JPH0811679A - Seat belt fastening confirmation device and safety relay for the device - Google Patents

Abstract

PURPOSE:To secure the lighting of a warning lamp when a seat belt is not fastened and provide a unitized safety relay suitable for a seat belt fastening confirmation device in the seat belt fastening confirmation device which allows starting of an engine only when the seat belt is fastened. CONSTITUTION:A movable contact 11 and a fixed contact 8 are arranged in series between a key switch 3 and a start mechanism 2, the movable contact 11 is moved between the contact position with the fixed contact 8 and a non- contact position by a coil 12 of which one end is connected to the key switch 3, the upstream terminal of a diode 13 is connected to the other end of the coil 12, and the downstream terminal of the diode 13 is connected to an earth 4 through a fastening detector switch 6 to detect the presence or absence of fastening of a seat belt. Also a warning lamp 5 is connected between the downstream terminal of the diode 13 and the fastening detector switch 6. Then, when the fastening of the seat belt is detected by the fastening detector switch 6, the movable contact 11 is made in contact with the fixed contact 8 to connect the key switch 3 to the start mechanism 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seatbelt wearing confirmation device for detecting whether or not a seatbelt of a vehicle such as an automobile is worn and allowing the engine to be started only when the seatbelt is worn. A safety relay for a seatbelt wearing confirmation device (hereinafter, referred to as a safety relay) which is a lightweight and compact unitized device, in which the above seatbelt wearing confirmation device can be easily configured by attaching it to a new vehicle or an existing vehicle. Is.

[0002]

2. Description of the Related Art Conventionally, it has been known that a catch switch for detecting whether or not a seatbelt is worn is provided in a catch portion of a seatbelt in a vehicle compartment, and a warning light is turned on when the seatbelt is not worn. ing. However, in that case, even if the seat belt is not worn and the warning light is lit, the engine start and the vehicle traveling can be performed without any trouble, and therefore the seat belt is not necessarily forced to be worn. Therefore, the effect of reducing the degree of injury to the occupants in the event of an accident could not be expected so much.

Therefore, Japanese Utility Model Laid-Open No. 62-157661 includes a warning light that lights up when the seat belt is not worn, and disconnects the on-vehicle battery and the starter motor when the seat belt is not worn to shut off the engine. It has been proposed to provide a circuit that inhibits starting. The circuit contacts the first and second fixed contacts and one of the fixed contacts between the key switch and the starting motor in the wiring from the battery to the starting motor via the key switch (ignition switch). A relay having a movable contact is provided, the movable contact is connected to the key switch, the first fixed contact is connected to the starter motor, and the warning lamp is arranged between the second fixed contact and ground. It will be.

In the relay, when the seat belt is not worn, the movable contact comes into contact with the second fixed contact side to turn on the warning light, and when the seat belt is worn, the movable contact becomes The first fixed contact is brought into contact with the starter motor so that the starter motor can be energized.

[0005]

However, in the above structure, since the key switch is interposed between the battery and the relay, in order to turn on the warning light when the seat belt is not worn, the key switch is used. Must be closed at all times, so when the starting motor is operating,
This is inconsistent with the normal configuration of the key switch that is closed only when the engine is started, and it is doubtful whether the warning light will be reliably turned on when the seat belt is not worn.

[0006]

A seatbelt wearing confirmation device according to the present invention solves the above problems and can reliably turn on a warning light when a seatbelt is not worn with a relatively simple circuit configuration. At the same time, it is an object of the present invention to provide a seatbelt wearing confirmation device capable of prohibiting starting of the engine when not worn. Another object of the present invention is to provide a unitized safety relay in which the seatbelt wearing confirmation device can be easily configured by attaching it to a new vehicle and an existing vehicle.

