JPH0459180B2 - - Google Patents

Description

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

BACKGROUND ART For at least one pair of direction indicator lights of a vehicle,
It has a configuration in which a circuit that selectively supplies a blinking current and a tapping sound generating section that generates a tapping sound in synchronization with the blinking of this blinking current are housed in a single housing, making it compact and easy to install in a vehicle. A vehicle-mounted direction indicator light flashing device that is easy to operate is known, for example, from Japanese Utility Model Publication No. 57-5227.

In order to reduce the weight and cost of such conventional vehicle-mounted direction indicating devices, it is conceivable to form the housing from synthetic resin. However, when the housing is made of synthetic resin, there is a problem in that the hitting sound produced by the hitting sound generating section becomes low.

OBJECTS OF THE INVENTION Therefore, an object of the present invention is to house a blinking signal generating means and a tapping sound generating section that generates a tapping sound in synchronization with the blinking cycle of the blinking signal by the blinking signal generating means in a synthetic resin housing. To provide a vehicle-mounted direction indicator light flashing device which is lightweight and low cost and can generate a sufficiently strong hitting sound.

Composition of the Invention The vehicle-mounted turn signal flashing device according to the present invention includes a cylindrical housing made of synthetic resin having a closed end and to be mounted on a vehicle, and a movable housing movably disposed near the inner wall of the closed end. a biasing means for applying a biasing force to the movable element in a direction toward the inner wall of the closed end; an electromagnetic force generating means for attracting the movable element against the biasing force in accordance with a drive current; A metal plate that is placed in close contact with the inner wall, a hammer that is fixed to the movable element and that comes into contact with the metal plate and generates a tapping sound when the electromagnetic force generating means attracts the movable element and then releases it; A vehicle-mounted direction indicator light blinking device comprising a drive circuit that selectively applies a blinking signal to at least one pair of direction indicator lights and supplies an on/off signal synchronized with the blinking signal to an electromagnetic force generating means as a drive signal, A flange portion is formed on the outer periphery of the cylindrical housing near the closed end, and a cylindrical metal resonator is fitted onto the outside of the cylindrical housing on the closed end side with the cylindrical metal resonator being locked at the flange. ing.

Effects of the Invention In the vehicle-mounted turn signal flashing device configured as described above, the hammer strikes the metal plate that is in close contact with the inner wall of the closed end of the housing, further causing large vibrations by the metal resonator.

Embodiment FIGS. 1 and 2 show a specific example of a vehicle-mounted direction indicator light flashing device according to the present invention. In this device, a cylindrical plastic case 1 that is closed at the top and open at the bottom is used as a housing, and a disk-shaped printed circuit board 2 is inserted and mounted on a reduced-diameter shelf at the lower end of the opening of the case 1. Components such as capacitors, resistors, transistors, etc. are placed on the board 2, and the coil support member 4 is fixed on the board 2, thereby holding the relay coil RY.
Wiring between these is done by printed wiring provided on the back or front surface of the printed circuit board 2. A holding post 5 holding a contact spring 3 carrying a movable contact at its end is implanted on the coil support member 4 along the side of the relay coil RY.
The contact spring 3 carries a hammer 3a, and each time the contact spring 3 is restored, it hits the top closed surface of the case 1, and a resonance ring as a resonator made of metal such as iron is applied to the vibration of the case 1 generated at this time. 6 resonates to produce a strong hitting sound. The resonance ring 6 is connected to the case 1 at the flange on the side surface of the closed end of the case 1.
is engaged in.

A terminal support member 7 is provided on the back surface of the board 2.
It supports book terminals 8, 9, and 10. terminal 8,
9 and 10 extend to the lid portion through a lid member 11 that presses and fixes the substrate 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. By the way, terminals 8, 9, and 10 are the power supply, ground, and load terminals, and the load terminals have a changeover switch SW.
movable contacts are connected. 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 indicator light flashing 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. Also, case 1
is made of a plastic material with relatively low internal loss, such as PBT, PET, or PPS, and 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.

Further, 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.

FIG. 3 shows an example of a drive circuit for a vehicle-mounted turn signal flashing 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 is closed, 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 the diaphragm DM
Hit it to make a tapping sound. When the relay switch ry is closed, the power supply voltage from the on-board battery or the like is relayed to the movable contact of the changeover switch SW via the resistor _R1 . The fixed settings S _L and S _R of the changeover switch SW have 2
Pair of direction indicator lights (hereinafter referred to as lamps) L ₁ ,
R ₁ , L ₂ , and R ₂ are connected. Lamp L ₁ , R ₁
is placed, for example, at the front of the vehicle, and L ₂ and R ₂ are placed at the rear of the vehicle.

The timer circuit that intermittently excites the relay coil RY is connected in series with the relay coil RY using an NPN transistor _Q1 that operates as an excitation switch.
Contains. The base of transistor _Q1 is a resistor
It is connected to the collector of the PNP transistor _Q2 via _R2 . The emitter of transistor _Q2 is connected to the power supply +B. A capacitor _C1 and a resistor are connected between the base and emitter of the transistor _Q2 .
R ₃ are connected in parallel with each other. A series circuit of capacitors _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 SM of the changeover switch SW.

