JP4042703B2 - Automotive buzzer controller - Google Patents

Description

  The present invention relates to a vehicle-mounted electromagnetic buzzer control device that controls ringing of an electromagnetic buzzer mounted on a vehicle such as an automobile, a motorcycle, or a moped bicycle.

As a security device for preventing theft of a motorcycle or the like, a device that sounds a buzzer when detecting the inclination of the body of a motorcycle (vehicle) has been conventionally provided (for example, Patent Document 1).
Japanese Patent Laying-Open No. 2003-212095 (see paragraph numbers <0014> and <0021>)

  By the way, automobiles, motorcycles, and moped bicycles are equipped with an electromagnetic buzzer that is used to check safety during driving. When the driver turns on the horn switch, the electromagnetic buzzer is directly connected to the on-vehicle power supply (battery). When a voltage is applied, it rings and emits a sound unique to an electromagnetic buzzer.

  Since this ringing sound has a constant timbre due to the vibration frequency unique to the sound source of the electromagnetic buzzer, it cannot be identified by the timbre when the buzzer of the security device as described above is also used.

  Therefore, the security device does not use a safety confirmation electromagnetic buzzer for alarms, but has a security device unique buzzer.

  The present invention has been made in view of the above points, and the purpose of the present invention is to make the sound of an electromagnetic buzzer used for safety confirmation different from the sound of safety confirmation to give distinctiveness. Another object of the present invention is to provide a vehicle-mounted electromagnetic buzzer control device.

In order to achieve the above object, according to the first aspect of the present invention, there is provided an in- vehicle electromagnetic buzzer control device for controlling driving of an electromagnetic buzzer by a driving power source comprising an in- vehicle battery , which is connected to one end of the driving power source. A first power source input terminal, a second power source input terminal connected to the other end of the driving power source via one switching contact of the selector switch, and a driving power source via the other switching contact of the selector switch A third power input terminal connected to the other end of the power source, a drive circuit for driving the electromagnetic buzzer, a first state for connecting the electromagnetic buzzer to the drive circuit, and a third power input by separating the electromagnetic buzzer from the drive circuit. A switching circuit for switching between the second state connected to both ends of the driving power supply via the terminal and the on / off switch, and the on / off switch was turned on in the second state to apply the voltage of the driving power supply to the electromagnetic buzzer Sound of time And a control circuit that controls the drive circuit in the first state so as to produce a ringing sound different from the sound. The switching circuit has a common terminal connected to one end of the electromagnetic buzzer and a normally closed contact at one end of the drive circuit. A first relay comprising a first relay contact connected and a normally open contact connected to a third power input terminal; a first excitation coil connected between the first and third power input terminals; A second relay contact having a common terminal connected to the other end of the electromagnetic buzzer, a normally closed contact connected to the other end of the drive circuit, and a normally open contact connected to the drive power supply via an on / off switch; And a second relay composed of a second exciting coil connected between the first and third power input terminals .

According to the first aspect of the invention, when the changeover switch is operated to switch the switching contact, the excitation of the first and second excitation coils is turned on and off, and the first and second excitation coils are excited. Is in the second state when both the first and second relay contacts are switched to the normally open contact side, and when the first and second exciting coils are not excited, the first and second relay contacts Are switched to the normally closed contact side to enter the first state. In the first state, the control circuit controls the drive circuit to generate a ringing sound different from the ringing sound of the electromagnetic buzzer in the second state. It can be made to sound and can be given distinctiveness. For example, it can be used for notifications other than for safety confirmation.

According to a second aspect of the present invention, in the first aspect of the present invention, the control circuit performs PWM control on the voltage of the driving power supply, and applies the PWM-controlled voltage to the electromagnetic buzzer.

According to the invention of claim 2, by controlling the drive voltage of the electromagnetic buzzer, the sound pressure level of the sound of the electromagnetic buzzer can be controlled. As a result, the sound of the second state and the sound of distinctive sound can be obtained. By using a voltage signal that is PWM-controlled as a drive voltage, the current flowing through the electromagnetic buzzer becomes intermittent, and as a result, power consumption can be suppressed.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the vehicle is provided with a tilt sensor that detects a certain tilt of the vehicle, and the control circuit controls the sounding of the electromagnetic buzzer according to a detection signal of the tilt sensor. It is characterized by starting.

