JPH0788154B2 - Vehicle's passive belt device - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a seat belt tightening / releasing means in a loosening operation state in association with opening of a door, and a seat belt tightening / releasing operation state in association with door closing. And a passive belt device for a vehicle.

(Prior Art and its Problems) A conventional passive belt device for a vehicle of this type is configured such that the seat belt is simply tightened when the door is closed and the seat belt is loosened when the door is opened.

However, the conventional example having such a configuration has the following problems.

That is, if the door unexpectedly opens due to an impact caused by oneself while running, the seat belt is loosened in conjunction with this and the passenger may be thrown out of the vehicle through the opened door.

Further, even if the accident does not occur, there is a similar risk when the door is accidentally opened while the passenger is inadvertently traveling.

(Object of the Invention) The present invention has been made in view of the above circumstances, and an object thereof is to prevent the risk of the seat belt loosening even if the door unexpectedly opens during traveling due to an accident or carelessness. To do.

(Structure and Effect of the Invention) [Structure] In order to achieve such an object, the present invention has the following structure.

That is, the passive belt device for a vehicle according to the present invention is a vehicle in which the seat belt tightening / loosening means is loosened in an operating state in association with opening the door, and the seat belt tightening / loosening means is in a tight operating state in synchronization with the door closing. In the passive belt device, the vehicle running means and the tightening operation state of the seat belt tightening / releasing means are enabled only when the ignition switch is turned on, and the door running of the door is detected based on the detection signal input from the vehicle running detecting means. The tightening operation by the seat belt tightening / releasing means is maintained regardless of the open / closed state,
Further, there is provided a seatbelt tightening / loosening operation control means for loosening the seatbelt tightening / loosening means into an operating state by turning off the ignition switch.

〔effect〕

According to the present invention having this configuration, the following effects are exhibited.

That is, when the vehicle is running, the detection signal from the vehicle running detection means is output, so that the tightening operation holding means is operating. Therefore, even if the door unexpectedly opens during traveling due to an accident or carelessness, the seat belt can be prevented from loosening, and the passenger can be safely protected from the danger that the passenger is thrown out of the vehicle through the opened door. .

Also, since the seat belt tightening operation is performed only when the ignition switch is turned on, the tightening operation is not performed even if the door is closed when the driver sits in the seat and the ignition switch is not turned on. It is excellent in performance and avoids wasteful consumption of battery power.

Further, since the seat belt is loosened when the ignition switch is turned off at the time of getting off the vehicle, there is an advantage that the getting on and off of the vehicle can always be performed without any inconvenience.

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

Configuration FIG. 1 is a schematic configuration diagram of a passive belt device for a vehicle according to an embodiment of the present invention.

In FIG. 1, 1 is a seat, 2 is a handle, 3 is an ignition switch, 4 is a shift mechanism, and 5 is a door switch. This door switch 5 is ON when the door is open
However, it is configured to turn off in the closed state.

6 is a seat belt, and 7 is a winding mechanism for the seat belt 6. The seat belt retractor 7 is located on one side of the seat 1 and constantly applies tension in the direction in which the seat belt 6 is retracted.

Reference numeral 8 denotes a guide rail provided on the body of the vehicle at a position facing the upper edge of the door glass, and one end of the seat belt 6 is connected to a guide body 9 guided by the guide rail 8. The guide rail 8 is provided with a wire 10 such as a wire.
The guide body 9 is connected to.

One end of the cord 10 is wound around a pulley of a forward / reverse rotation type motor 11, and the other end is connected to a cord winding mechanism 12.
The cord winding mechanism 12 constantly applies tension in the direction in which the cord 10 is wound.

Reference numeral 13 denotes a normally closed front end limit switch, which is arranged at the front end of the guide rail 8 and is turned off when the guide body 9 comes into contact with the guide rail 1.
Reference numeral 4 denotes a normally closed rear end limit switch which is arranged at the rear end of the guide rail 8 and is turned off when the guide body 9 abuts.

FIG. 2 is a circuit diagram of a control circuit in the passive belt device.

