KR100841931B1 - The horn for automobile with alarm - Google Patents

Abstract

A combination alarm and horn for a vehicle is provided to change a voltage applied to a switching device by adjusting a ratio of resistance values of first and third resistors to second and fourth resistors. A switching device supplies a current to a horn from a power source according to the voltage applied depending upon a horn signal and an alarm signal. A first resistor and a second resistor distribute the voltage of the horn signal, and a third resistor and a fourth resistor distribute the voltage of the alarm signal. The voltage applied to the second resistor and the fourth resistor turns on the switching device. A first diode is interposed between the second resistor and the switching device.

Description

Automotive horn with alarm {THE HORN FOR AUTOMOBILE WITH ALARM}

1 is a driving circuit of a conventional automobile horn, (a) is an electrical connection diagram of a general horn, (b) is an electrical connection diagram of a horn serving as an alarm.

2 is a structural diagram of an embodiment of the present invention, (a) is a vehicle-switch circuit diagram, and (b) is a vehicle + switch circuit diagram.

3 is an exemplary diagram in which an embodiment of the present invention is applied to a vehicle. (A) shows an example in which a-switch is applied to a vehicle, and (B) shows an example in which a + switch is applied to a vehicle.

*** Description of the symbols for the main parts of the drawings ***

ETACS: Electronic Time & Alarm Control System

Horn H: High Horn Horn L: Low Horn

Q1, Q2: Field Effect Transistor (FET)

Q3, Q4: switching transistor

D1, D2, D3, D4, D5, D6: Diode

R1, R2, R3, R4, R5, R6, R7, R8: Resistor

The present invention relates to an electric electric horn for a vehicle that adds a circuit to a general electric electric horn composed of a diaphragm, a body, a coil, an armature, a pole, and the like, and generates an alarm for theft by an applied signal. .

In general, the horn is used so that the horn is generated by the operation of the horn switch provided in the steering wheel of the driver's seat.

As an example, when the horn switch is turned on as shown in Fig. 1, the horn relay is activated to attach a switch contact point of the relay, and the B + power is applied to the horn to generate a horn sound, as shown in Fig. 1 (a). The attached horn (alarm horn) receives alarm signals from other control systems such as ETACS (Electronic Time & Alarm Control System) or BCM (Body Control Module) in case of an alarm situation. Depending on the action, the alarm sounds intermittently.

The connection system of the car horn and the alarm used as described above should use the same type of horn, one (SINGLE HORN) or two (DUAL HORN) for the horn, and attach another horn separately for the alarm. In addition, each relay has a disadvantage of having to be attached, which is a cost increase of the car.

In order to overcome such a cost-related problem, as shown in FIG. 1 (b), the alarm function can be used for the horn horn, but the loud sound of the horn may cause inconvenience and dissatisfaction to the user, resulting in problems in terms of merchandise. There are a number of problems with using a horn as it is.

An object of the present invention is to provide a horn that can be used as an alarm for the alarm to solve the above problems, but also to control the volume of the sound when the alarm is activated.

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an automobile horn which also serves as an alarm that makes a sound based on a horn signal and an alarm signal, the current being supplied from a power supply according to the voltage applied based on the horn signal or the alarm signal. And a switching element for supplying to the horn, a first resistor and a second resistor for distributing the voltage of the horn signal, and a third resistor and a fourth resistor for distributing the voltage of the alarm signal. The voltage applied to the fourth resistor is characterized by conducting the switching element.

In addition, the switching device is a field effect transistor (FET), further comprising a first diode between the second resistor and the switching device, and further comprising a second diode between the fourth resistor and the switching device The sound volume of the horn may be adjusted by controlling a current supplied to the horn by changing a voltage applied to the switching element by adjusting a ratio between a resistance value of the first resistor and a resistance value of the second resistor. The sound volume of the horn may be adjusted by controlling the current supplied to the horn by changing the voltage applied to the switching element by adjusting the ratio of the resistance of the third resistor to the resistance of the fourth resistor.

In addition, the voltage applied to the second resistor and the voltage applied to the fourth resistor are different from each other, and the horn and the switching elements are each plural.

