JP2021004010A - Horn control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a horn control device capable of easily stopping a theft detection function. When a vehicle is stolen, a horn control device 2 turns on a horn relay 4 provided between a horn 31 and 32 and a battery 10 to sound the horns 31 and 32. The CPU 716 monitors the disconnection or tilt of the vehicle while the ignition or accessory is off and the vehicle door is locked, and detects the theft of the vehicle based on the monitoring. When the CPU 716 detects the theft, it turns on the horn relay 4 and sounds the horns 31 and 32. [Selection diagram] Fig. 1

Description

The present invention relates to a horn control device.

A horn control device that sounds a horn when a vehicle theft is detected by using a horn that is installed as standard equipment in a vehicle has been proposed (Patent Document 1). This horn control device is provided in a relay box, and when theft is detected, the horn relay is turned on to sound the horn. Further, a horn control device provided with a stop switch for stopping the theft detection function (horn sounding function) at an arbitrary timing such as when servicing a vehicle has also been proposed (Patent Document 2).

JP-A-2015-116852 Japanese Unexamined Patent Publication No. 2017-154627

However, the above-mentioned horn control device is provided in the relay box. Therefore, in order to operate the stop switch, it is necessary to open the bonnet and the lid of the relay box to operate the stop switch, which is troublesome.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a horn control device capable of easily stopping the theft detection function.

In order to achieve the above-mentioned object, the horn control device according to the present invention is characterized by the following [1] to [3].
[1]
A horn control device that turns on the switch provided between the horn and the power supply to sound the horn when the vehicle is stolen.
A monitoring means that monitors the vehicle while the ignition or accessory is off and the door of the vehicle is locked, and detects the theft of the vehicle based on the monitoring.
A control means for turning on the switch and sounding the horn when the monitoring means detects the theft.
Must be a horn control device.
[2]
The horn control device according to [1].
Further provided with an inclination detecting means for detecting the inclination of the vehicle,
The monitoring means detects the theft when the inclination of the vehicle is detected by the inclination detecting means.
Must be a horn control device.
[3]
The horn control device according to [1] or [2].
Further provided with a disconnection detection wire arranged along a wire harness that electrically connects the switch and the horn.
When the monitoring means detects a disconnection of the disconnection detecting electric wire, the monitoring means detects the theft.
Must be a horn control device.

According to the horn control device having the above configurations [1] to [3], the monitoring means monitors the vehicle while the ignition or accessory is off and the vehicle door is locked, and the vehicle is based on the monitoring. Detect theft. As a result, the theft detection function can be stopped simply by unlocking the door lock of the vehicle.

According to the present invention, it is possible to easily provide a horn control device capable of stopping the theft detection function.

The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through the embodiments for carrying out the invention described below (hereinafter, referred to as "embodiments") with reference to the accompanying drawings. ..

FIG. 1 is a diagram for explaining a schematic configuration of the horn control device of the present invention. FIG. 2 is an external perspective view of the control device main body shown in FIG. FIG. 3 is a flowchart showing a processing procedure of the CPU of the horn control device shown in FIG.

Specific embodiments of the present invention will be described below with reference to the respective figures.

As shown in FIG. 1, the horn control device 2 in the present embodiment is provided in a vehicle having the horn device 1. The horn device 1 includes a treble range horn 31, a low range horn 32, a horn relay (switch) 4, and a horn harness (wire harness) 5. The horns 31 and 32 output a horn sound. The horn relay 4 is attached to a relay box 8 described later. The contacts of the horn relay 4 are opened / closed (on / off) by the horn button 9 provided on the steering wheel in the vehicle interior. The horn relay 4 is provided between the battery 10 and the horns 31 and 32, which are power sources mounted on the vehicle, and turns on / off the supply of the driving power from the battery 10 to the horns 31 and 32.

This embodiment will be described by taking as an example a case of so-called body ground in which the negative terminal of the battery 10, that is, the ground (GND) is connected to the vehicle body. The vehicle is equipped with a relay box 8 that accommodates a plurality of relays. The relay box 8 supplies power to various vehicle control devices (for example, brake control device, engine control device, shift control device, etc.) and electrical components (lamps such as headlights, horns, accessories, etc.) provided in the vehicle. A fuse is housed in the relay, these control devices, or electrical components that supply the current, so that no more than a predetermined current flows. The relays and fuses are connected by forming a desired circuit by bus bars and wiring arranged in the relay box 8.

