JPH0773989B2 - 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) As a conventional passive belt device for this kind of vehicle, when the key is inserted into the cylinder of the ignition switch with the door closed and the key is operated to a position other than OFF, the seat belt tightens, The seat belt was designed to loosen when the door was opened.

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

That is, if you get tired while driving, you often stop the car and listen to the car stereo or radio with the key as an accessory position, but in that case the key is not turned off, so the seat belt is in a tightened state. However, there was a problem that I could not relax.

(Object of the Invention) The present invention has been made in view of the above circumstances, and is sufficient for listening to a car stereo or a radio by allowing the seat belt to be loosened by setting the key to the accessory position. The purpose is to be able to listen to in a relaxed state.

(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, means for detecting that the ignition switch is in the accessory position, and tightening operation canceling means for canceling the tightening operation of the seat belt tightening / loosening means based on the input of the detection signal from the accessory position detecting means. It is equipped with.

[Operation] The operation of this configuration is as follows.

When the ignition switch is operated to the accessory position in the seatbelt tightening state, the tightening operation of the seatbelt tightening / releasing means is released by the input of the detection signal from the accessory position detecting means, and the seatbelt is loosened.

[Effect] From the above, according to the present invention, the following effects are exhibited.

When the car is stopped and the key is in the accessory position, the seat belt is automatically loosened, which allows you to listen to the car stereo or radio in a relaxed state without the hassle of loosening the seat belt. It is possible to realize a richer car life.

(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. Ignition switch 3 is off position OFF,
It is possible to switch to four positions: accessory position ACC, on position ON, and start position ST. 15 is accessory position ACC and on position O
A terminal common to N and 16 is a terminal common to ON position ON and start position ST.

R ₁ and R ₂ are resistors, R _{3 to} R ₅ are pull-up resistors, A ₁ and A ₂
Is an AND gate, NA ₁ is a positive logic NAND gate, NA ₂ is a negative logic NAND gate, and I _{1 to} I ₄ are inverters.

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.

Further, the DC power supply B, the terminal 15 having the accessory position ACC, and the resistor R ₁ correspond to the accessory position detecting means in the constitution of the invention, and the NAND gates NA ₁ and NA _{2 function} as the tightening operation prohibiting means in the constitution of the invention. Equivalent to.

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

[1] When the off position is OFF At time t ₁ , the door is closed and the seat belt 6 is tightened. In this state, the door switch 5 is OFF, the signal line b ₂ is "H" level. Further, since the ignition switch 3 is in the off position OFF, the signal line a ₁ is at “L” level, the signal line a ₂ is at “H” level, the NAND gate NA ₁ is conductive, and the signal line b ₁ is also at “H” level. "It is a level. Therefore, NAND gate NA
₂ is non-conductive, the signal line c ₂ is at “H” level, and the signal line d ₂ is at “L” level.

Further, since the seat belt 6 is fastened and the rear end limit switch 14 is OFF, the input terminal of the inverter I ₂ is at “H” level and the signal line c ₁ is at “L” level.
Therefore, AND gate A ₁ is non-conductive and transistor Tr ₁
Is OFF. That is, 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 front end limit switch 13 is in the ON state, the input terminal of the inverter I ₃ is at “L” level and the signal line
d ₁ is at "H" level. Signal line as above
Since d ₂ is at “L” level, transistor Tr ₂ is also off. Therefore, the relay coil Ry ₂ is not excited and the relay contact ry ₂ is on the terminal s ₀ side.

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

When the door is opened at time t ₂ for boarding, the door switch 5 is turned on, so that the signal line b ₂ becomes “L” level, the NAND gate NA ₂ becomes conductive, and the signal line d ₂ becomes “H”. It becomes a level. At this time, since the signal line d ₁ is also at “H” level, the transistor Tr ₂ becomes conductive, and as a result, the relay coil Ry ₂ is excited and the relay contact ry ₂ is switched to the terminal s ₁ side.

At this time, since the relay contact ry ₁ is on the terminal r ₀ side, a current in the loosening direction Y flows through the motor 11 and the motor 11 rotates in the reverse direction. Then, the tension of the cord winding mechanism 12 causes the cord to
10 forward movements are started. That is, the loosening operation of the seat belt 6 is started.