In FIG. 2, B is a DC power source such as a battery, and 15
Is a shift switch provided in the shift mechanism 4,
When the shift mechanism 4 is an automatic type, the shift switch 15 is provided when it is in the P range (parking range) or the N range (neutral range).
It turns on, and turns off when it is in any other range. Further, in the case of the gear shift type, it is turned on only when it is in the neutral position, and it is turned off otherwise.

R ₁ is a resistor, R _{2 to} R ₅ are resistors for pull-up, A ₁ and A ₂ are positive logic AND gates, A ₃ is negative logic AND gate, NOR ₁ is negative logic NOR gate, I ₁ is an inverter.

Tr ₁ and Tr ₂ are switching transistors, and Ry ₁ and Ry ₂ are relay coils.

The above elements are connected as shown in FIG.

ry ₁ and ry ₂ are relay contacts that are switched by exciting and demagnetizing the relay coils Ry ₁ and Ry ₂ , respectively. Both relay contacts ry ₁ ,
The motor 11 is connected between ry ₂ .

When a current in the X direction flows through the motor 11, the motor 11 rotates in the normal direction to move the rope 10 backward against the tension of the rope winding mechanism 12, tighten the seat belt 6, and
When a current flows in the Y direction, the motor 11 reversely rotates, the tension of the cord winding mechanism 12 moves the cord 10 forward, and the seat belt 6 is loosened.

In FIG. 2, a portion AA surrounded by a chain line and the seat belt retractor 7, guide rail 8, guide body 9, in FIG.
The entire rope 10 and the rope winding mechanism 12 correspond to the seat belt tightening / releasing means in the constitution of the invention. AA ₁ corresponds to the seat belt fastening / loosening operation control means in the configuration of the invention.

Further, a portion BB surrounded by a chain line corresponds to the vehicle running detection means in the configuration of the invention.

Operation Next, the operation of this embodiment will be described based on the time chart of FIG.

At time t ₁ , the door is closed and the seat belt 6
Is loose. In this state, since the door switch 5 is off, the signal lines a ₃ and e ₂ are at "H" level. Further, since the seat belt 6 is loose and the front end limit switch 13 is OFF, the signal line c ₂ is at “H” level. On the other hand, since the rear end limit switch 14 is in the ON state, the signal line d is at "L" level, which is inverted by the inverter I ₁ and the signal line a ₂ is at "H" level.

Furthermore, since the ignition switch 3 is off,
Since the signal lines a ₁ , b ₁ , e ₁ are at the “L” level and the shift mechanism 4 is in the P range or the N range,
The shift switch 15 is ON, and the signal line b ₂ is at “L” level.

As described above, the signal lines a ₁ , a ₂ and a ₃ are at the “L” level,
Since it is at "H" level and "H" level, the AND gate A ₁ is not conductive, the signal line f is at "L" level, and the transistor Tr ₁ is also off. Therefore, the relay coil Ry ₁ is not excited and the relay contact ry ₁ is on the terminal r ₀ side.

On the other hand, since the signal lines b ₁ and b ₂ are both at the “L” level as described above, the AND gate A ₂ does not conduct and the signal line c ₁
Is at "L" level. Since the signal lines e ₁ and e ₂ are at “L” level and “H” level, respectively, the AND gate A ₃
Does not conduct, and the signal line c ₃ is at “L” level. Since the signal lines c ₁ , c ₂ and c ₃ are at “L” level, “H” level and “L” level, respectively, the NOR gate NOR ₁ does not conduct and the signal line g is at “L” level, Transistor Tr ₂ is off. Therefore, the relay coil Ry ₂ is not excited and the relay contact ry ₂ is the terminal s ₀ .

Therefore, no current flows through the motor 11, and the seat belt 6 is in the maximum loosened state.

When the door is opened at time t ₂ for boarding, the door switch 5 is turned on, and the signal lines a ₃ and e ₂ are set to the “L” level, but other signal lines are in the same state as Since the OFF states of the transistors Tr ₁ and Tr ₂ are unchanged and the states of the terminals r ₀ and s ₀ are also unchanged, the motor 11 continues to be in the stopped state.

When the door is closed at time t ₃ , the state returns to and the motor 11 remains stopped.

Then for engine starting, an ignition switch 3 when turned ON at time t _4, the signal lines a _1, b
₁ and e ₁ go to “H” level. As a result of the signal line a ₁ becoming “H” level, the AND gate A ₁ becomes conductive and the signal line f becomes “H”.
Since it becomes the level, the transistor Tr ₁ turns on. As a result, the relay coil Ry ₁ is excited and the relay contact ry ₁ becomes the terminal.
r Switch to ₁ side.

On the other hand, even if the signal line b ₁ goes to the “H” level, the shift switch 15 is ON, so the signal line b ₂ is at the “L” level, and therefore the non-conducting state of the AND gate A ₂ is unchanged. , The signal line c ₁ maintains the “L” level. Also, the signal line e ₁
If There becomes "H" level, since the door switch 5 is the signal line e ₂ is OFF is in "H" level, and conducts AND gates A _3, the signal lines c ₃ becomes "H" level. That is, since the signal lines c ₁ , c ₂ and c ₃ are at “L” level, “H” level and “H” level, respectively, the NOR gate NOR ₁ remains non-conducting,
The state where the relay contact ry ₂ is on the terminal s ₀ side is unchanged.

Therefore, a current in the tightening direction X flows through the motor 11, and the motor 11 rotates in the normal direction against the tension of the cord winding mechanism 12 to start the backward movement of the cord 10. That is, the seat belt 6
Tightening operation is started.

Then, at time t ₅ , the guide body 9 separates from the front end limit switch 13 and the front end limit switch 13 is turned on, so that the signal line c ₂ becomes “L” level.
Since c ₃ is at the “H” level, the output state of the NOR gate NOR ₁ is unchanged and the forward rotation of the motor 11 continues.

At time t ₆ , the guide body 9 is the rear end limit switch.
When abutting against 14 and turning off the rear end limit switch 14, the signal line d becomes "H" level, which is inverted by the inverter I ₁ and the signal line a ₂ becomes "L" level.
The gate A ₁ is turned off, and the signal line f becomes "L" level.
As a result, the transistor Tr ₁ turns off and the relay coil Ry ₁
Is demagnetized and the relay contact ry ₁ is switched to the terminal r ₀ side, so that no current flows in the motor 11 and the motor 11 stops.

That is, the seat belt 6 is tightened to the maximum tightened state until the guide body 9 contacts the rear end limit switch 14,
Fix the human body.

It is assumed that the door is opened at time t _{7 for} some reason. Then, the door switch 5 is turned on, and the signal lines a ₃ and e ₂ are set to the “L” level. Thus, the AND gate A ₃ becomes non-conductive, the signal lines c ₃ becomes "L" level. Further, since the signal lines c ₁ and c ₂ are also at “L” level, the NOR gate NOR ₁ becomes conductive and the signal line g becomes “H” level.

As a result, the transistor Tr ₂ is turned on and the relay coil Ry ₂ is excited, so that the relay contact ry ₂ is switched to the terminal s ₁ side.

On the other hand, the output state of the AND gate A ₁ does not change even when the signal line a ₃ becomes “L” level, and the relay contact ry ₁ is connected to the terminal r _0.
The state on the side is also unchanged.

Therefore, a current in the loosening direction Y flows through the motor 11 and the motor 11
Rotates in reverse. Then, the tension of the cord winding mechanism 12 starts the forward movement of the cord 10. That is, the loosening operation of the seat belt 6 is started.

Then, at time t ₈ , the guide body 9 separates from the rear end limit switch 14 and the rear end limit switch 14 is turned on, so that the signal line d becomes “L” level, which is inverted by the inverter I ₁ to generate the signal line a. _{Although 2} becomes "H" level, the output state of the AND gate A ₁ is unchanged and the reverse rotation of the motor 11 continues.

At time t ₉ , the guide body 9 is the front end limit switch.
When the front end limit switch 13 is turned off by abutting on 13, the signal line c ₂ becomes “H” level. Therefore, NOR gate N
OR ₁ becomes non-conductive, and the signal line g becomes "L" level. As a result, the transistor Tr ₂ turns off and the relay coil
Since Ry ₂ is demagnetized, the relay contact ry ₂ is switched to the terminal s ₀ side, so that no current flows in the motor 11 and the motor 11 stops.

That is, the seat belt 6 is loosened to the maximum loosened state until the guide body 9 contacts the front end limit switch 13.