Transistor Q ₃ , resistor R ₆ , resistors R ₆ , R ₇ , R ₈ and diode D constitute an intermittent cycle changing circuit that warns of burnout of the lamp filament.

In the circuit configured as above, the changeover switch
When the movable contact SM of SW is brought into contact with, for example, the fixed contact S _L , the lamps L ₁ , L ₂ and the resistors R ₃ , R ₅
A monitor current flows through the However, in this case, the lamp does not light up yet. On the other hand, the potential at the connection point between resistors R ₃ and R ₅ decreases, and when capacitor C ₁ is fully charged, transistor Q ₂ is turned on. transistor
When Q ₂ turns on, transistor Q ₁ turns on, and
Relay RY is energized, relay switch ry is closed, and lamps L ₁ and L ₂ are lit. When transistor Q ₁ is turned on, charging of capacitor C ₂ begins, and the base potential of transistor Q ₂ begins to rise.
Also, the lamp L ₁ due to the closing of the relay switch ry,
Due to the inflow of lighting current into L ₂ , the terminal potential of lamps L ₁ and L ₂ , that is, the movable contact of changeover switch SW
The potential of SM increases. Therefore, once the capacitor _C2 has been charged to a certain extent, the transistor
The base potential of Q ₂ rises enough to cause the transistor to
Q ₂ is turned off, transistor Q ₁ is also turned off, and the relay coil RY is deenergized. In this way, the intermittent switch ry is released and the lamp goes out. With transistor Q ₁ turned off, capacitor C ₂ is discharged via resistor R ₅ and lamps L ₁ and L ₂ . As the discharge of capacitor _C2 progresses, the transistor
The base potential of Q ₂ decreases and the transistor Q ₂
turns on. Transistor _Q1 then turns on, energizing the relay coil RY and turning on the switch RY.
closes and the lamp lights up again. In this way, as long as the movable contact of the 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.Meanwhile, the base of transistor _Q3 of the intermittent cycle adjustment circuit The potential is maintained at the divided voltage output of the voltage dividing circuit consisting of diode D and resistors R ₇ and R ₈ and transistor Q ₃ is turned on, and the collector potential of transistor Q ₃ can change depending on its emitter potential. .

Here, for example, if the filament of either lamp L ₁ or L ₂ burns out, the relay switch
The lamp excitation current when ry is closed is about half, and the emitter potential, that is, the collector potential of transistor _Q3 increases. Therefore, transistor Q ₂
The base potential of the transistor increases as a whole.
_Q2 's timing from on to off is brought forward and the intermittent cycle becomes earlier, allowing the passenger to hear the rapid-cycle tapping sound and know that the lamp is out.

Effects of the Invention As is clear from the above, the in-vehicle direction indicator light blinking device according to the present invention combines a drive circuit that causes the direction indicator light to blink and a tapping sound generating section that generates a tapping sound in synchronization with the blinking. It is housed in a single housing made of resin, and a metal plate is interposed on the inner wall of the striking part of the housing, and a metal resonator is fitted on the outside of the metal plate, making it compact, lightweight, and low cost. At the same time, a sufficiently loud hitting sound can be obtained.

Further, a flange portion is formed on the outer periphery of the cylindrical housing near the closed end, and a cylindrical metal resonator is fitted onto the outside of the cylindrical housing on the closed end side while being locked by the flange. Since it can be dressed, assembly becomes easier and productivity is improved.

[Brief explanation of the drawing]

1 and 2 are a sectional view and a perspective view showing an example of the overall configuration of a vehicle-mounted direction light flashing device according to the present invention, and FIG. 3 is a drive of the vehicle-mounted direction light flashing device shown in FIGS. 1 and 2. FIG. 2 is a circuit diagram showing an example of a circuit. Explanation of the symbols of the main parts, 1...Case, 2...
Printed circuit board, 6...Resonance ring, 14...Metal plate, RY...Intermittent relay coil, ry...Hitting sound generating relay switch, _R1 , _R2 , _L1 , _L2 ...Direction indicator lamp, SW... ...Toggle switch.

Claims (1)

[Claims] 1. A cylindrical housing made of synthetic resin that has a closed end and is to be mounted on a vehicle, a movable element movably disposed near the inner wall of the closed end, and a movable element that has an inner wall of the closed end. a biasing means for applying a biasing force in the direction of the biasing force, an electromagnetic force generating means for attracting the movable element against the biasing force in accordance with a drive current, and a metal plate disposed in close contact with an inner wall of the closed end. and a hammering element that is fixed to the movable element and comes into contact with the metal plate to generate a hammering sound when the electromagnetic force generating means attracts the movable element and then releases it;
A drive circuit that selectively applies a blinking signal to at least one pair of direction indicator lights of the vehicle and supplies an on/off signal synchronized with the blinking signal to the electromagnetic force generating means as the drive signal. In the device, a flange portion is formed on an outer periphery of the cylindrical housing near the closed end portion, and a cylindrical metal resonator is disposed outside the cylindrical housing on the side of the closed end portion of the flange portion. A vehicle-mounted direction indicator light flashing device characterized by being fitted in a locked state.