A power harness 11 connected to the positive terminal of the battery 10 is connected to the relay box 8. The above-mentioned horn relay 4 is incorporated in the relay box 8. In the horn relay 4, the power harness 11 of the battery 10 is connected to the power supply side of the contact via the horn fuse 12. In the horn relay 4, the horn harness 5 is connected to the load side of the contact.

The horn harness 5 has a main harness 51, a branch portion 52, and a branch harness 53. The base end of the main harness 51 is connected to the horn relay 4, and the tip is connected to, for example, a treble horn 31 that outputs a horn sound (blowing sound) on the treble side. In the treble horn 31, the positive terminal is connected to the main harness 51, and the negative terminal is body grounded. The main harness 51 is provided with a branch portion 52. A bass horn 32 that outputs, for example, a horn sound (blowing sound) on the bass side is connected to the branch portion 52 by a branch harness 53. In the bass horn 32, the positive terminal is connected to the branch harness 53, and the negative terminal is body grounded.

In the horn relay 4, a power supply is connected to the power feeding side of the coil, and a switch harness 13 from the horn button 9 is connected to the ground side of the coil. The horn button 9 opens and closes between the coil of the horn relay 4 and the body ground. Therefore, when the horn button 9 is turned on, the coil of the horn relay 4 is excited, the contacts of the horn relay 4 are closed, drive power is supplied to both the treble horn 31 and the bass horn 32, and the treble and the horn are A low-pitched horn is output.

The horn button 9 is provided in the vehicle interior. The relay box 8 is generally provided near the passenger compartment of the engine room. The switch harness 13 is arranged between the horn button 9 and the relay box 8 so as to penetrate the vehicle interior and the engine compartment. On the other hand, the treble range horn 31 and the bass range horn 32 are provided on the front portion 14 of the vehicle body such as the back side of the bumper in a general passenger car. The horn harness 5 connects the relay box 8 to these high-frequency horns 31 and low-frequency horns 32. The main harness 51 of the horn harness 5 is arranged from the engine room toward the front portion 14 of the vehicle body, and is connected to, for example, the treble range horn 31. The branch portion 52 of the main harness 51 is usually located at the front portion 14 of the vehicle body such as the back side of the bumper, and the branch harness 53 is connected to the branch portion 52. The branch harness 53 is arranged in the vehicle width direction and is connected to the treble range horn 31 and the bass range horn 32 arranged on the opposite side in the vehicle width direction. Therefore, a part of the main harness 51 and the branch harness 53, which are derived from the engine room and distributed at the front portion 14 of the vehicle body, are more vulnerable to the threat of cutting than the horn harness 5 in the engine room.

Therefore, when the horn control device 2 according to the present embodiment detects the disconnection of the horn harness 5, the theft is detected and the horns 31 and 32 are sounded, so that the effect of suppressing the theft of the automobile can be easily enhanced. It is done so that it can be done.

As shown in FIG. 1, the horn control device 2 includes an electric wire 6 for detecting disconnection and a control device main body 7. The horn harness 5 allocated from the relay box 8 to the high frequency range horn 31 and the low frequency range horn 32 is also arranged from the relay box 8 along with the disconnection detection electric wire 6. The disconnection detection electric wire 6 is connected to the disconnection detection tab terminal T1 of the control device main body 7, which will be described later, at its base end in the relay box 8. The tip of the disconnection detection electric wire 6 whose base end is connected to the disconnection detection tab terminal T1 is connected to the ground side terminal of the bass horn 32 on the distance side from the relay box 8. When the horn harness 5 is cut, the disconnection detection electric wire 6 is integrally attached to the horn harness 5 and arranged so that the horn harness 5 is cut at the same time. The disconnection detection electric wire 6 may be vertically attached in parallel with the horn harness 5, or may be wound around the outer circumference of the horn harness 5 and attached. Further, the horn harness 5 and the disconnection detection electric wire 6 may be a coaxial cable. In this way, the horn control device 2 is configured so that the disconnection detection electric wire 6 arranged along the horn harness 5 can be used as the disconnection detection sensor.

The control device main body 7 has a security circuit 71 and a case 72 (FIG. 2) for accommodating the security circuit 71. The security circuit 71 includes a voltage adjusting unit 711, a drive circuit 712, a disconnection detection circuit 713, a pull-up circuit 714, a tilt detection circuit 715 as a tilt detection means, a control means, and a central processing unit as a monitoring means. It has (hereinafter, CPU) 716. The voltage adjusting unit 711 is connected to the power tab terminal T2 connected to the battery 10 via the horn fuse 12. The voltage adjusting unit 711 transforms the power supply from the battery 10 into 12V and 5V. For example, the voltage adjusting unit 711 supplies 5V to the CPU 716 described later and 12V to the pull-up circuit 714 described later.