  According to the invention of claim 3, since the electromagnetic buzzer can be sounded in conjunction with the detection of the vehicle inclination, the electromagnetic buzzer for safety confirmation is used as an alarm device for a vehicle theft alarm device such as a motorcycle or a moped bicycle. Can also be used.

In the present invention, every time the changeover switch is operated to switch the switching contact, the excitation of the first and second excitation coils is turned on and off, and the first and second excitation coils are excited when the first and second excitation coils are excited. The second relay contact is switched to the normally open contact side to enter the second state. When the first and second exciting coils are not excited, both the first and second relay contacts are normally closed. By switching to the contact side, the first state is entered, and in the first state, the control circuit controls the drive circuit so that it can be generated as a sound different from the sound of the electromagnetic buzzer in the second state. Thus, there is an effect that it can be used for notification of purposes other than safety confirmation, for example.

Embodiments of the present invention will be described below.
(Embodiment 1)
FIG. 1 shows a specific circuit of this embodiment of an in-vehicle electromagnetic buzzer control device 2 mounted on a moped bicycle (or motorcycle) 1 as shown in FIG.

The on-vehicle electromagnetic buzzer control device 2 of the present embodiment includes an electromagnetic buzzer 3 mounted for safety confirmation as shown in FIG. 1, a driving power source (hereinafter referred to as a power source) 4 using a vehicle-mounted battery, and switching. a switch serving the main switch SW1, consists unit substrate 10 for the external by a connector connecting the on-off switch serving horn switch SW2, the unit substrate 10, the voltage of the power supply 4 and the PWM control through the drive circuit serving drive circuit 5 , tilt sensor the PWM control voltage to the control circuit 6 comprising a microcomputer for controlling the sounding of the electromagnetic buzzer 3 by causing applied as a drive voltage to the electromagnetic buzzer 3, to start the control operation of the control circuit 6 by the detection signal 7 and the voltage of the power source 4 is converted into a predetermined voltage and supplied to the control circuit 6 and the inclination sensor 7 as an operating voltage. A power supply circuit 8, current path and either (a first state) through the drive circuit 5 as a current path of the electromagnetic buzzer 3, or a current path for connecting the power source 4 directly to the electromagnetic buzzer 3 (second state) Are switched according to the operating position of the main switch SW1, the drive circuit 5 and a capacitor C3 connected in parallel to the electromagnetic horn 3.

Here, the power supply circuit 8 is connected in parallel to the surge absorption element S via a surge absorption element S connected between the first power supply input terminal I2 and the second power supply input terminal I1, and a reverse current prevention diode D1. The capacitor C1, a three-terminal regulator U that stabilizes the voltage across the capacitor C1 to a constant voltage, and a capacitor C2 that is connected in parallel to the output terminal side of the three-terminal regulator U. The tilt sensor 7 and the control circuit 6 are supplied as operating power.

  The tilt sensor 7 is configured to output a detection output to an input port of the control circuit 6 when the vehicle is tilted by a certain angle or more, and includes, for example, an acceleration sensor.

  The control circuit 6 operates using the voltage from the power supply circuit 8 as an operating voltage. When a detection signal is input from the inclination sensor 7, the control circuit A / D converts the power supply voltage and has a duty ratio corresponding to the voltage, for example, a frequency of 10 kHz. In this embodiment, the duty ratio is set to be constant by the output voltage of the three-terminal regulator U.

Of course, the duty ratio can be variously set by dividing the output voltage of the three-terminal regulator U by resistance and taking the voltage as a voltage for determining the duty ratio .