At time t ₃ , the guide body 9 moves to the rear end limit switch 14
Since the rear end limit switch 14 is turned on, the signal line c ₁ is at “H” level, but the signal line c ₂ is at “L” level, and the AND gate A ₁ is not conducting. To maintain. Therefore, the reverse rotation of the motor 11 continues.

At time t ₄ , the guide body 9 moves the front end limit switch 13
Then, when the front end limit switch 13 is turned off, the signal line d ₁ becomes “L” level. As a result, the transistor
Since the Tr ₂ is turned off and the relay coil Ry ₂ is demagnetized, the relay contact ry ₂ is switched to the terminal s ₀ side.
No current flows through 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.

When the door at time t ₅ is closed, since the door switch 5 is OFF, the signal line b ₂ becomes "H" level. At this time, since the signal line b ₁ is at “H” level, the NAND gate
NA ₂ becomes non-conductive, and the signal line c ₂ becomes “H” level. At this time, since the rear end limit switch 14 is ON, the signal line b ₂ is also at “H” level. As a result, the AND gate A ₁ becomes conductive and the transistor Tr ₁ is turned on, so that the relay coil Ry ₁ is excited and the relay contact ry ₁ becomes the terminal.
r Switch to ₁ side.

Therefore, at the moment when the door switch 5 is turned off, a current in the tightening direction X flows through the motor 11, the motor 11 rotates normally against the tension of the cord winding mechanism 12, and the tightening operation of the seat belt 6 starts. To be done.

At time t ₆ , the guide body 9 moves to the front end limit switch 13
The signal line d ₁ goes to “H” level because the front end limit switch 13 is turned on, but the output state of the AND gate A ₂ is unchanged because the signal line d ₂ is at “L” level. The forward rotation of 11 continues.

At time t ₇ , the guide body 9 moves to the rear end limit switch 14
When the rear end limit switch 14 is turned off, the signal line C ₁ goes to the “L” level, and as a result, the transistor
Since Tr ₁ is turned off and the relay contact ry ₁ is switched to the terminal r ₀ side, current stops flowing 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.

Switching the ignition switch 3 to the accessory position ACC at time t ₈ when the [2] accessory position ACC, since the signal lines a _1, a ₂ is based on the "H" level, NAND gate NA ₁ becomes non-conductive , The signal line b ₁ becomes “L” level.

At this time, the door is closed and the door switch 5 is off, so the signal line b ₂ is at the “H” level. Therefore, the NAND gate NA ₂ becomes conductive, the signal line c ₂ becomes “L” level, and the signal line d ₂ becomes “H” level.

Further, since the seat belt 6 is fastened and the rear end limit switch 14 is OFF, the signal line c ₁ is at “L” level. Therefore, the AND gate A ₁ is non-conductive, and the transistor Tr ₁ is OFF. That is, 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 front end limit switch 13 is in the ON state,
Signal line d ₁ is in the "H" level. As described above, since the signal line d ₂ becomes “H” level, AND gate A ₂
Is turned on, and the transistor Tr ₂ is turned on. As a result, the relay coil Ry ₂ is excited and the relay contact ry ₂ is switched to the terminal s ₁ side.

Therefore, the current in the loosening direction Y flows through the motor 11, and the motor 11
11 rotates in the reverse direction to start the forward movement of the cord 10. That is,
Ignition switch 3 in accessory position ACC
From the moment of switching to, the loosening operation of the seat belt 6 is started.

At time t ₉ , the guide body 9 moves to the rear end limit switch 14
Since the rear end limit switch 14 is turned on, the signal line c ₁ is at “H” level, but since the signal line c ₂ is at “L” level, the AND gate A ₁ remains non-conductive. To do. Therefore, the reverse rotation of the motor 11 continues.

At time t ₁₀ , the guide body 9 moves to the front end limit switch 1
When contacting 3 and turning off the front end limit switch 13, the signal line d ₁ becomes “L” level. As a result, the transistor
Since the Tr ₂ is turned off and the relay coil Ry ₂ is demagnetized, the relay contact ry ₂ is switched to the terminal s ₀ side.
No current flows through 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 _11, when opening the door, because the door switch 5 turns ON, the the signal line b ₂ becomes "L" level,
The conduction state of the NAND gate NA ₂ is unchanged, and the signal line d ₂ maintains the “H” level. However, at this time, since the front end limit switch 13 is OFF, the signal line d ₁ is at “L” level, so that the AND gate A ₂ is non-conductive and the transistor Tr ₂ is OFF.