Door switch 5 turns off when the door closes at time t _10.
Therefore, the signal lines a ₃ and e ₂ are at the “H” level. At this time, since the signal lines a ₁ and a ₂ are at the “H” level, the AND gate A ₁ is conductive and the transistor Tr ₁ is turned on, so that the relay coil Ry ₁ is excited and the relay contact ry ₁ Is switched to the terminal r ₁ side.

The signal lines e ₁ and e ₂ are both at the “H” level, and the signal line c ₃ is at the “H” level. This means that the NOR gate NOR ₁
Does not change, and the OFF state of the transistor Tr ₂ is maintained.

As a result, a current in the tightening direction X flows through the motor 11, and the tightening operation of the seat belt 6 is started.

At time t ₁₁ , the guide body 9 is separated from the front end limit switch 13, and the front end limit switch 13 is turned on.
Although the signal line d ₁ is at “L” level, the output state of the NOR gate NOR ₁ is unchanged because the signal line c ₃ is at “H” level, and the normal rotation of the motor 11 continues.

At time t ₁₂ , the guide body 9 comes into contact with the rear end limit switch 14 and turns off the rear end limit switch 14,
The signal line d goes to “H” level, the transistor Tr ₁ turns off and the relay contact ry ₁ goes to the terminal r in the same way as above.
Since it is switched to the ₀ side, no current flows in the motor 11 and the motor 11 stops.

That is, the seat belt 6 is tightened to the maximum tightened state until the guide body 9 contacts the rear end limit switch 14.

At time t ₁₃ , the shift mechanism 4 is set to start traveling.
Is operated to a position other than the P range and the N range and the shift switch 15 is turned off, the signal line b ₂ becomes "H" level. Since the signal line b ₁ is at “H” level because the ignition switch 3 is on,
The D gate A ₂ is turned on, and the signal line c ₁ is held at “H” level. Therefore, no matter how the levels of the signal lines c ₂ and c ₃ change, the NOR gate NOR ₁ is held in a non-conducting state and the transistor Tr ₂ is OFF, so the relay contact ry ₂ is connected to the terminal s ₀ side. Is kept in a closed state.

That is, when the ignition switch 3 is ON and the shift mechanism 4 is in a position other than the P range and the N range, the vehicle is in a running state.
In this case, even if a current in the fastening direction X of the seat belt 6 may flow, a current in the loosening direction Y is prohibited from flowing.

The impact due to an accident during traveling, or inadvertently occupant, at time t _14, when the doors of the vehicle during running is opened unexpectedly, next door switch 5 is turned ON, the signal lines a _3, e ₂ " It becomes L "level. But AND gate
A ₁ maintains the non-conductive state, and the relay contact ry ₁ maintains the state of being connected to the terminal r ₀ . Further, the AND gate A ₂ also maintains the non-conductive state, and the relay contact ry ₂ holds the state connected to the terminal s ₀ .

Therefore, the seat belt 6 is kept in its maximum tightening operation state, and even if the door is unexpectedly opened, the passenger is kept fixed to the seat 1 to protect the passenger from the risk of being thrown out of the vehicle. , Ensure safety.

If the opening of the door during traveling is inadvertent by the passenger, the vehicle continues to travel. Then, at time t _15, when closing the door, the door switch 5 is OFF, the flow returns to the original state. That is, the seat belt 6 continues to be held in the maximum tightening operation state.

When the vehicle is stopped and the ignition switch 3 is turned off at time t ₁₆ , the signal lines a ₁ , b ₁ , e ₁ are set to the “L” level.

The AND gate A ₁ maintains the non-conductive state because the signal line a ₁ is at “L” level. That is, the relay contact
The state in which ry ₁ is on the terminal r ₀ side is also unchanged.

The NOR gate NOR ₁ is switched from the non-conducting state to the conducting state. That is, since the signal line b ₁ is at “L” level, the AND gate A ₂ is non-conductive and the signal line c ₁ is at “L” level.
It becomes a level. Since the seat belt 6 is in the maximum tightening operation state and the front end limit switch 13 is ON, the signal line c ₂ is also at “L” level. Since the door is closed and the door switch 5 is off, the signal line e ₂ is at “H” level. Since the signal line e ₁ becomes “L” level, the AND gate A ₃ becomes non-conductive, and the signal line c ₃ also becomes “L” level.

