JPS6317139A - Direction indicating device mounted onto vehicle - Google Patents

Abstract

PURPOSE:To generate a large beating noise in a proper interruption cycle by controlling the electric charge and discharge of a timer circuit in another system, according to the variation of the potential in a series circuit of a direction indication lamp, selecting switch, and an interruption switch. CONSTITUTION:When the movable contact point SM of a selecting switch SW contacts a fixed contact point SR, the Potential at the connection point between resistors R3 and R5 lowers, and at the completion of charge of a capacitor C1, an transistor Q2 is turned ON. Then, Q1 is turned ON, and a relay RY is excited to close a beating noise generating relay switch ry, and lamps L1 and L2 light up. At the same time, C2is charged, and if Q2 is turned OFF at the time point when charging operation considerably proceeds, also Q1 is turned OFF, and RY is deenergized, and lamps light OFF. C2 is electric-discharged by the turning-OFF of Q1, and in the process of the electric discharge, Q2 is turned ON again, and lamps light up again. At this time, a large beating sound is generated in the switch ry.

Description

[Detailed description of the invention] Technical field The present invention relates to a vehicle-mounted direction indicating device.

BACKGROUND ART A conventional example of a vehicle-mounted direction indicating device is shown in Fig. 1. This conventional example is called a so-called capacitor relay set, and voltage is selectively supplied to the direction indicator lamps R and L by a changeover switch SW. That is, the direction indicator lamps R and L are connected to the fixed contacts of the changeover switch SW, respectively, and the changeover contacts are connected to the power source B via the first coil CLI of the two-winding relay RL and the hammering sound generating relay switch rfl. There is. When an operating current flows through the first coil CLI or CL2, the hammering sound generating relay switch "g" is opened.
1 has a structure as disclosed, for example, in Japanese Utility Model Publication No. 57-5227, in which a hammer is provided on the movable contact member of the relay switch and the diaphragm is struck each time the switch is opened or closed to generate a hammering sound. I try to do that.

On the other hand, the second coil CL2 is connected in series with the capacitor CO between the power supply and the switching contact of the switch SW.

In the conventional circuit having such a configuration, when the changeover contact of the changeover switch SW is connected to either one of the lamps L or H, an operating current flows through the first coil CL+, the hammering sound generating relay switch rfl is opened, and the first coil CL+ is opened. The operating current of the coil CL+ is cut off, but while the charging current of the capacitor CO is flowing through the second coil CL2, the hammering sound generation relay switch r
fl remains open. When charging of the capacitor Co is completed, the hammering sound generation relay switch rfI is restored and
The operating current flows through the first coil CL+ again, but at this moment, the charge in the capacitor Co flows in the opposite direction through the second coil CL2 and is discharged. The hitting sound generating relay switch rl continues to be in the open state until the end of the discharge. When the discharge of the capacitor CO is completed, it becomes the initial state, and the hammering sound generation relay switch r (l) operates again and opens.The same operation continues as long as the changeover switch SW is in operation, and the lamp blinks and the hammering sound continues. That's what I do.

In such a conventional example, a relay switch r for generating a tapping sound
P is a normally closed switch, and when it operates, it hits the diaphragm to generate a tapping sound, so in order to generate a strong hitting sound, it is better to weaken the spring of the break contact of relay switch RL as much as possible. good. However, if the contact spring is weakened too much, the recovery timing of the break contact will be delayed and the intermittent cycle will be extended, which is a problem. Therefore, in this conventional example, setting the relay characteristics is difficult;
Obtaining a strong hitting sound is not easy. Furthermore, there is also the problem that the intermittent cycle varies greatly due to variations in the characteristics of the relay or capacitor, changes over time, and the like.

On the other hand, in the vehicle-mounted direction indicating device as disclosed in the above-mentioned Japanese Utility Model Publication No. 57-5227, a tapping sound is generated when the relay is restored. It is better to make the contact spring of the sound generating relay switch stronger, but if the contact spring is made stronger, the operating current must be sufficiently increased to increase the attractive force of the contact.

However, the oscillation circuit connected to this device is connected in parallel to the hammering sound generating relay switch, and is short-circuited when the relay switch is operated. It should be configured. Therefore, there is a problem that the contact spring cannot be made too strong in order to obtain a sufficient contact holding time due to the discharge current, and it is easy to select the element or set the characteristics to generate an appropriate intermittent cycle and sufficient hammering sound. The problem was that it wasn't.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a vehicle-mounted direction indicating device that can generate a sufficiently loud hitting sound while obtaining an appropriate intermittent cycle.