Therefore, the seatbelt wearing confirmation apparatus according to claim 1 is arranged between the power source, the starting mechanism for starting the engine of the vehicle by the voltage from the power source, and the engine arranged between the power source and the starting mechanism. A key switch that connects the power source and the starting mechanism only when starting
A warning light that is connected to the power source and lights up when the seat belt is not worn, and a wear detection switch that opens and closes depending on whether or not the seat belt is worn, and the engine of the engine only when the seat belt is worn In a seat belt wearing confirmation device configured to allow starting,
A movable contact and a fixed contact arranged in series between the key switch and the starting mechanism, and one end of the movable contact and the fixed contact are connected to a terminal on the opposite side of the connection terminal of the key switch to the power source, depending on whether or not power is supplied. A coil for moving the movable contact between a contact position and a non-contact position with the fixed contact, and a diode whose upstream terminal is connected to the other end of the coil, and a downstream terminal of the diode. Is connected to the ground through the wear detection switch, and a terminal opposite to the connection terminal of the warning light with the power source is connected between the downstream side terminal of the diode and the wear detection switch, and the wear detection is performed. When the wearing of the seat belt is detected by the switch, the movable contact contacts the fixed contact to connect the key switch and the starting mechanism. And it is characterized in that they are.

The seat belt wearing confirmation device according to claim 2 is
The structure according to claim 1, wherein the wearing detection switch is a normally closed switch that is closed when the seat belt is not worn, and the movable contact is in a non-contact position with the fixed contact when the coil is energized. It is configured to move to.

According to a third aspect of the present invention, a safety relay has first and second fixed contacts arranged at a predetermined interval, and a movable contact selectively contacting either the first or second fixed contact. , A coil having one end connected to the movable contact and moving the movable contact between the first and second fixed contacts, and a diode having an upstream terminal connected to the other end of the coil in a case. The cord for connection is pulled out of the case from the first and second fixed contacts, the movable contact and the downstream side terminals of the diode, and the movable contact, the coil and the diode are provided. Or 2 movable contacts,
It is used as a coil and a diode, and one of the first and second fixed contacts is used as the fixed contact according to claim 1 or 2.

[0010]

In the seatbelt wearing confirmation device according to claim 1, the movable contact comes into contact with the fixed contact and the key switch only when the wearing of the seatbelt is detected by the wearing detection switch. And the above-mentioned starting mechanism are connected, so when the seat belt is not worn,
Since the movable contact and the fixed contact are not in contact with each other and the key switch and the starting mechanism are disconnected from each other, even if the driver tries to start the engine by closing the key switch, the starting mechanism does not work. No electricity is supplied and the engine cannot be started.

In this state, the warning light is turned on to notify the driver that the seat belt is not worn. Here, since a diode is installed between the coil and the warning light to prevent current from flowing backward from the power supply to the coil through the warning light, the operation of the movable contact is accompanied by the backflow. There will be no inconvenience.

In the seatbelt wearing detection switch according to the second aspect, the wearing detection switch is a normally closed switch, which is closed when the seatbelt is not worn.
When the seat belt is not worn, the terminal on the side opposite to the power supply of the warning light is connected to the ground through the closed wear detection switch, and current flows from the power supply to the ground through the warning light and the wear detection switch. , The above warning light is turned on.

When the driver tries to start the engine without wearing the seat belt and closes the key switch, the terminal of the key switch opposite to the power source is connected to the one end of the coil via the movable contact. Connected to the
Since the other end of the coil is connected to the ground via the diode and the wear detection switch in the closed state, a current flows from the power source to the ground via the key switch, the movable contact, the coil, the diode and the wear detection switch, The coil is energized. The movable contact is energized to the coil and moves to the non-contact position side with the fixed contact when the coil is excited, so that the current flowing through the key switch is interrupted between the movable contact and the fixed contact. As a result, the current does not flow to the starting mechanism, and the engine cannot be started.

On the other hand, in the structure of claim 2, when the seat belt is worn, the wearing detection switch is opened. Therefore, since the warning light and the ground are disconnected,
The warning light is turned off.

Further, since the wear detection switch is opened, the key switch, the movable contact, the coil,
The route to the ground via the diode and the wear detection switch is cut off by the wear detection switch, and even if the key switch is closed, the coil cannot be energized,
The movable contact is held at a position where it contacts the fixed contact.
Therefore, when the driver closes the key switch in this state, the current from the power source flows to the starting mechanism through the key switch, the movable contact, and the fixed contact, and the engine is started by the starting mechanism.

