JPS6033082Y2 - Seat belt warning device - Google Patents

Description

[Detailed description of the invention] This invention not only issues a warning to encourage occupants to securely fasten the safety belts installed on the seats of automobiles, but also prevents drivers from closing the door without taking any precautions. lock,
The present invention also relates to a seatbelt warning device that prevents the driver from leaving the vehicle.

Conventionally, □Cars have been equipped with seatbelts as a safety device, but the actual rate of use of them has been low, and the problem has been that the safety devices do not function properly.□In order to encourage the use of seatbelts, For example, a belt switch installed inside the belt reliever can be used to display a lamp indicating that the seat belt is not fastened, and a seat switch installed inside the seat and the belt switch can detect whether the seat belt is being worn normally. , If it is not worn normally, open the engine starting circuit,
□Methods have been proposed to prevent the engine from starting, but the former simply uses a belt switch to display a lamp, so not only is it less effective as a warning, but 1. When actually driving with a seatbelt worn, the belt switch often malfunctions due to vibrations or the movement of the occupant's body, making it impractical. Since the engine does not start, it is highly effective in encouraging seatbelt use, but it is easy to mistake it for engine trouble, and to correct this situation requires a relatively complex device, which is ultimately expensive and impractical. .

On the other hand, car doors are usually equipped with a so-called automatic locking mechanism that allows the door to be automatically locked by pulling the handle from outside the car and closing it without using a key. There is a problem that many situations occur where the door is locked without forgetting to remove the key.One possible way to solve this problem is to install a separate device to prevent the user from forgetting to remove the key. There was a problem with over-equipment.

SUMMARY OF THE INVENTION The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art by providing a relatively simple seatbelt warning device consisting of a door switch, a seat switch, and a control circuit.

Next, the configuration of an embodiment of the present invention will be explained with reference to the drawings.

The drawing is an electrical circuit diagram illustrating one embodiment of the device of the present invention.
The A side of the switch S1 is attached to the door of a car, etc., and the A side is turned on when the door is opened, and the B side is turned on when the door is closed.The A side of the switch S1 is connected to Noah N0R1, and the B side is connected to Noah N0R2. , the neutral point is grounded, and the Noah N
A first detection circuit is constituted by a flip-flop circuit constituted by ORl and NOR2 and the door switch S1, and the output of the NORl becomes a set input of the first flip-flop circuit FFl, which generates a door open signal. is stored in the flip-flop circuit FF1, and the output is stored in the first gate-circuit NANDl.
In addition, the A side of the seat switch S2, which is installed in the seat of a car, etc., turns on the A side when a passenger takes a seat in the seat, and turns the B side on when the passenger leaves the seat. The B side is connected to the Noah NOR4, and the neutral point is grounded. The output of Noah NOR3 is Noah NOR5.

One-shot multivibrator and NAND3 composed of NOR6, capacitor C1, and resistor R7
It becomes an input to the first gate circuit NOR7 through the gate circuit, and operates the NOR7 together with the output of the flip-flop circuit FFl, and the output is input to the second flip-flop circuit FF2, where A door opening signal and a passenger seating signal are stored, and the output of the second flip-flop circuit FF2, the output of the first flip-flop circuit FFI, and the door closing signal from the first detection circuit are stored. Together, they form the second gate circuit, NAND.
The output is inputted to a third flip-flop circuit FF3 via NAND2, where the door open signal, occupant seating signal, and door close signal are stored, and the third flip-flop circuit FF3 is flip-flop circuit FF
Darlington-connected transistor TRI is turned on and off by the output of 3□, and relay RLI is turned on by turning on TR2.
is activated, and the power supply VDD &
After i, the connected tape recorder L1 starts operating.

Then, when the tape end mark provided on the tape of the tape recorder L1 activates the tape end sensor S4, a tape end signal is sent to an external protection circuit consisting of a resistor R14 and a capacitor C3, The first, second, - third flip-flop circuits FFl, FF2 . This becomes the reset input for FF3, and all of these are reset.