In the vehicle-mounted direction indicating device according to the present invention, a timer circuit is provided in a separate system from the series circuit of the hammering sound generating relay switch, the direction changeover switch, and the direction indicating lamp, and a series circuit for changing the terminal voltage of the direction indicating lamp, etc. The timer circuit monitors potential changes at a predetermined point in the air, and the timer circuit intermittently excites the hammering sound generating relay coil.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to FIG. 2 and the subsequent drawings.

FIG. 2 shows an embodiment circuit of a vehicle-mounted direction indicating device according to the present invention. In this circuit, a relay coil RY and a tapping sound generating switch ry cooperate with each other to form a so-called relay. When the relay coil RY is energized, the hammering sound generating relay switch ry closes, and when the relay coil RY is de-energized, the hammering sound generating relay switch (hereinafter simply referred to as the relay switch) ry is restored and hits the diaphragm DM, producing a hammering sound. occurs. When the relay switch ry is closed, the power supply voltage of the vehicle battery or the like is relayed through the resistor R1 to the movable contact of the changeover switch SW. Changeover switch S
The fixed settings SL and SR of W include two pairs of direction indicator lamps L1. RI and L2°R2 are connected. The direction indicator lamps Ll and R1 are arranged at the front of the vehicle, for example, and Lz
, R= are located at the rear of the vehicle.

A timer circuit that intermittently excites the relay coil RY includes an NPN transistor Q1 that is connected in series with the relay coil RY and operates as an excitation switch. The base of transistor Q1 is connected to the collector of PNP transistor Q2 via resistor R2. The emitter of transistor Q2 is connected to power supply B. A capacitor C1 and a resistor R3 are connected in parallel between the base and emitter of the transistor Q2. A series circuit of capacitor C2 is connected between the base of transistor Q2 and the collector of transistor Q1. A relatively large resistor R5 for voltage monitoring is connected between the base of the transistor Q2 and the movable contact of the changeover switch SW.

Transistor Q3, resistor R6 + resistor R6 + Ry IR
8 and diode D are an intermittent cycle changing circuit that warns of burnout of the lamp filament.

In the embodiment circuit configured as above, the changeover switch S
When the movable contact W is brought into contact with, for example, the fixed contact SL, a monitor current flows through the lamps L, , L, 2 and the resistors R3, Rs. However, in this case, the lamp does not light up yet. On the other hand, the potential at the connection point between the resistors R3 and R5 decreases and when the capacitor C1 is completely charged, the transistor Q2 is turned on. When transistor Q2 is turned on, transistor Q1 is turned on, relay RY is energized, relay switch ry is closed, and lamps Ll and L2 are lit.

By turning on the transistor Q1, charging of the capacitor C2 starts, and the base potential of the transistor Q2 starts to rise. In addition, the lamp L due to the opening of the relay switch ry
Due to the inflow of lighting current into L, L2, the lamps L, L2
The terminal potential of , that is, the potential of the movable contact of the changeover switch SW increases. Therefore, when the capacitor C2 has been charged to a certain extent, the base potential of the transistor Q2 becomes sufficient.

As a result, transistor Q2 is turned off, transistor Q1 is also turned off, and relay coil RY is deenergized. In this way, the intermittent switch ry is released and the lamp goes out. By turning off the transistor Q1, the capacitor C2 is discharged through the resistor R5 and the lamps L1 and L2. As the discharge of the capacitor C2 progresses, the base potential of the transistor Q2 decreases and the transistor Q2 is turned on again. Next, transistor Q1 is turned on, relay coil RY is energized, switch y is closed, and the lamp is lit again. In this way, as long as the movable contact of changeover switch SW is in contact with one of the fixed contacts, The direction indicator lamp lights up intermittently, and a tapping sound is also generated at the same time.

On the other hand, the base potential of the transistor Q3 of the intermittent cycle adjustment circuit is maintained at the divided voltage output of the voltage dividing circuit consisting of the diode D and resistors R7 and R3, and the transistor Q3 is turned on, and the collector potential of the transistor Q3 is set to its emitter. It can vary depending on the potential.

Here, for example, if one of the filaments of the lamp L+lL2 breaks, the lamp excitation current when the relay switch ry is opened becomes about half, and the transistor Q
The emitter potential or collector potential of No. 3 rises. Therefore, the base potential of the transistor Q2 increases as a whole, the timing from on to off of the transistor Q2 becomes earlier, and the intermittent cycle becomes earlier, and the passenger can hear the rapid cycle hitting sound and know that the lamp is burnt out. be.