The safety relay according to claim 3 is preferably used when constructing the seatbelt wearing confirmation device according to claim 1 or 2, and comprises the first and second fixed contacts and the movable contact. The coil and the diode are housed in a single case, and only the cords for connection are pulled out of the case, which is convenient for handling.

That is, since the safety relay is unitized, it is not only easy to assemble the vehicle at the manufacturing stage of the vehicle, but also when a part built in the safety relay fails, the safety relay is replaced with a new one. can do. Further, even in the case of an existing vehicle, as described above, if the vehicle is equipped with a wearing detection switch for detecting whether or not the seat belt is worn, and a warning light in advance on the vehicle body side, this safety relay is attached. By doing so, the seat belt wearing confirmation device of the present invention can be configured.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A seatbelt wearing confirmation device according to a first embodiment of the present invention and a safety relay incorporated in this device will be described below with reference to the drawings. As shown in FIG. 1, the seatbelt wearing confirmation device provided in various vehicles such as automobiles includes a power source 1 including a battery mounted on the vehicle and a starter motor 2 (starting mechanism) for starting an engine (not shown). And a key switch 3 arranged in a path from the power source 1 to the starting motor 2 and closed at the time of starting the engine to supply the voltage of the power source 1 to the starting motor 2, and between the power source 1 and the ground 4. And a warning light 5 and a wear detection switch 6 which are sequentially arranged in series.

The warning light 5 is arranged, for example, on the display panel of the driver's seat. The wearing detection switch 6 is composed of a normally-closed switch that is in a closed state as shown in FIG. 1 when a driver or other occupant is not wearing a seatbelt (not shown). (Not shown).

A portion shown by a virtual line in FIG. 1 is unitized as a safety relay 7 which will be described in detail later. The safety relay 7 has a pair of fixed contacts 8 and 9, a movable contact 11 arranged between the fixed contacts 8 and 9, and the movable contact 11 selectively to any one of the fixed contacts 8 or 9. A coil 12 that is driven so as to be in contact with each other and a diode 13 that allows passage of a current in only one direction are provided.

The movable contact 11 is connected to the key switch 3, the fixed contact 8 is connected to the starting electric motor 2, and when the movable contact 11 is in contact with the fixed contact 8, the key switch 3 and the starting electric motor 2 are connected. Are connected. The movable contact 11 is connected to one end of the coil 12, and the other end of the coil 12 is connected to the upstream terminal of the diode 13. When the coil 12 is not energized, the movable contact 11 contacts the fixed contact 8 side, and when the coil 12 is energized, the movable contact 11 is fixed.
It comes into contact with the sides (see Fig. 2). Further, the downstream side terminal of the diode 13 is connected to the point A between the warning light 5 and the wear detection switch 6. The fixed contact 9 is not used in this embodiment.

In the above structure, when the seat belt is not worn, that is, when the wear detection switch 6 shown in FIG. 1 is closed, a current flows from the power source 1 to the ground 4 via the warning light 5 and the wear detection switch 6, When the warning light 5 is turned on, it is notified that the seat belt is not worn.

Then, when the driver closes the key switch 3 as shown in FIG. 2 for the purpose of starting the engine in the above-mentioned unworn state, the power switch 1 to the key switch 3, the coil 12, the diode 13 and the wearing A current flows through the detection switch 6 to the ground 4. As a result, the coil 12 is excited and the movable contact 11 comes into contact with the fixed contact 9 side, so that the path between the power supply 1 and the starting motor 2 is
Even though the switch 1 and the fixed contact 8 are cut off and the key switch 3 is closed, the starting motor 2 is not supplied with power. As described above, in this embodiment, the drive voltage is not supplied to the starting electric motor 2 when the seat belt is not worn, and the starting of the engine is prohibited.