The drive circuit 712 excites the coil of the horn relay 4 by receiving a drive signal from the CPU 716, turns on the contacts, and enables the output of the horn sound of the treble horn 31 and the horn 32. The disconnection detection tab terminal T1 is connected to the disconnection detection circuit 713. The disconnection detection circuit 713 inputs a disconnection detection signal to the CPU 716 when the disconnection of the disconnection detection electric wire 6 is detected. When the disconnection detection electric wire 6 is disconnected, the pull-up circuit 714 inputs a pull-up signal to the CPU 716. Therefore, the pull-up circuit 714 can detect the disconnection of the disconnection detection electric wire 6 in the same manner as the disconnection detection circuit 713. By arranging the disconnection detection circuit 713 and the pull-up circuit 714 side by side in this way, it is possible to prevent malfunction and malfunction of disconnection detection.

The tilt detection circuit 715 includes, for example, an acceleration sensor. The accelerometer outputs a tilt signal when the vehicle tilts due to "theft of tires and wheels, theft of tow trucks". The tilt signal is input to the CPU 716.

A grounding tab terminal T3 is connected to the CPU 716, and the body is grounded. Further, the ignition tab terminal T4 and the door lock tab terminal T5 are connected to the CPU 716 via the inputs I / F 717 and 718. The wiring routed from the ignition switch (not shown) is connected to the ignition tab terminal T4. Wiring routed from the door lock mechanism (not shown) is connected to the door lock tab terminal T5. As a result, the ignition signal output when the ignition switch is turned on is input to the CPU 716. The CPU 716 determines whether or not the ignition is turned off based on the ignition signal.

Further, a door lock relay signal output during door lock is input to the CPU 716. The CPU 716 determines whether or not the door is locked based on the door lock relay signal. Then, the CPU 716 monitors the disconnection detection signal, the pull-up signal, and the inclination signal to detect the theft of the vehicle while it is determined that the ignition is off and the door of the vehicle is locked. When the CPU 716 detects that the vehicle has been stolen, it outputs a drive signal, turns on the horn relay 4, and sounds the horns 31 and 32. Further, the CPU 716 does not sound the horns 31 and 32 unless it is determined that the ignition is off and the vehicle door lock is locked.

As shown in FIG. 2, the case 72 is composed of a lower case 721 with a terminal that can be attached to the relay box 8 and an upper case 722. A plurality of (five in this configuration example) tab terminals T are vertically provided on the lower surface of the lower case 721 with terminals. Each tab terminal T is connected to a socket terminal (not shown) of a relay fitting port provided in the relay box 8 and is connected to a predetermined circuit of the relay box 8. The plurality of tab terminals T are composed of the disconnection detection tab terminal T1, the power supply tab terminal T2, the grounding tab terminal T3, the ignition tab terminal T4, and the door lock tab terminal T5.

A main board (not shown) is fixed to the lower case 721 with terminals. The security circuit 71 described above is mounted on the main board, and is covered with an upper case 722 mounted on the lower case 721 with terminals.

In the control device main body 7, the external dimensions of the upper case 722 attached to the lower case 721 with terminals conform to, for example, the size of an international standard ISO microrelay. As a result, the control device main body 7 can be attached to the relay fitting port in the relay box 8 after improving versatility, and can be attached and detached. As a result, the control device main body 7 has realized a configuration in which the space in the relay box 8 can be effectively used to reduce the man-hours for assembling the horn control device 2 and reduce the cost due to the improvement in maintainability. Further, by attaching the control device main body 7 to the relay box 8, the ignition signal and the door lock signal can be easily taken out. The external dimensions of the control device main body 7 are not limited to micro relays, and can be adapted to the sizes of various in-vehicle relays.

Next, the operation of the horn control device 2 having the above configuration will be described with reference to the flowchart of FIG. First, the CPU 716 of the horn control device 2 determines whether or not the ignition is off and the vehicle door is locked based on the ignition signal and the door lock relay signal (step S1). If the ignition is off and the vehicle door is not locked (Y in step S1), the CPU 716 returns to step S1 again.

On the other hand, if the ignition is off and the vehicle door is locked (Y in step S1), the CPU 716 monitors the disconnection detection signal and the pull-up signal, and whether or not the disconnection detection wire 6 is disconnected. (Step S2). When either the disconnection detection signal or the pull-up signal is input, the CPU 716 determines that the disconnection detection wire 6 is cut and theft has occurred (Y in step S2), and sends a drive signal to the drive circuit 712. Output (step S3) and end the process. The drive circuit 712 to which the drive signal is input excites the coil of the horn relay 4 to output a horn sound from the treble range horn 31 or the low range horn 32.