The drive circuit 5 has an NPN transistor Q1 connected in parallel to the capacitor C1 via the resistors R1 and R2 between the collector and the emitter, and a PWM signal from the control circuit 6 is input to the base via the resistor R3. base connected to a connection point of the resistors R1, R2, and transistor Q2 of PNP type the emitter-collector capacitor C1 is connected in parallel via the resistor R4, R5, base to the connection point of the resistors R4, R5 is It is connected, connected between the collector and the emitter in parallel with the capacitor C1 via the series circuit of the NC side of the relay contact r2 of NC side and electromagnetic buzzer 3 and relay Ry2 relay contact r1 of the relay Ry1 of the switching circuit 9 to be described later an NPN-type transistor Q3 which is, the relay contact of the NC side and electromagnetic buzzer 3 and relay Ry2 relay contact r1 of the relay Ry1 composed of counter electromotive force absorbing diode D2 Metropolitan connected in parallel to the series circuit of the NC side of r2.

The switching circuit 9 includes a first DC relay Ry1 and a second relay Ry2,
Excitation coils CL1.. Of the first relay Ry1 (hereinafter abbreviated as relay Ry1) and the second relay Ry2 (hereinafter abbreviated as relay Ry2) . CL2 is connected in parallel and this parallel circuit is connected to the power source 4 via the switching contact b side of the main switch SW1, that is, the unlocking side, via the third power input terminal I3, and the common terminal of the relay contact r1 is electromagnetically connected. Connected to one end of the buzzer 3, the NO side is connected to the switching contact b of the main switch SW1 via the third power input terminal I3 , the NC side is connected to the cathode of the diode D1, and the common terminal of the relay contact r2 is electromagnetic Connected to the other end of the buzzer 3, the NO side is connected to the ground (minus pole) of the power source 2 and the NC side is connected to the collector of the transistor Q3 via the horn switch SW2.

The main switch SW1 can be switched to a switching contact a on the locking side, a neutral contact c, and a switching contact b on the unlocking side. When traveling, the main switch SW1 is on the unlocking side ( switching contact b) side. The switching contact a) is inserted.

  Next, the operation of this embodiment will be described.

First position of solution the main switch SW1 is from the neutral contact c side shown in FIG. 1 Tablets state (running state), that is when it is introduced to the switching contact b, the switch circuit 9 of the in-vehicle power supply buzzer controller 2 from a power source 4 An energizing path through which an exciting current flows is formed in the exciting coils CL1 and CL2 of the two relays Ry1 and Ry2 constituting the relays, and the relays Ry1 and Ry2 switch the relay contacts r1 and r2 from the NC side to the NO side. By this switching, an energization path of the power source 4 → the relay contact r1 → the electromagnetic buzzer 3 → the relay contact r2 → the horn switch SW2 → the power source 4 is formed (second state) .

When the horn switch SW2 is turned on in this second state, the voltage of the power supply 4 is continuously applied to the electromagnetic buzzer 3, and a ringing sound is emitted at a predetermined sound pressure level determined by the power supply voltage. That is, a sound for confirming safety is emitted.

  In this unlocked state, since the power supply 4 is not connected to the power supply circuit 8, the power consumption of the electromagnetic buzzer control device 2 is only the power consumption for exciting the relays Ry1 and Ry2.

Next, when the main switch SW1 is turned on to the switching contact a side in order to set a warning state for theft prevention by parking or the like, the exciting currents of the exciting coils CL1 and CL2 of the relays Ry1 and Ry2 are cut off. The relay contacts r1 and r2 return to the NC side (first state) . On the other hand, since the power supply 4 is connected to the power supply circuit 8, operation power is supplied from the three-terminal regulator U to the inclination sensor 7 and the control circuit 6, and the operation standby state is entered.