On the other hand, when the driver or other occupant wears the seat belt, the wearing detection switch 6 is opened as shown in FIG. As a result, the route from the power supply 1 to the ground 4 via the warning light 5 is cut off by the wear detection switch 6, so that the warning light 5 is turned off. The coil 12
Since the diode 13 is arranged between the warning lamp 5 and the warning lamp 5 to prevent the backflow of the current from the warning lamp 5 to the coil 12, the current flows from the power source 1 to the coil 12 through the warning lamp 5, and As a result, the movable contact 11 moves irregularly back and forth between the fixed contacts 8 and 9, and a so-called chattering phenomenon does not occur.

When the seat belt is worn and the key switch 3 is opened as shown by the solid line in FIG. 3, the voltage of the power source 1 is not supplied to the starting motor 2 and the engine is started. Absent. On the other hand, when wearing the above,
When the driver closes the key switch 3 like a virtual line, a current flows from the power source 1 to the starting electric motor 2 via the key switch 3, the movable contact 11 and the fixed contact 8, and based on this, the starting electric motor 2 causes the engine to operate. Is started.
Although the fixed contact 8 is connected to the starting electric motor 2 and the movable contact 11 is connected to the key switch 3 in the above-described embodiment, conversely, the fixed contact 8 is connected to the key switch 3 and the movable contact 11 is connected to the starting electric motor 2. May be.

Next, the safety relay 7 will be described. As shown in FIGS. 4 and 5, the safety relay 7
Is the fixed contacts 8 and 9, the movable contact 11 and the coil 12
The electromagnetic switch 14 including the above and the diode 13 are housed in a case 15. The width dimension W (FIG. 5) of the case 15 is, for example, about 45 mm and the depth dimension D.
Is about 40 mm, and the height dimension H is about 40 mm, for example. In addition, a flange 15a for attaching the safety relay 7 to the vehicle body is provided on the upper rear side of the case 15.

The fixed contacts 8 and 9 in the electromagnetic switch 14
And from the movable contact 11 have a diameter of 5.5, for example.
Thick cords 8a, 9a and 11a of about mm are drawn out of the case 15 through a hole 15b at the bottom of the case 15. Further, from the diode 13, a thin cord 13a having a diameter of, for example, about 0.85 mm is provided in the hole 1
It is pulled out of the case 15 via 5b. The protruding length of each cord 8a, 9a and 11a to the outside of the case 15 is
Each is about 400 mm, and the protruding length of the cord 13a outside the case 15 is about 1500 mm.

Crimping terminals 16, 17 and 18 are provided at the tips of the cords 8a, 9a and 11a, respectively (see FIG. 5).
Is provided, and the one-touch connector 20 is provided at the tip of the cord 13a. The fixed contact 8 is connected to the starter motor 2 shown in FIG. 1 and the like by the crimp terminal 16, the movable contact 11 is connected to the key switch 3 by the crimp terminal 17, and the diode 13 is connected to the warning lamp 5 by the one-touch connector 20. It is connected to a point A between the wear detection switches 6. Since the fixed contact 9 is not used in the first embodiment, the cord 9a is not connected.
A may be cut if necessary.

If the safety relay 7 is constructed as described above, it can be easily assembled to the vehicle body at the time of manufacturing the vehicle, and if a component in the safety relay 7 should fail, the safety relay 7 can be easily replaced. can do. In addition, even if the existing vehicle is one in which the safety relay 7 is not attached at the time of manufacturing, if the vehicle is provided with the warning light 5 and the wear detection switch 6 in advance, the safety relay 7 will be used. By incorporating it, the seat belt wearing confirmation device of the present invention can be configured.

Further, even in a vehicle in which the warning light 5 and the wear detection switch 6 are not provided on the vehicle body side in advance, the safety relay 7 is attached and the wear detection switch 6 is attached to the catch portion of the seat belt. Further, by providing the warning light 5 on the surface of the case 15, for example, the seatbelt wearing confirmation device of the present invention can be configured.