That is, in the present invention, as shown in FIG. 2, the function of the switch circuit is configured to sound the horn without limit when the horn actuation signal is applied, and generate a predetermined sound smaller than the original sound when the alarm actuation signal is applied. The sound volume of the back horn can be adjusted and the horn for the horn can be used at the same time for the alarm such as theft.

(Example)

Hereinafter, the present invention will be described with reference to Examples for achieving the above object.

In the following description, the horn means an operation or a sound that makes a sound by pressing a horn button attached to a steering wheel or the like, and an alarm means that the horn sounds for reasons different from the horn such as theft. Means the operation and sound. In addition, the horn specifically refers to a horn, and generates a horn sound and an alarm sound.

Fig. 2 is a diagram showing a switch circuit according to an embodiment of the present invention, where (a) represents a -switch and (b) represents a + switch.

As shown in the figure, the circuit of this embodiment is a relatively simple circuit composed of a resistor, a diode, and a transistor. Here, the transistor functions as a switching element, and typically uses a field effect transistor (FET).

The case of the + switch in Fig. 2B will be described.

First, the case of a horn is demonstrated.

When a horn signal is applied, that is, pressing a horn button or the like on the steering wheel to activate the horn switch, this signal is divided into voltages proportional to the respective resistance values of the resistors R1 and R2, and the voltage to the resistor R2 is diode D2. Is applied to the transistor Q1 through to turn on the transistor Q1, and power is supplied from the B + to the horn H to sound the horn H.

At the same time, the voltage to the resistor R2 is applied to the transistor Q2 through the diode D1 to conduct the transistor Q2 so that the power from B + is applied to the horn L, and the horn L rings.

In this case, the alarm signal is applied as a pulse signal having an ON / OFF period, so that the horn may emit an intermittent alarm sound.

If the value of the resistor R1 is smaller than that of the resistor R2, most of the voltage of the horn signal is applied to the resistor R2, and a relatively large voltage is applied to the transistors Q1 and Q2 so that the current from the B + can flow to the horns H and L without restriction. Can be. Therefore, you can make a loud horn.

On the other hand, when an alarm signal is applied, that is, when an alarm device or the like detects theft and the like, and the alarm signal is applied, the signal is divided into voltages proportional to the respective resistance values of the resistors R3 and R4, and is applied to the resistor R4. The voltage is applied to the transistor Q1 through the diode D3, the transistor Q1 conducts, and the power is supplied from the B + to the horn H, and the horn H sounds.

At the same time, the voltage to the resistor R4 is applied to the transistor Q2 through the diode D4, the transistor Q2 is conducted so that the power from B + is applied to the horn L, and the horn L rings.

If the value of the resistor R4 is smaller than that of the resistor R3, only a small portion of the voltage of the horn signal is applied to the resistor R4, and a relatively small voltage is applied to the transistors Q1 and Q2 to flow the current from B + to the horns H and L. Can give Thus, a relatively small horn can be produced.

In the above embodiment, specific examples such as resistance values are shown below.

D1 ~ D6: 1N4937

Q1, Q2: IRF640

Q3, Q4: A1015

R1: 1kΩ

R2, R4, R5, R7: 10kΩ

R3: 15kΩ

R6, R8: 220Ω

Therefore, when the horn signal is input, since the resistance value of the resistor R1 is 1 kΩ and the resistance value of the resistor R2 is 10 kΩ, if the battery voltage of the vehicle is 12V, the voltage applied to the resistor R1 is about 1.1V and the voltage applied to the resistor R2 is about 10.9. It becomes V. The voltage applied to the resistor R2 is applied to the transistors Q1 and Q2, and a current proportional thereto flows in the horn to produce a relatively loud sound.

On the other hand, since the resistance value of the resistor R3 is 15 kΩ and the resistance value of the R4 is 10 kΩ when the alarm is activated, assuming that the battery voltage of the vehicle is 12 V, 7.2 V is applied to the resistor R3 according to Ohm's law, and 4.8 is applied to the resistor R4. The voltage of V is applied, and the voltage applied to the resistor R4 is applied as the input voltage of the transistors Q1 and Q2 through the diodes D3 and D4 so that a current proportional to the input voltage of 4.8V flows through the transistors Q1 and Q2 into the horn. . Accordingly, the sound of the horn operated by the alarm is smaller than the sound of the horn operated by the horn.