At this time, when the branch portion 52 and the treble range horn 31 are cut together with the disconnection detection wire 6 in the main harness 51, the driving power is supplied to the low range horn 32 and the horn sound is output. .. Further, when the branch harness 53 is cut together with the disconnection detection electric wire 6, the driving power is supplied to the treble range horn 31 and the horn sound is output.

On the other hand, if neither the disconnection detection signal nor the pull-up signal is input, the CPU 716 determines that the disconnection detection wire 6 is not disconnected (N in step S2), monitors the inclination signal, and the vehicle moves. It is determined whether or not the vehicle is tilted (step S4). When the tilt signal is input, the CPU 716 determines that the vehicle is tilted and the tire, wheel, or wrecker is stolen (Y in step S4), and proceeds to step S3. Further, the CPU 716 determines that the vehicle is not tilted (Y in step S2) if there is no input of the tilt signal, and returns to step S1.

According to the above-described embodiment, the CPU 716 monitors the vehicle while the ignition is off and the vehicle door is locked, and detects the theft of the vehicle based on the monitoring. As a result, the theft detection function can be stopped simply by unlocking the door lock of the vehicle. Therefore, if maintenance is performed with the door lock of the vehicle released, the horns 31 and 32 will not sound even if the vehicle is jacked up and tilted during maintenance.

The present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, and the like. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

Further, according to the above-described embodiment, the CPU 716 is monitored while the ignition signal is input, the ignition is off, and the vehicle door is locked, but the present invention is not limited to this. Absent. An accessory signal may be input to the CPU 716 to monitor the vehicle while the accessory is off and the vehicle door is locked.

According to the above-described embodiment, the CPU 716 determines whether or not the door is locked based on the door lock relay signal from the door lock mechanism, but the present invention is not limited to this. It suffices if it can be determined whether or not the door is locked. For example, in a vehicle that can be locked with a keyless key, it is determined whether or not the door is locked based on the lock signal and unlock signal transmitted from the keyless key. You may do so. Further, in a vehicle that can be locked with a smart key, a signal from the smart key and a locking / unlocking operation such as bringing a hand close to the doorknob may be detected to determine whether or not the door is locked. ..

Here, the features of the above-described embodiments of the horn control device according to the present invention are briefly summarized and listed below in [1] to [3], respectively.
[1]
A horn control device (2) that turns on a switch (4) provided between a horn (31, 32) and a power supply (10) to sound the horn (31, 32) when the vehicle is stolen.
A monitoring means (716) that monitors the vehicle while the ignition or accessory is off and the door of the vehicle is locked, and detects the theft of the vehicle based on the monitoring.
A control means (716) for turning on the switch (4) to sound the horn when the monitoring means (716) detects the theft is provided.
Horn control device (2).
[2]
The horn control device (2) according to [1].
Further provided with an inclination detecting means (715) for detecting the inclination of the vehicle,
The monitoring means detects the theft when the inclination of the vehicle is detected by the inclination detecting means (715).
Horn control device (2).
[3]
The horn control device (2) according to [1] or [2].
A wire for detecting disconnection (6) arranged along a wire harness (5) that electrically connects the switch (4) and the horn (31, 32) is further provided.
When the monitoring means (716) detects the disconnection of the disconnection detecting electric wire (6), the monitoring means (716) detects the theft.
Horn control device (2).

2 Horn control device 4 Horn relay (switch)
5 Horn harness (wire harness)
6 Wire for disconnection detection 10 Battery 31 High frequency horn (horn)
32 Bass horn (horn)
715 Tilt detection circuit (tilt detection means)
716 CPU (monitoring means, control means)

Claims (3)

A horn control device that turns on the switch provided between the horn and the power supply to sound the horn when the vehicle is stolen.
A monitoring means that monitors the vehicle while the ignition or accessory is off and the door of the vehicle is locked, and detects the theft of the vehicle based on the monitoring.
A control means for turning on the switch and sounding the horn when the monitoring means detects the theft.
Horn control device. The horn control device according to claim 1.
Further provided with an inclination detecting means for detecting the inclination of the vehicle,
The monitoring means detects the theft when the inclination of the vehicle is detected by the inclination detecting means.
Horn control device. The horn control device according to claim 1 or 2.
A wire for detecting disconnection, which is arranged along a wire harness that electrically connects the switch and the horn, is further provided.
When the monitoring means detects a disconnection of the disconnection detecting electric wire, the monitoring means detects the theft.
Horn control device.

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