The seatbelt wearing confirmation device according to the second embodiment of the present invention will be described below. As shown in FIG.
The seatbelt wearing confirmation device of the second embodiment is basically constructed in the same manner as the above-mentioned first embodiment, but as the wearing detection switch 6, a normally open switch which is opened when the seatbelt is not worn is used. In addition, the fixed contact 9 is connected to the starter motor 2 instead of the fixed contact 8, which is a difference from the first embodiment. Furthermore, the warning light 5 and the above A
The control unit 21 is arranged between the points.

Also in this second embodiment, when the coil 12 is not energized, the movable contact 11 contacts the fixed contact 8 side, and when the coil 12 is energized, the movable contact 11 is fixed.
It comes in contact with the side. The key switch 3 and the starting motor 2 are connected when the movable contact 11 is in contact with the fixed contact 9.

For example, when the seatbelt is not worn, that is, when the wearing detection switch 6 is opened (state of FIG. 6), the control section 21 is provided on the side opposite to the terminal connected to the power source 1 of the warning light 5. When the seat belt is worn, that is, when the wearing detection switch 6 is closed, while the terminal (non-power supply side terminal) of is connected to the ground (state of FIG. 7 or FIG. 8)
In addition, by disconnecting the non-power source side terminal of the warning light 5 and the ground, the warning light 5 is controlled to be turned on only when the seat belt is not worn.

In the above structure, when the seat belt shown in FIG. 6 is not worn, the wearing detection switch 6 is opened. Therefore, when the key switch 3 is opened like the solid line, the key switch is opened like the phantom line. Even if an attempt is made to close the valve 3 to start the engine, the coil 12 is not energized, so the movable contact 11 is in contact with the fixed contact 8 side, and the path between the key switch 3 and the starting motor 2 is the movable contact 11 Therefore, the starter motor 2 is not energized and the engine is not started.

Further, as described above, the wear detection switch 6
When the vehicle is opened, the control unit 21 connects the non-power supply side terminal of the warning light 5 to the ground, for example, so that the warning light 5 is turned on and the driver is informed that the seat belt is not worn.

On the other hand, when the seat belt is worn, the wear detection switch 6 is closed accordingly, and the control unit 21 controls the non-power source side terminal of the warning light 5 and the ground, as shown in FIG. The warning lamp 5 is turned off by cutting off the connection of. Even when the wear detection switch 6 is closed, if the key switch 3 is opened as shown in FIG. 7, the starting electric motor 2 is not energized and the engine is not started.

On the other hand, when the driver closes the key switch 3 when wearing the seat belt as shown in FIG. 8, the power switch 1 to the key switch 3 and the coil 1 are closed.
2, a current flows through the earth 4 through the diode 13, the wear detection switch 6, and the movable contact 11 moves to the fixed contact 9 side in response to the current and contacts the fixed contact 9. As a result, the starter motor 2 is energized from the power source 1 via the key switch 3, the movable contact 11 and the fixed contact 9 to start the engine.

In this second embodiment as well, the same safety relay 7 as in the first embodiment is used, but in this case, the fixed contact 9 is used instead of the fixed contact 8 of the first embodiment. The cord 8a in 5 is not connected to the starting electric motor 2, but the cord 9a is connected to the starting electric motor 2. As described above, the safety relay 7 includes the fixed contact 8 with which the movable contact 11 makes contact when the coil 12 is not excited and the fixed contact 9 with which the movable contact 11 makes contact when the coil 12 is excited. There is an advantage that it can be shared by a vehicle using a normally closed switch as the wear detection switch 6 and a vehicle using a normally open switch.

[0039]

As described above, in the seatbelt wearing confirmation device of the present invention, when the seatbelt is not worn, the movable contact and the fixed contact are in a non-contact state, that is, between the key switch and the starting mechanism, in other words, in other words. For example, the engine cannot be started because the power supply and the starting mechanism are cut off. At this time, the warning light is turned on to notify the driver that the seat belt is not worn. Therefore, it is possible to reduce the possibility that the engine is started without wearing the seat belt, the driving is started, and a driver or other occupant is seriously injured in the event of an accident.

If the wearing detection switch is a normally closed switch which is closed when the seat belt is not worn, the warning detection lamp is opened by opening the wearing detection switch when the seat belt is worn. Since the lights are turned off at the same time, the circuit configuration can be simplified.