Thus, by using the transistors Q1 and Q2 as FETs, the resistance value is changed according to the horn or the alarm, and the voltage applied to the transistors Q1 and Q2 is changed to change the current flowing through the transistors Q1 and Q2. You can adjust the sound of the horn.

In this way, the volume of the horn sound can be adjusted by adjusting the resistance values of the resistors R1, R2, R3, and R4.

On the other hand, Fig. 2A relates to the circuit for the-switch, and the circuit on the right from the resistors R1 and R3 is the same as the circuit for the + switch.

When a negative horn signal is applied, current flows from the power supply B + through the resistors R5, R6 and D5. The voltage applied to the resistor R6 by this current conducts the transistor Q3. When transistor Q3 conducts, current flows from power source B + through transistor Q3, resistors R1 and R2. Since the subsequent operation is the same as the case of the + switch of FIG. 2 (b), the description thereof is omitted.

On the other hand, when the alarm signal is applied in Fig. 2A, current flows from the power supply B + through the resistors R7, R8 and diode D6. The current causes a voltage across the resistor R8, which conducts the transistor Q4. When transistor Q4 is turned on, current flows from power source B + through transistor Q4, resistors R3 and R4. This current causes a voltage on the resistor R4. Since the subsequent operation is the same as in the case of Fig. 2 (b) described above, the description thereof will be omitted.

3 (a) and 3 (b) show an embodiment in which the present invention is modularized and applied to the embodiment.

When driving the horn in the manner described above, the large current flowing in the horn flows by the transistors Q1 and Q2, which are semiconductor devices, so that the horn operation relay and the alarm operation relay applied separately are not necessary.

In addition, the control method as described above may be easily applied to a control system of an automobile by adding a circuit of the present invention to an ETACS or other controller, or may be manufactured and applied in a separate module form.

Although the above embodiment has been described in the case of using two horns (horn), the present invention is not limited thereto, but may be applied to the case of using one horn. That is, it can also be implemented using one transistor and one horn as shown in FIG.

One embodiment in this case is shown in FIG. The horn of FIG. 4 differs from the horn of FIG. 2 in that the horn is one and thus the transistor is Q1, and the rest is the same as in FIG. Operation thereof is also the same as in FIG.

In the above embodiment, the loudness of the alarm sound is reduced, but in some cases, the loudness of the alarm sound may be larger than the horn sound. Of course, this can be achieved by adjusting each resistance value.

As described above, the present invention can control the magnetization force by controlling the excitation current of the horn coil by the input voltage applied to the circuit, and control the sound of the horn by controlling the amplitude of the diaphragm according to the changed magnetization force. It is.

Therefore, since the FET can control the drive current of the horn according to the input voltage, separate relays for switching are not required.

In addition, the price is low due to the simple circuit.

In addition, the horn and alarm sound can be adjusted by adjusting the resistance of the circuit, so that the difference between the horn and the alarm sound can be distinguished sensibly. You can reduce the inconvenience.

Claims (8)

In the car horn which functions as an alarm which makes a sound based on a horn signal and an alarm signal, respectively, A switching element for supplying electric current from the power supply to the horn in accordance with the voltage applied based on the horn signal or the alarm signal; A first resistor and a second resistor for distributing the voltage of the horn signal; A third resistor and a fourth resistor for distributing the voltage of the alarm signal. Composed, And a voltage applied to the second resistor and the fourth resistor conducts the switching element. The method of claim 1, The switching device is a car horn, characterized in that the field effect transistor (FET). The method of claim 1, The car horn further comprising a first diode between the second resistor and the switching element. The method of claim 1, The car horn further comprising a second diode between the fourth resistor and the switching element. The method of claim 2, The volume of the horn can be adjusted by controlling the current supplied to the horn by changing the voltage applied to the switching element by adjusting the ratio of the resistance of the first resistor to the resistance of the second resistor. Car horns. The method of claim 2, By changing the voltage applied to the switching element by adjusting the ratio of the resistance value of the third resistor and the resistance value of the fourth resistor to control the current supplied to the horn to control the loudness of the horn. Car horns. The method according to claim 1 or 2, And the voltage applied to the second resistor and the voltage applied to the fourth resistor are different from each other. The method according to claim 1 or 2, The horn and the car horn, characterized in that each of the plurality of switching elements.

Images