FIG. 3 shows a specific example of a vehicle-mounted direction indicating device including the above-described embodiment circuit. In this device, a disk-shaped printed circuit board 2 is inserted and mounted on a reduced-diameter shelf at the lower end of a cylindrical plastic case 1 that is closed at the top and open at the lower end. Components such as capacitors, resistors, transistors, etc. are placed on the substrate 2, and the coil support member 4 is placed on the substrate 2.
This holds the relay coil RY by fixing it on top.
Wiring between these is done by printed wiring provided on the back or front surface of the printed circuit board 2. A holding column 5 holding a contact spring 3 carrying a movable contact at its end is attached to a coil support member 4 along the side of the relay coil RY.
is planted on top.

The contact spring 3 carries a hammer 3a, and each time the contact spring 3 is restored, it strikes the top closed surface of the case 1, and a resonance ring 6 made of metal such as iron resonates with the vibration of the case 1 generated at this time. I try to get a strong hitting sound. resonance ring 6
is engaged with the case 1 at the flange portion on the side surface of the closed end of the case 1.

A terminal support member 7 is provided on the back surface of the board 2, and three terminals 8, 9. 10 is supported. The terminals 8°9.10 extend into the lid portion through a lid member 11 that presses and fixes the board 2 from the outside. A seal ring 12 is press-fitted into the edge of the lid member 11 to seal the inside of the case 1. A coupler 13 is fixed on the outside of the lid member 11 to facilitate connection with an external circuit. Incidentally, terminals 8, 9, and 10 are power supply, ground, and load terminals, and the movable contact of the changeover switch SW is connected to the load terminals. Further, a hook-shaped body 13a is provided at the bottom of the coupler 13 to maintain engagement of the coupler 13 with another coupler (not shown).

According to the direction indicating device configured as described above, the entire circuit is sealed within the case 1, and even if the device is exposed to water, the water will not enter the case 1 and will not be adversely affected. Furthermore, the case 1 is made of a plastic material with relatively low internal loss, such as PBT, PET, or PPS, so that the hitting sound is transmitted to the resonance ring 6 without attenuation.

Furthermore, since the case 1 is made of insulating plastic, there is no need to provide special insulation to the relay contact that supports the hammer, which is preferable.

The vehicle-mounted direction indicating device shown in FIG. 4 has the same structure as the example shown in FIG. 3, except that a metal plate 14 is press-fitted into the back surface of the closed end of the case 1.

The metal plate 14 provides a louder hitting sound.

Effects of the Invention As is clear from the above, the on-vehicle direction indicating device according to the present invention charges and discharges the timer circuit of another system in accordance with potential changes in the series circuit of the direction indicator lamp, changeover switch, and intermittent switch. Since the relay coil of the intermittent relay switch is energized intermittently by the timer circuit in a controlled manner, the charging/discharging current of the timer circuit and the operation or holding current of the relay coil of the intermittent relay can be set independently. The strength of the contact spring of the intermittent relay can be freely set. Therefore, it is possible to obtain a sufficiently loud hitting sound while obtaining an appropriate intermittent cycle. Therefore, it is particularly suitable for use in vehicles where the external noise to the occupants is intense, such as in vehicles without a passenger compartment (cabin) such as motorcycles.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a conventional vehicle-mounted direction indicating device, FIG. 2 is a circuit diagram showing a vehicle-mounted direction indicating device according to the present invention, and FIG.
Figures (A), (B), and Figure 4 are a sectional view and a perspective view showing an example of the overall configuration of a vehicle-mounted direction indicating device according to the present invention. Explanation of symbols of main parts RY... Intermittent relay coil ry... Hitting sound generating relay switch R1, R1+
Lll L2・・・Direction indicator lamp SW・
...Changeover switch...Case 2...Printed circuit board 6...Resonance ring applicant Honda Motor Co., Ltd. agent Patent attorney Motohiko Fujimura +B Figure 3 ( A) (B)

Claims (1)

[Claims] an intermittent switch connected in series to a changeover switch that selectively turns on at least one pair of direction indicator lamps; an intermittent sound generating section that emits a tapping sound in conjunction with the operation of the intermittent switch; and when excited, the intermittent switch a relay coil that operates the switch, a power supply that applies voltage to a series circuit consisting of the changeover switch, the intermittent switch, and the direction indicator lamp, and a pulse voltage that is generated in response to potential changes in the series circuit that includes the direction indicator lamp; This includes a timer circuit that intermittently excites the relay coil, and causes the direction indicator lamp to blink at a period determined by the timer circuit, and to generate a tapping sound from the tapping sound generating section at the same period. A distinctive feature of the vehicle-mounted direction indicating device.