting system of the car-mounted sound system that has been banned as described above is
The detection circuit detects that a recording medium has been inserted, and this insertion detection signal causes the control circuit to conduct, activating the switch circuit and controlling the light in the insertion slot. [Embodiment] Figure 1 is a block diagram showing an embodiment of the present invention. In this figure, the same reference numerals are given to the parts corresponding to the lighting devices of the conventional car-mounted audio system shown in FIG. (7) is a detection circuit that detects insertion/removal of a recording medium. FIG. 2 is a circuit diagram of the block diagram shown in FIG. 1, with the illumination circuit (6) for the operation button omitted, and shows an example in which a cassette tape is used as a recording medium. Components that correspond to the lighting devices of the conventional in-vehicle audio system shown in are given the same reference numerals. FIG. 3 is a perspective view showing the main parts of the in-vehicle audio system for explaining the operation of the circuit diagram in FIG. 2. In this embodiment, the detection circuit (7) for detecting insertion/removal of the cassette tape uses a photointerrupter consisting of a light emitting section (7a) and a light receiving section (7b).

(11) is an in-vehicle audio device, which in this embodiment is a cassette deck. (12) is a cassette deck (1
1) Cassette tape insertion slot provided in (l3)
is a recording medium, which in this example is a cassette tape. In the lighting system of the in-vehicle audio system configured as described above, when the car's lighting switch (2) is first turned on, the photointerrupter (7) will turn on when the cassette tape (l3) is not inserted. The light from the light emitting part (7a) is transmitted to the light receiving part (
7b), the transistor 1-1 of the light receiving section (7b) turns on, and the signal turns on the control circuit if51.
The transistor in the switch circuit is turned off, and the transistor in the switch circuit (opening) is controlled to control the illumination light (3) in the insertion slot, and the fish light (O) is turned on. Next, as shown in Figure 3, insert the cassette l/tape insertion slot (l2) of the cassette deck (11).
), when the cassette tape (l3) is inserted, the cassette tape blocks the light from the light emitting part (7a) of the photointerrupter near the insertion date, so the phototransistor of the light receiving part (7b) of the photointerrupter is turned off, and the signal turns on the control I-roll circuit (transistor 51), which controls the transistor in the switch circuit ←1 to turn off the light. As described above, according to the present invention, it is possible to always turn off the light in the insertion slot when a cassette tape is inserted, regardless of the playback operation of the in-vehicle audio device. In the above embodiment, the case where the recording medium is a cassette tape has been described, but the present invention can be similarly applied to an audio apparatus using other types of recording media such as a Combat I disc or a DAT. Furthermore, although a case has been described in which a photointerrupter is used as the detector of the detection circuit (7), a mechanical switch or the like may also be used. [Effects of the Invention] Since the present invention has an oval structure as described above, it is possible to detect the insertion of a recording medium and control the illumination of the insertion slot. It is now possible to turn off the light in the insertion slot when a medium is inserted, which prevents the temperature of the recording medium from rising.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a lighting device for an in-vehicle sweat sound device according to an embodiment of the present invention, FIG. 2 is a circuit diagram of FIG. 1, and FIG. 3 is an in-vehicle device for explaining an embodiment of the present invention. FIG. 4 is a block diagram of a lighting device of a conventional vehicle-mounted audio device, and FIG. 4 is a circuit diagram of FIG. 4. In the figure, (3) is the illumination light of the insertion slot, (4) is the switch circuit of the illumination light, (the control circuit is the control circuit, (7) is the photo 1 interrupter as a detection circuit, and (1l) is the vehicle-mounted line blue. The device is a cassette deck, (12) is an insertion slot, and (13) is a cassette tape as a recording medium. In each figure, the same reference numerals indicate the same or corresponding parts. Fig. 1

Claims (1)

[Claims] In the lighting device, a control circuit is connected to a switch circuit of a lighting lamp in an insertion port of an in-vehicle audio device in which a recording medium on which a signal is recorded is inserted through an insertion port and the signal recorded on the recording medium is reproduced. A detection circuit for detecting the insertion/removal of a recording medium from the insertion slot is connected to the control circuit, and the illumination light of the insertion slot is controlled by the recording medium insertion detection signal regardless of the recording or playback operation of the recording medium. A lighting device characterized by: