JPH0332958A - Passive seat belt device - Google Patents

Abstract

PURPOSE:To prevent a trouble of releasing the emergency lock function of a belt during the travel of a vehicle with a door unlocked by applying the constitution wherein a solenoid for releasing a belt lock is actuated with a main control part only when both door and door lock switches detect a door open condition. CONSTITUTION:The opening side lower part of a door 50 is fitted with a retractor 21 having an unwinding turn emergency stop function for locking a belt 22 upon detection of the acceleration or deceleration speed of the door 50 and the delivery speed of the belt 22. A belt lock releasing solenoid for releasing the unwinding turn emergency stop function is built into the aforesaid retractor 21. In the afore said passive seat belt device, a door switch 2 for detecting the opening or closing of the door 50 is provided, together with a door lock switch 15 for detecting whether or not the door 50 is locked to a body. In addition, control is so made that the belt releasing solenoid operates only when both switches 2 and 15 detect a door open condition.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a passive seat belt device, and in particular,
The present invention relates to a so-called door-mount type passive seat belt device that automatically opens and restrains an occupant on a seat in response to opening and closing of a vehicle door.

[Conventional technology]

A door-mounted passive seatbelt device that automatically attaches and detaches the belt when the vehicle door is opened and closed makes wearing a seatbelt semi-mandatory without requiring any troublesome operations. , which has the advantage of encouraging seat belt use.

This type of seatbelt device normally wraps the belt end elastically to apply appropriate tension to the belt, and can be easily pulled out when necessary.
Equipped with an emergency stop function (emergency lock function) that detects vehicle acceleration/deceleration and belt withdrawal and locks the belt when sudden acceleration/deceleration occurs in the vehicle such as during a collision or when the belt is suddenly pulled out. A relatively well-known model is one equipped with a tractor at the bottom of the rear open side of the door. In the case of a structure in which the door is equipped with a retractor, there is a risk that the belt may become locked due to the speed with which the belt is pulled out when the door is suddenly opened and the acceleration/deceleration of the door itself when the door is opened/closed. For this reason, for example,
As in the invention described in Japanese Patent Publication No. 57-33186, the above-mentioned emergency locking function is activated only when the door is closed by a door switch installed in the vicinity of the retractor and the lower part of the center pillar of the vehicle. Some retractors release the emergency belt lock function to prevent the belt from locking when the door is opened.This emergency lock function is normally released using a belt lock release solenoid built into the retractor. It will be done.

[Problems to be Solved by the Invention] As the door switch in the above conventional example, a door switch for a room lamp is often used also. However, this door switch has a structure in which when the door is closed, the movable contact opens when the movable contact is pressed against the home position return spring to the opposite side of the fixed contact, i.e., it senses the pressure. Because many structures are used,
When the door is ajar (when the door is ajar), the “ON”
- OFF is unclear (actually, it is often rON). For this reason, the main switch for the room lamp is often turned OFF during the daytime, but in such a case, if you try to drive with the door ajar, there is a risk that the belt lock release solenoid will activate and the emergency belt lock function will be released. There was the disadvantage of gender.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a panossive seat belt device that can overcome the disadvantages of the conventional example and effectively prevent the belt emergency locking function from being released when the door is left ajar.

[Means to solve the problem]

In the present invention, a retractor having an emergency stop function of unwinding rotation that senses the door acceleration/deceleration and belt withdrawal speed and locks the belt is installed at the lower part of the open side of the door, and the fulcrum of the belt is provided on the door side. It has a built-in solenoid for releasing the belt lock that releases the emergency stop function of the unwinding rotation, and the belt is automatically attached and released in response to opening and closing of the door. And on the open side of the door.

A door switch is installed to detect the opening and closing of the door, as well as a latch that locks the door to the vehicle body.

The vehicle is equipped with a door rotor switch that detects whether the door is opened or closed by detecting whether or not the door is locked to the vehicle body. Further, both of these switches are configured to include a main control section that operates the belt lock release solenoid only when the door is sensed to be open. This aims to achieve the above-mentioned purpose.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In this embodiment, as shown in FIG. 3, a belt winding and storing glue tractor 21 is installed at the lower part of the open side of the door 50 of the driver's seat. This retractor 21 usually elastically wraps one end of the belt 22 to apply appropriate tension to the belt 22, and can be easily pulled out as needed, but it is difficult to prevent the vehicle from accelerating or decelerating rapidly, such as during a collision. When this happens and when the belt 22 is pulled out violently! It has an unwinding rotation emergency stop function (emergency belt lock function) that locks the belt 22 by sensing the acceleration/deceleration of the 1i vehicle and the unwinding speed of the belt 22.

