JPS6112278Y2 - - Google Patents

Description

[Detailed explanation of the idea] TECHNICAL FIELD The present invention relates to an improvement in a warning device for automobiles.

In recent years, alarms have been introduced in automobiles to alert occupants by emitting an audible alarm when, for example, they forget to turn off the lights when the ignition key is removed, forget to apply the handbrake, or when various other devices are not in proper condition. The device has been put into practical use.

In this type of alarm system, especially when the door of a passenger car is closed, the interior of the passenger car is highly sound insulated from the outside, so if the volume of the alarm sound is set too high, the alarm sound may be unpleasant for the occupants. On the other hand, if the volume of the above-mentioned alarm sound is set too low, there is a problem that the occupants may not notice the alarm sound due to the noise outside the vehicle when the cabin door is open. Ta.

The present invention was devised in view of the above, and includes a detection circuit that detects whether or not various devices are in a proper state, and an alarm sound generating device that is activated by the detection circuit and generates an alarm sound. In a device configured to generate the above-mentioned alarm sound when various devices are not in a proper state, the volume of the supervisory alarm sound is set to be lower than when the door is closed by detecting the open state of the vehicle interior door. The gist of the present invention is an automobile alarm device characterized by being equipped with a volume switching circuit for increasing the volume.

According to the present invention, the volume of the alarm sound can be set to be suitable for when the door is closed and when the door is opened, thereby solving the problems of the conventional device.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the figure, reference numeral 2 denotes a well-known detection circuit (not shown) that generates a signal current when the ignition key is removed, the light is forgotten to be turned off, the handbrake is forgotten to be applied, or other various devices are not in the proper state. Reference numeral 5 designates a well-known audio current generation circuit which receives the signal current from the detection circuit 2 and generates an audio current such as a chime sound or an alarm sound, and 5 designates a volume switching circuit. In the same volume switching circuit 5, 6 is a resistor with one end connected to the audio current generating circuit 4 and the other end connected to the ground 7, through which the audio current flows, and 8 and 10 are terminals connected to the resistor 6 at positions apart from each other. , 12 is brought into contact with the terminal 8 by the biasing force of an elastic member (not shown), and also includes an electromagnetic coil 14, which will be described later.
16 is an amplifier connected to the movable section 12, and 18 is a speaker connected to the amplifier 16. 20 is a door switch (not shown) that opens when the door is closed and closes when the door is not closed; 24 is the power source; and 26 is the door switch 2.
This is a well-known warning lamp that lights up when the door installed between the door switch 22 and the power source 24 is not closed, and the above-mentioned electromagnetic coil 14 is installed in parallel with the lamp 26 between the door switch 22 and the power source 24. There is.

According to the above configuration, the detection circuit 2 generates a signal current when the various devices described above are not in a proper state,
The audio current generating circuit 4 generates an audio current, but if the door is closed at this time, the movable section 12 contacts the terminal 8 as shown in the figure, and the input voltage of the amplifier 16 increases from the terminal 8 to the ground 7. If the door is not closed, the movable segment 12 is attracted to the electromagnetic coil 14 and comes into contact with the terminal 10, and the input voltage of the amplifier 16 is equal to the potential difference between the terminal 10 and the ground 7. Become something.

Therefore, when various devices are not in proper condition, the volume of the alarm sound emitted from the speaker 18 is louder when the door is open than when the door is closed. Since settings can be made to suit each case, the above-mentioned problems of the conventional device can be solved.

Further, in this embodiment, the switch 20 for detecting the opening/closing of the door is also used as a switch for lighting the well-known warning lamp 26, so that it can be implemented at low cost. Therefore, it is also possible to separately provide a switch for detecting the opening and closing of the door, although this increases the cost somewhat.

[Brief explanation of the drawing]

The figure is a circuit diagram showing an embodiment of the present invention. 2...Detection circuit, 4...Audio current generation circuit, 5
...Audio switching circuit.

Claims (1)

[Scope of utility model registration request] It has a detection circuit that detects whether or not various devices are in a proper state, and an alarm sound generating device that is activated by the detection circuit and generates an alarm sound, and when the various devices are not in a proper state, the alarm sound is emitted. The vehicle is configured to generate an alarm sound, characterized by comprising a volume switching circuit that detects the open state of the vehicle interior door and increases the volume of the alarm sound compared to when the door is closed. Automobile warning device.