JPH0688517B2 - Flashing device for vehicle - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a vehicle blinking device used for a turn signal indicator of an automobile.

(Prior art and its problems) In an automatic direction indicator, when the driver turns on the direction indicating switch, a relay intermittent drive control circuit having an oscillation function drives to control the energization of the direction indicator lamp. The relay is controlled so that the direction indicator light blinks at a constant cycle.

The driver can hear the operation sound of the contact mechanism of the relay as a blinking sound of the turn signal lamp. However, in a vehicle with an open structure such as a two-wheeled vehicle, the operation sound is disturbed by noise during traveling. It becomes difficult to hear clearly.

For this reason, it has been proposed to arrange a sounding body in parallel with the above-mentioned relays and control circuits to increase the blinking volume, but this increases the number of parts, increases the cost, and increases the size of the sounding body. There is a limit to being installed in.

(Object of the Invention) The present invention has been made in order to solve the problems of the above-described conventional ones, and has a simple structure without providing a sounding body to increase the flashing operation volume and make it easier to hear. Is intended to provide.

(Structure and Effect of the Invention) A vehicle flashing device of the present invention is a relay having a normally open, normally closed, and common contact, and a relay coil that excites a relay coil of the relay at a constant cycle by turning on a load connection switch. An intermittent drive control circuit is provided, the normally open contact of the relay is connected to the power supply terminal, the common contact is connected to the load terminal, and the other end of the relay coil whose one end is connected to the power supply terminal is the normally closed contact. Connected to.

According to the configuration of this invention, the relay is intermittently turned ON / OFF by turning on the load connection switch, and the load blinking circuit is driven to light in the ON cycle, and in the OFF cycle, the common contact is normally closed. The make-break is repeated, and electromagnetic noise is generated by this, so that the blinking of the load blinking circuit can be heard as a comparatively loud sound, and it is not necessary to prepare a special sounding body, which simplifies the configuration. As a result, the manufacturing cost can be reduced.

(Description of Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a circuit configuration diagram showing an example of a vehicle blinking device according to the present invention.

In the figure, 1 is a power supply, 2 is a power supply switch serially connected to the power supply 1, for example, an ignition switch, 8 is a blinking control circuit, and a power supply terminal 4 connected to the power supply 1 via the switch 2 and a load. It has a terminal 5 and further a ground terminal 6. 7 is a blinking load circuit for indicating a direction, which includes a lamp 8 for indicating a right direction, a lamp 9 for indicating a left direction, a monitor lamp 10 and the like, and a switch for connecting a load, for example, a direction indicating switch 11 Connected to the load terminal 5.

Reference numeral 12 is a relay having a normally open contact NO, a normally closed contact NC and a common contact COM. The normally open contact NO is connected to a power supply terminal 4 via a resistor 13, and one end of a relay coil RC is also connected to the power supply terminal. 4 is electrically connected. Reference numeral 14 denotes a relay intermittent drive control circuit that oscillates at a fixed cycle and drives the relay at this oscillating cycle.For example, it is composed of a pulse oscillating circuit (not shown) and a switching transistor. To the power supply terminal via
The output terminal is connected to the load terminal 5.

The other end of the relay coil RC of the relay 12 is connected to the normally closed contact NC via the diode 15, and the common contact COM is electrically connected to the load terminal 5.

FIG. 2 is a partially cutaway front view of the above device. In the figure, reference numeral 16 is a casing of the device, and a case 17 of the relay 12 is provided inside.
A wiring board 19 having the circuit component 18 mounted therein is housed. A part 17a of the relay case 17 is brought into contact with the inner surface of the side wall 16a of the housing 16.

Next, the operation of the above configuration will be described with reference to the time chart of FIG.

When the ignition switch 2 is turned on, a voltage is applied from the power source 1 to the relay intermittent drive control circuit 14 and the like. When the directional switch 11 is set to the position indicated by the dotted line or the alternate long and short dash line (FIG. 3 (A)), the relay intermittent drive control circuit 14 starts oscillating at a constant cycle, and the relay coil RC is turned on at the above cycle. Repeat OFF.

During the ON cycle of relay 12, the common contact CO of relay 12
M contacts the normally open contact NO, and the power supply current is the above power supply terminal 4,
After passing through the normally closed contact NO, the common contact COM, the load terminal 5 and the direction switch 11, the flashing load circuit 7 flows and the lamp 8 or 9 is turned on (FIG. 3 (B)).

During the OFF cycle of the relay 12, the common contact COM returns to the normally closed contact NC side. Therefore, the power supply terminal 4, the relay coil RC, the diode 15, the normally closed contact NC, the common contact COM,
The relay drive circuit that reaches the blinking load circuit 7 via the load terminal 5 and the directional switch 11 is closed. This allows
The common contact COM separates from the normally closed contact NC, but the relay drive circuit is opened at the same time as it separates, so the common contact COM
Contacts the normally open contact NO (direction indicator lamp 8 or 9
Is lit), the common contact COM returns to the normally closed contact NC side, and this operation is repeated until the NO cycle is reached (FIG. 3 (C)). In this way, relay 12
Direction indicator lamp 8 or 9 lights during the ON cycle,
During the OFF cycle, the repeated operation of the common contact COM is emitted as a buzzer sound (electromagnetic sound) (Fig. 3 (D)).
Therefore, the blinking operation sound of the direction instruction can be heard at a high volume.

The resistance value of the direction indicator lamp 8 (9) when it is not lit is small and does not hinder the driving of the relay 12, and the resistance of the relay coil RC is higher than the internal resistance value of the direction indicator lamp 8 (9). Since the value is large, the lamp 8 (9) does not light when the buzzer sound is generated during the OFF cycle.

By the way, although the buzzer sound may be emitted to the outside as it is, if a part 17a of the relay case 17 is in contact with the inner surface of the one side wall 16a of the housing 16 as in this example, the buzzer sound is generated. The sound is transmitted to the side wall 16a and becomes louder.
Of course, instead of the relay case 17, the fixed contact piece 40 on the normally closed contact NC side as shown in FIG. 4 or the caulking portion 50 of the fixed contact piece 40 shown in FIG. May be brought into contact with.

Further, in addition to the buzzer sound transmitting means by interposing the rigid body, an elastic body such as a leaf spring 60 may be interposed as shown in FIGS. 6 and 7 to increase the buzzer sound.

[Brief description of drawings]

1 and 2 are respectively a circuit configuration diagram and a partially cutaway front view showing an example of a vehicle blinking device according to the present invention, FIG. 3 is a time chart for explaining the operation of the device, and FIGS.
FIG. 7 is a partially cutaway front view or a partial sectional view showing a modified example of the means for mechanically transmitting the buzzer sound of the device. 4 ... Power supply terminal, 5 ... Load terminal, 7 ... Flashing load circuit, 11 ... Load connection switch, 12 ... Relay, 14 ...
Intermittent relay drive control circuit, COM …… common contact, NC …… normally closed contact, NO …… normally open contact, RC …… relay coil.

Claims (1)

[Claims] 1. A relay having normally open, normally closed, and common contacts, one end of a relay coil being connected to a power supply terminal, and a switch for load connection interposed between a load terminal and a blinking load circuit. , The input end is connected to the power supply terminal via the relay coil, the output end is connected to the load terminal, oscillates by turning on the load connection switch, and energizes the relay coil at a constant cycle. With a relay intermittent drive control circuit to control, connect the normally open contact of the relay to the power supply terminal,
A vehicle blinking device, characterized in that a common contact is connected to a load terminal and the other end of the relay coil is connected to the normally closed contact.