In addition, the A side of the key switch S3, which is attached to the key cylinder of an automobile, turns on the A side when the key is inserted into the key cylinder, and turns on the B side when the key is removed, is set to the Noah NOR$. Also, the B side is connected to Noah N0R9, and the neutral point is grounded. Noah N0R8 and Noah N
0R9 and the key switch S3 constitute a third detection circuit, which is connected to the output of the front NOR$ and the NOR2 of the first detection circuit. Noah N0RI Q, N0
The output of the one-shot multivibrator circuit consisting of R1l, capacitor C2, and resistor RIG and the output of NOR4 of the second detection circuit operate the third gate circuit NAND4.1. The output becomes the set input of the key ρ flip-flop circuit FF4 via the NAND5, and the key insertion signal is stored in the flip-flop circuit FF4, and is turned on and off by the output of the fourth flip-flop circuit FF4. When Darlington-connected transistors rR3 and TR4 are turned on, relay RL2 is activated, and relay RL2. The solenoid L2 connected to the power supply VDD via the contact is actuated.

In addition, the Noah N0R1, N0R2, NOR3°N0R
4, NOR@, N0R9, tape end sensor S4 is a circuit element of each resistor R1, R2, R5゜R6, R8, R
In addition to being connected to the power supply vDD via R13, the transistors m1 to TR4 are connected to each resistor R3, which is a circuit element.
R4, R11, and R12 are connected to each other.

Next, the operation of this embodiment will be explained.

First, when the occupant closes the door after opening the door and sitting on the seat, the door switch S1 turns on to the A side, and the output of the first detection circuit NORl becomes the power supply potential. The flip-flop circuit FFl is set to store the door open signal, and the first input of the first gate circuit, NANDi, is set to the power supply potential.Subsequently, the seat switch S2 is turned on to the A side, and the second detection circuit is turned on. The output of NOR3 becomes the power supply potential, which is converted into a pulse signal by the one-shot multivibrator, and is inverted by NAND3 to become the ground potential, and together with the negative logic output of the first flip-flop circuit FFl, the second Apply a ground potential to the input of NOR N0R7, which is the gate of
The third input of ND1 is set to the power supply potential, and when the door is subsequently closed, the first detection circuit is inverted and the second input of NAND1 is set to the power supply potential as the output of NOR2□, Therefore, a third flip-flop circuit FF3 is set via NAND2, and the door open signal, passenger seating signal, and door close signal are stored therein, and the transistors TRI and TR2 are turned on to operate the tape recorder L1. , the tape recorder L1 can issue a warning to encourage you to fasten your seatbelt, for example 1, to protect your safety, make sure to fasten your seatbelt, and furthermore, by rotating the tape recorder L1. When the warning ends, the tape end sensor S4 is turned on by the tape end mark and applies ground potential to the input of NOAH NOR12.
The output of No. 12 is pulsed by a one-shot multivibrator, and the power supply potential is applied to all reset inputs of the first, second, and third flip-flop circuits FF1 to FF3, and the memory of each signal is erased. and return.

It goes without saying that the warning content of the tape recorder L1 can be recorded by the user at will. For example, if the warning is announced in the voice of the person most loved by the crew member, the warning effect will be outstanding. If the tape recorder L1 is a multi-channel system and a channel selector is provided, a different announcement can be heard each time the tape recorder L1 is used.The scope of application of warnings by the tape recorder L1 is extremely wide.

Second, if the occupant opens the door, then closes the door and then sits down in the seat, the second output of the door opening memory node N0R2 in the first flip-flop circuit FFI is
The three conditions for memorizing seating in the flip-flop circuit FF2 are met, and the same effect as the first effect occurs.

Thirdly, even if each of the switches Sl and S2 chattering, the contents of each signal once stored are all stored regardless of the operation of each switch Sl and S2, and each flip-flop circuit FF1 to Since it is held as long as the FF3 heliset signal is not input, malfunctions due to chattering will not occur.

