JPS5813437Y2 - Vehicle warning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle alarm system, and particularly to a vehicle alarm system that issues multiple types of alarms with a single sounding element.

As shown in FIG. 1A, a conventional vehicle alarm system connects a plurality of alarm devices 3A, 3B, 3C, etc. such as buzzers or chimes to a power terminal 1 via an ignition switch 2, and An alarm detection switch 4A is connected in series to each alarm device.

It had 4B and 4C.

The detection switch 4A is a speed detection switch that closes when the vehicle speed reaches, for example, 1100 K/H, and at this time the alarm 3A sounds to give a warning to the driver.

The detection switch 4B is a seatbelt switch that is closed when the driver is seated and the vehicle starts. At this time, the alarm 3B sounds for a certain period of time determined by the timer 11 to prompt the driver to fasten his or her seatbelt.

The detection switch 4c is a back switch that closes when the shift lever is switched to the back position, and at this time the alarm 3
c sounds to let the driver confirm its location.

In addition, there is an alarm device to prevent forgetting to turn off the light, and since this does not operate when the ignition switch 2 is closed, it is configured as shown in Figure 1B. When the light 6 is on, when the ignition switch 2 is opened and the door switch 7 is closed (the driver removes the ignition key and exits the vehicle), current flows to the alarm 10 through the diode 8 and resistor 9, and the alarm is activated. The instrument 10 makes a sound.

As described above, in the conventional vehicle alarm device, each alarm 3 corresponds to the detection switches 4A, 4B, 4C, and 7.
A, 3B, 3C, and 10 were provided, so the number of alarms required corresponds to the number of detection switches.

In particular, the above-mentioned warning device does not issue any of warning operations such as a speed warning, a seatbelt warning, a back position warning, and a forget-to-turn-off warning at the same time.

In such an alarm device, it is uneconomical to provide an alarm for each detection switch, that is, for each alarm content.

In view of the above points, the present invention is designed to issue multiple types of alarms with a single sounding device, by connecting multiple alarm detection switches to the drive circuit of one alarm device to generate an alarm, and to distinguish between the alarm sounds. To provide a vehicle alarm device in which the sound pressure of an alarm sound is changed by flowing current to the alarm device through a resistor for alarms that need to be issued.

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

FIG. 2 shows an electrical circuit diagram of an embodiment of the vehicle alarm system according to the present invention.

In the figure, 30 is a common alarm, the positive side of which is connected to the power terminal 21 of 10 through a backflow blocking diode 31 and an ignition switch 22, or via a backflow blocking diode 32 and a light switch 25. , the negative electrode side is grounded through detection switches such as a speed detection switch 24A, a seatbelt switch 24B, and a back switch 24C.

Also, the negative electrode side of this alarm 30 is a backflow blocking diode 2.
8. Door switch (forgetting to turn off the light detection switch) 27
and is grounded via a resistor 29, and a connection point between the door switch 27 and the resistor 29 is connected to a connection point between the ignition switch 22 and the diode 31.

The headlamp 26 is connected between the connection point between the light switch 25 and the diode 32 and the ground.

33 is a seat belt timer.

In the vehicle alarm system configured as described above, when the ignition switch 22 is closed, the detection switches 24A-
24C is closed, the alarm 30 sounds.

For example, when the vehicle speed exceeds 100 Km/H and the speed detection switch 24A is closed, the alarm 30 is activated.

Further, when the seat belt switch 24B is closed when the driver gets into the vehicle, the alarm 30 is activated for a certain period of time set by the seat belt timer 33.

Furthermore, when the shift lever is switched to the reverse position and the bank switch 24C is closed, the alarm 30 is activated.

When each of these detection switches closes, none of the other detection switches are in a state of closing, so the driver recognizes that one of the detection switches has been issued by the sound of the alarm 30.

If the ignition switch 22 is closed, the alarm 30 will activate the alarm when any one of the detection switches 24A to 24C is closed, regardless of whether the headlight 26 is on or off. .

At this time, even if the door switch 27 is closed, the door switch 27
Since the potential at the connection point between the door switch 27 and the resistor 29 is high, the alarm 30 is not activated by closing the door switch 27, and due to the presence of the diode 28, any of the detection switches 24A to 24C An alarm is activated when one of the two is closed.

Next, with the light switch 25 closed and the headlights 26 on, the ignition switch 22 is opened, and when the driver exits the vehicle and the door switch 27 is closed, the alarm 30 sounds and the driver headlights 26
remains lit to warn you.

At this time, since the resistor 29 is connected in series to the alarm 30, the current flowing through the alarm 30 is reduced to the detection switch 24A.
This is smaller than the alarm current that flows when ~24C is closed, and the sound pressure of the alarm 30 is reduced.

The driver hears this alarm sound, which has a different sound pressure from other alarm sounds, and recognizes that a warning for forgetting to turn off the lights has been issued.

The detection switches 24A to 24C can also be distinguished from each other by changing the alarm sound depending on the sound pressure.

At this time, if a resistor with a different value from the resistor 29 is inserted in series with the detection switch 24A to 24C that needs to distinguish the alarm sound, the activation of this detection switch will be recognized by the alarm sound. Ru.

As described above, according to the vehicle alarm system of the present invention, one common alarm is activated when any one of the plurality of detection switches, two or more of which are not activated at the same time, is activated. As a result, there is no need to provide multiple alarms according to the detection switch as in the past, and this allows for a low-cost and compact configuration. Since a resistor is connected to the detection switch and the current of the alarm is limited, the sound pressure is different from other alarm sounds, and the driver can easily identify the content of the alarm.

In addition, since a single alarm can notify multiple alarm contents, there is no need for indicators depending on the alarm contents, such as indicator lights that respond to each alarm detection switch, and indicator lights that are undesirable for safe driving can be visually recognized. It doesn't require that.

[Brief explanation of the drawing]

1A and 1B are electrical circuit diagrams of a conventional vehicle alarm device and other examples, and FIG. 2 is an electrical circuit diagram of an embodiment of the vehicle alarm device according to the present invention. 22...Ignition switch, 24A~2
4C...Detection switch, 25...Light switch, 26...Light, 27...
・Door switch (detection switch for forgetting to turn off the light), 28
, 31.32...Reverse current blocking diode, 29
...Resistance, 30...Alarm.

Claims (1)

[Scope of utility model registration request] A switch circuit comprising a series circuit of an alarm detection switch and a resistor, and a plurality of similar series circuits having resistors with different resistance values connected in parallel, and an alarm connected to the switch circuit. Features of vehicle warning device.