On the other hand, since the NAND gate NA ₂ is kept conductive, the signal line c ₂ is kept at the “L” level.
The non-conductive state of the D gate A ₁ and the OFF state of the transistor Tr ₁ are also maintained.

That is, the motor 11 remains stopped and the seat belt 6
Is maintained in its maximum relaxed state.

At time t ₁₂ , when the door is closed, the door switch 5 is turned off, and the signal line b ₂ is at “H” level. However, since the signal line b ₁ is at “L” level, the NAND gate is
The conduction state of NA ₂ is maintained. Therefore, as in the case described above, the OFF state of the transistors Tr ₁ and Tr ₂ is maintained. That is, the motor 11 remains stopped, and the seat belt 6 is maintained in its maximum loosened state.

[3] When the on position is ON When the ignition switch 3 is switched to the ON position at time t ₁₃ , the signal lines a ₁ and a ₂ are set to the “H” level and the “L” level, respectively, and the NAND gate NA ₁ becomes conductive. Then, the signal line b ₁ becomes “H” level.

At this time, since the door is closed, the seat belt 6 is tightened in the same manner as in the off position OFF of [1].

Front limit switch 13 at time t _14, but is ON, the state of the transistor Tr _1, Tr ₂ are immutable, forward rotation of the motor 11 is continued. The rear end limit switch 14 is turned off at time t _15.
And the motor 11 stops.

When the ignition switch 3 is in the ON position ON, as in the case of the OFF position OFF in [1], the seat belt 6 is loosened in conjunction with the opening of the door and is interlocked with the closing of the door. Tightens.

[4] At the start position ST Even when the ignition switch 3 is at the start position ST, as in the case of the on position ON of [3],
The seat belt 6 loosens in conjunction with the opening of the door, and the seat belt 6 tightens in conjunction with the closing of the door.

Another Example Next, another example of the present invention will be described.

In the above embodiment, in the state where the door is closed, the seat belt 6 is tightened when the ignition switch 3 is in the off position OFF, the seat belt 6 is loosened when in the accessory position ACC, and the seat belt 6 is in the start position ST. 6 tightens. Therefore,
Turn the ignition switch 3 from the OFF position to the accessory position ACC → start position ST
When operated to, the seat belt 6 causes an unstable motion of [tightening → loosening → tightening].

This embodiment eliminates such inconvenience.

This configuration has an ON delay timer as a delay means having a delay time of about 15 to 30 seconds between the NAND gate NA ₁ and the NAND gate NA ₂ as shown by the chain line in FIG.
The DT is inserted.

The operation of this embodiment is as follows.

That is, when the ignition switch 3 reaches the accessory position ACC, the ON delay timer DT delays the inversion of the signal line b ₁ from the “H” level to the “L” level.

Therefore, turn the ignition switch 3 to the off position OF.
When operating from F to the accessory position ACC → start position ST all at once, the signal line b ₁ remains in the “H” level state, and the operation of loosening the seat belt 6 does not occur. That is, the unstable movement of the seat belt 6 [tightening → loosening → tightening] is prevented, and the seat belt 6 can be maintained in the tightening operation state.

It should be noted that the present invention also includes, as an example, a structure in which the cord 10 is endless and is wound 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.

Further, the present invention can be applied to a seat belt for an auxiliary seat, a seat belt for a driver's seat, and a seat belt for 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 …… Seatbelt 7 …… Seatbelt winding mechanism 8 …… Guide rail 9 …… Guide body 10 …… Rope 11 …… Motor ACC …… Accessory position NA ₁ , NA ₂ ...... NAND gate

Claims (1)

[Claims] Claim: What is claimed is: 1. An ignition switch for a passive belt device for a vehicle, wherein a seatbelt tightening / loosening means is loosened to be in an operating state in association with opening a door, and the seatbelt tightening / loosening means is in a tightly operating state in association with closing a door. Is in the accessory position, and a tightening operation canceling means for canceling the tightening operation of the seat belt tightening / loosening means based on the input of the detection signal from the accessory position detecting means. apparatus.