Fourth, if the passenger forgets to remove the key and tries to exit the vehicle (leave the seat) by opening the door, the key switch S
3 turns on the A side, the output of the third detection circuit NOOR NOR$ becomes the power supply potential, and the sheet switch S2 turns on the b side, NOAH NOR4 becomes the power supply potential, and furthermore, the Donna switch S1 becomes the A side, and NOAH NORl becomes the power supply potential, outputs the third gate NAND4, sets the fourth flip-flop circuit FF4, and stores that the driver is about to get out of the vehicle without removing the key, and the transistor Turn on TR3 and TR4 to turn on tape recorder L1 and tape recorder L1.
The track switching solenoid L2 is activated, and the tape recorder L1 issues a warning that the driver has forgotten to remove the key, allowing the driver to realize that he or she has forgotten to remove the key.If the driver then removes the key, the key switch S3 is reversed. Te Noah NOR9
The output becomes the power supply potential, resets the fourth flip-flop circuit FF4, and at the same time a reset signal is inputted to each of the flip-flop circuits FF1 to FF3 by the tape end sensor S4, and all the circuits return to the state before operation.

Next, the effects of the present invention will be explained.

The present invention provides a first detection circuit that inverts the output signal depending on the opening and closing of the vehicle door, such as Noah N0R1 and N0
A first detection circuit of a flip-flop circuit consisting of R2 and a second detection circuit that generates an output signal when an occupant is seated on a seat of a vehicle, for example, a second detection circuit of a flip-flop circuit consisting of /A NOR3 and N0R4. a detection circuit, a one-shot multivibrator that generates an output for a certain period of time after seating according to the seating output signal from the second detection circuit;
A sound generating device for generating a seatbelt fastening warning sound, which is activated by a change in the output of the detection circuit and the output from the one-shot multivibrator for a certain period of time after seating, for example, each NAND1, NAND2, and NOAH N0R7.
and each flip-flop circuit FFl to FF3, each transistor TRI, TR2, each resistor R3, R4, and relay RLl
and a tape recorder L1, respectively, and a seatbelt fastening warning device including the sound generating device for generating a seatbelt fastening warning sound.

As a result, the present invention eliminates unnecessary warnings and generates a warning sound that prompts people to fasten their seatbelts immediately after getting into the vehicle at the appropriate time, increasing the rate of seatbelt use and, in turn, improving occupant stability in the event of a traffic accident. There is an effect that can be achieved.

Furthermore, in this embodiment, it is possible to prevent the driver from accidentally locking the door without taking out the key after driving, thereby preventing theft of the automobile, etc. It can be distantly related with substantially the same configuration as the device for warning of wear, and therefore there is no need to add a device just for this purpose, and it has the advantage of being able to be provided at a relatively low cost.

Further, since each signal of each detection circuit can be stored with a simple configuration using a flip-flop circuit, there is no malfunction due to chattering of each signal, and an extremely highly reliable device can be provided.

Furthermore, as mentioned above, it has a simple circuit configuration and C-MO
Since S has a circuit configuration that can be easily integrated into an IC, power consumption can be reduced during implementation, the entire device can be made compact, and it can be installed relatively easily in conventional vehicles. .

[Brief explanation of drawings]

The drawing is an electrical circuit diagram of an embodiment of the present invention. SL...Door switch, S2...Seat switch, S3...Key switch, FF1~
FF4...Flip-flop circuit, N0R1~
NOR14...Noah, vDD...Power supply, NANDl~NAND5...Nand, TRI
~TR4...Transistor, RLl~RL2・
...Relay, Ll...Tape recorder,
L2...Solenoid, R1-R15...
・Resistance, C1 to C4...Capacitor.

Claims (1)

[Scope of utility model registration request] a first detection circuit that inverts an output signal when a vehicle door is opened and closed; a second detection path that generates an output signal when an occupant is seated on the double-sided seat; and the second detection circuit. A one-shot/multivibrator that generates an output for a certain period of time after seating based on an output signal from the driver, and a table of output changes of the first detection circuit when the donor closes after a pause. A seat belt fastening warning device comprising: a seat and a belt fastening warning spring sound generating device which are activated by an output for a certain period of time after seating from the break.