When the vehicle body (vehicle) is tilted more than a certain level and a detection signal is output from the tilt sensor 7, the control circuit 6 is activated and applies a PWM signal composed of a square wave voltage with a predetermined duty ratio to the base of the transistor Q1 of the drive circuit 5. Output. As a result, the transistor Q1 repeats the operation of turning on and off in the "H" period of the PWM signal, the transistor Q2 is repeatedly turned on and off in synchronization with the on / off of the transistor Q1, and the transistor Q3 is also turned on by the transistor Q2. ON / OFF is repeated in synchronization with ON / OFF. As a result, the voltage of the power source 4 applied to the electromagnetic buzzer 3 in the path of the NC side of the contact r1 of the relay Ry1 → the electromagnetic buzzer 3 → the NC side of the relay contact r2 of the relay Ry2 → the transistor Q3 is PWM-controlled, and the electromagnetic buzzer 3 The applied drive voltage becomes an average voltage determined by the duty ratio, and as a result, the sound pressure level becomes smaller than that at the time of safety confirmation. In other words, the ringing sound is distinct from the ringing sound at the time of safety confirmation, and as a result, the user recognizes it as an alarm sound and can immediately take measures to prevent theft.

  In this embodiment, since the PWM-controlled voltage is applied to the electromagnetic buzzer 3, the current flowing through the electromagnetic buzzer 3 becomes intermittent, and the power consumption of the electromagnetic buzzer 3 is compared to the case of driving by applying a continuous voltage. Less.

  In the state where the main switch SW1 is turned on to the neutral position, the power consumption is reduced because the power supply 4 does not supply the exciting currents of the relays Ry1 and Ry2 and the power supply circuit 8.

  In the present embodiment, the case where the motorcycle is mounted on a motorcycle such as a moped and motorcycle is described, but the present invention may be applied to a four-wheeled vehicle (automobile).

1 is a circuit diagram of Embodiment 1. FIG. It is explanatory drawing of a vehicle mounting state same as the above.

Explanation of symbols

2 Electromagnetic buzzer control device 3 Electromagnetic buzzer 4 Power supply 5 Drive circuit 6 Control circuit 7 Tilt sensor 8 Power supply circuit 9 Switching circuit 10 Unit board Ry1, Ry2 Relay r1, r2 Relay contact CL1, CL2 Excitation coil SW1 Main switch SW2 Horn switch Q1 Q3 Transistors C1-C3 Capacitor U 3-terminal regulator S Surge absorbing element D1, D2 Diode R1-R5 Resistance

Claims (3)

An in-vehicle electromagnetic buzzer control device that controls driving of an electromagnetic buzzer by a driving power source composed of an in-vehicle battery ,
A first power input terminal connected to one end of the drive power supply, a second power input terminal connected to the other end of the drive power supply via one switching contact of the changeover switch, and the other of the changeover switch A third power input terminal connected to the other end of the drive power supply via the switching contact, a drive circuit for driving the electromagnetic buzzer, a first state for connecting the electromagnetic buzzer to the drive circuit, and a drive circuit for the electromagnetic buzzer A switching circuit for switching between a second state connected to both ends of the driving power supply via a third power input terminal and an on / off switch, and an electromagnetic buzzer by turning on / off switch in the second state A control circuit for controlling the drive circuit in the first state so that the ringing sound is different from the ringing sound when the voltage of the driving power supply is applied,
The switching circuit includes a first relay contact having a common terminal connected to one end of the electromagnetic buzzer, a normally closed contact connected to one end of the drive circuit, and a normally open contact connected to a third power input terminal, And a first relay composed of a first exciting coil connected between the third power input terminal, a common terminal is connected to the other end of the electromagnetic buzzer, and a normally closed contact is connected to the other end of the drive circuit. And a second relay consisting of a second relay contact whose normally open contact is connected to the drive power supply via an on / off switch, and a second excitation coil connected between the first and third power input terminals; automotive electromagnetic buzzer control apparatus characterized by having a. 2. The vehicle-mounted electromagnetic buzzer control device according to claim 1, wherein the control circuit performs PWM control on the voltage of the driving power supply and applies the PWM-controlled voltage to the electromagnetic buzzer. 3. The vehicle-mounted vehicle according to claim 1, further comprising a tilt sensor that detects a tilt of the vehicle above a certain level, wherein the control circuit starts ringing control of the electromagnetic buzzer based on a detection signal of the tilt sensor. Electromagnetic buzzer control device.

Images