The safety relay of the present invention is preferably used when constructing the seatbelt wearing confirmation device, and the first and second fixed contacts, the fixed contact, the coil and the diode are single. Since it is housed in the case and only the connecting cords are pulled out of the case, it is convenient to handle. That is, as long as it is not only easy to assemble to the vehicle body at the manufacturing stage of the vehicle but also can be replaced unit by unit, and the vehicle body side is equipped with the wear detection switch and the warning light in advance, the existing There is an advantage that the seatbelt wearing confirmation device of the present invention can be configured by simply attaching the safety relay to a vehicle.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram showing a seatbelt wearing confirmation device according to a first embodiment of the present invention.

FIG. 2 is a circuit configuration diagram of the seat belt wearing confirmation device showing a state in which a key switch is closed when the seat belt is not worn.

FIG. 3 is a circuit configuration diagram of the seat belt wearing confirmation device when the seat belt is worn.

FIG. 4 is an explanatory view showing an internal structure of a safety relay incorporated in the seatbelt wearing confirmation device.

FIG. 5 is a perspective view of the safety relay.

FIG. 6 is a circuit configuration diagram showing a seat belt wearing confirmation device according to a second embodiment of the present invention.

FIG. 7 is a circuit configuration diagram of the seatbelt wearing confirmation device according to the second embodiment when the seatbelt is worn.

FIG. 8 is a circuit configuration diagram of the seat belt wearing confirmation device according to the second embodiment, showing a state in which a key switch is closed when the seat belt is worn.

[Explanation of symbols]

 1 Power Supply 2 Starting Motor (Starting Mechanism) 3 Key Switch 5 Warning Light 6 Wear Detection Switch 7 Safety Relays 8, 9 Fixed Contact 8a, 9a, 11a Code 11 Moving Contact 12 Coil 13 Diode 15 Case

Claims (3)

[Claims] 1. A power source, a starting mechanism for starting an engine of a vehicle with a voltage from the power source, a power source and the starting mechanism which are arranged between the power source and the starting mechanism, and which are provided only when the engine is started. Key switch to connect
A warning light that is connected to the power source and lights up when the seat belt is not worn, and a wear detection switch that opens and closes depending on whether or not the seat belt is worn, and the engine of the engine only when the seat belt is worn In a seatbelt wearing confirmation device configured to allow a start, in a movable contact and a fixed contact arranged in series between the key switch and the starting mechanism, and one end of the movable contact and the fixed contact with the power source in the key switch. A coil that is connected to a terminal on the opposite side of the connection terminal and moves the movable contact between a contact position and a non-contact position with the fixed contact according to the presence or absence of energization; A diode to which the terminal is connected, and the downstream side terminal of this diode is connected to the ground through the wear detection switch, The terminal on the side opposite to the connection terminal with the power supply is connected between the downstream side terminal of the diode and the wear detection switch, and when the wear detection of the seat belt is detected by the wear detection switch, the movable contact is the fixed contact. A seatbelt wearing confirmation device, characterized in that the seatbelt wearing confirmation device is configured to contact the key switch and the starting mechanism. 2. The wear detection switch is a normally closed switch that is closed when the seat belt is not worn, and the movable contact moves to a non-contact position with the fixed contact when the coil is energized. The seatbelt wearing confirmation device according to claim 1. 3. A first and a second fixed contact arranged at a predetermined interval, a movable contact that selectively contacts either the first or the second fixed contact, and one end of which is the movable contact. A coil, which is connected and moves the movable contact between the first and second fixed contacts, and a diode whose upstream terminal is connected to the other end of the coil are housed in a case, and the first And cords for connection are respectively pulled out from the case from the second fixed contact, the movable contact, and the downstream side terminal of the diode,
The movable contact, the coil and the diode are used as the movable contact, the coil and the diode according to claim 1 or 2, and either the first or the second fixed contact is used as the fixed contact according to the claim 1 or 2. Safety relay for seatbelt wearing confirmation device, which is characterized.