As a result, each of the signal lines c ₁ , c ₂ and c ₃ becomes the “L” level, the NOR gate NOR ₁ becomes conductive, and the signal line g becomes “H”.
Level, transistor Tr ₂ turns on, relay coil R
To excite y ₂ , relay contact ry ₂ is switched to the terminal s ₁ side.

Therefore, a current in the loosening direction Y flows through the motor 11 and the motor 11
Reversely rotates, and the loosening operation of the seat belt 6 is started.

Then, at time t ₁₇ , the guide body 9 separates from the rear end limit switch 14 and the rear end limit switch 14 is turned on, but the output state of the NOR gate NOR ₁ is unchanged and the motor 1
Reverse rotation of 1 continues.

At time t ₁₈ , the guide body 9 comes into contact with the front end limit switch 13 and turns off the front end limit switch 13,
The signal line c ₂ becomes “H” level. Therefore, the NOR gate NOR ₁ becomes non-conductive. As a result, transistor Tr ₂
FF is turned on and the relay coil Ry ₂ is demagnetized, so the relay contact r
Since y ₂ is switched to the terminal s ₀ side, no current flows in the motor 11, and the motor 11 stops.

That is, the seat belt 6 is loosened to the maximum loosened state until the guide body 9 contacts the front end limit switch 13.

At time t ₁₉ , the door is opened and the door switch 5 is turned on.
Even if N, the signal line a ₃ is at “L” level, so the transistor Tr ₁ is OFF. Also, the front end limit switch
Since 13 is OFF and the signal line c ₂ is at “H” level, the NOR gate NOR ₁ is non-conductive and the transistor Tr ₂ is also OFF. That is, the maximum loosened state of the seat 6 is maintained.

At time t ₂₀ , even if the shift mechanism 4 is operated to the position of P range or N range and the shift switch 15 is turned on, the signal line a ₁ is at “L” level because the ignition switch 3 is turned off. Therefore, the AND gate A ₁ maintains the non-conducting state. Also, the front end limit switch
Since 13 is OFF, the signal line c ₂ is at “H” level, and the NOR gate NOR ₁ also maintains the non-conductive state. That is, the OFF state of the transistors Tr ₁ and Tr ₂ is maintained, and the maximum loosened state of the seat belt 6 is maintained.

At time t ₂₁ , the door is closed and the door switch 5
Even if the switch is turned off, the above-mentioned state does not change, and the maximum loosened state of the seat belt 6 is maintained.

The present invention also includes embodiments having the following configurations.

(I) A cable 10 wound endlessly between the pulley of the motor 11 and the pulley at the front end of the guide rail 8. In this case, the rope winding mechanism 12 can be omitted.

(II) In the above embodiment, the seat belt 6 of the driver's seat is used, but the present invention may be applied to a seat belt of an auxiliary seat or a seat belt of a rear seat.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a passive belt device for a vehicle according to an embodiment of the present invention, FIG. 2 is a circuit diagram of a control circuit in the passive belt device, and FIG. 3 is a time chart thereof. 3 ... Ignition switch 5 ... Door switch 6 ... Seat belt 7 ... Seat belt retracting mechanism (seat belt tightening / loosening means) 8 ... Guide rail (seat belt tightening / loosening means) 9 ... Guide body (seat belt) Tightening / loosening means 10 …… Rope (seat belt tightening / loosening means) 11 …… Motor (seat belt tightening / loosening means) 15 …… Shift switch BB …… Vehicle running detection means AA ₁ …… Tightening operation holding means

Claims (1)

[Claims] Claim: What is claimed is: 1. A passive belt device for a vehicle, wherein a seat belt tightening / loosening means is loosened in an operating state in association with door opening, and a seat belt tightening / loosening means is in a tight operating state in conjunction with door closing. The detecting means and the tightening operation state of the seat belt tightening / releasing means are enabled only when the ignition switch is ON, and the seat is irrespective of the open / closed state of the door based on the detection signal input from the vehicle running detection means. Passive belt device for a vehicle, which holds the tightening operation by the belt tightening / releasing means, and includes a seat belt tightening / loosening operation control means for loosing the seat belt tightening / loosening means by turning off the ignition switch. .