One end of the belt 22 was wound around the retractor 21, the other end passed through the connecting through ring 23 shown in FIG. Afterwards, it extends obliquely upward in the figure, passes through the inside of the slip anchor 26, extends downward, and is fixed to the aforementioned connecting through ring 23.

The annular locking member 25 is detachably engaged with a buckle 31 provided on the side of the seat 24 and attached to the vehicle floor. Further, a stopper 27 is provided at a portion of the belt 22 between the connecting through ring 23 and the annular locking member 25. This stopper 27 has a function of bringing the connecting through ring 23 toward the retractor 21 when the door 50 is closed, that is, when the belt 22 is attached.

The slip anchor 26 is attached to a sash bracket 28 fixed to the upper part of the open side of the door 50, and is attached to the belt 2.
The second fulcrum is configured on the door 50 side. The sash bracket 28 fits into a pillar anchor 30 provided on a center pillar 29 of the vehicle when the door 50 is closed, thereby increasing the strength of the attachment of the slip anchor 26. Here, the coefficient of sliding friction between the belt 22 and the annular locking member 25 is set to be larger than the coefficient of friction between the belt 22, the connecting through ring 23, and the slip anchor 3O.

In this embodiment, in this way, one continuous belt 22 reaches from the retractor 21 to the connecting through ring 23.
Accordingly, the lap belt 222A and the shoulder belt part 2
2B, and when the door 50 is opened or closed, the belt 22
Attachment and detachment are automatically performed.

In the explanation up to this point, we have only explained the right side (driver's seat side) of the vehicle6, but in reality, the passenger seat side is also equipped with a seat belt device with the same configuration as above, so we will explain from here on. In the explanation, both will be included.

Next, the configuration and operation of the circuit section constituting the main part of this embodiment will be explained based on FIGS. 1 and 2.

In the following explanation, "driver's seat side" is r
``Dr'', ``rpS'', ``Passenger side (parasenser side)'',
For convenience, r switch j will be abbreviated as rsWJ.

The circuit 20 shown in FIG. 1 includes an ignition SWl,
Dr door lock SW2, Pst' lock SW3,
Dr solenoid SW4, Ps solenoid SW5 and D
The controller 8 includes a handlebar SW6, a Ps handlebar SW7, and a controller 8 as a main control unit to which each of these switches is connected.

Of these, the Dr door lock SW2 is actually installed at a latch part (not shown) that locks the door 50 of the driver's seat example to the vehicle body, as shown in FIG. This is to detect whether the door 50 is opened or closed by detecting whether or not the door 50 is locked to the vehicle body. This Dr door lock SW2 is activated when the door 50 on the driver's seat side is locked to the vehicle body.

That is, when the door 50 is closed, the contact is opened and the door 5
When the 0 is not locked to the vehicle body, the contact is closed. The Ps door lock SW3 is provided at approximately the same position on the passenger seat side and has the same function as the Dr door lock SW2.

The Dr solenoid SW4 constitutes a kind of relay together with the D "cancellation solenoid 9" described later.
When the cancel solenoid 9 is activated, the movable contact is attracted and the contact is opened. Also,
This Dr solenoid SW4 is connected to the output side of an acceleration sensor (not shown) installed in the retractor 21, and turns on and off a circuit that transmits an output signal of the acceleration sensor to the controller 8. In this embodiment, when the output value of the acceleration sensor exceeds a predetermined value, the controller 8 activates a belt emergency locking means (not shown) to perform the above-mentioned emergency stop of the unwinding rotation, thereby stopping the belt 22. An emergency lock is now in place. The Ps solenoid SW5 constitutes a type of relay together with the Dr cancel solenoid 1 described later, and has the same function as the Dr solenoid SW4.

The Dr buckle SW6 is attached to the buckle 31 described above, and its contact is opened when the belt 22 of the driver's seat is attached to the buckle 31.

The structure is such that its contacts close when it is not attached. Depending on whether the Dr buckle SW6 is turned on or off, the controller 8 controls the Dr bevel lamp 1, which will be described later.
2. It is designed to control the lighting/extinguishing of the light.Ps
The buckle SW7 is installed on a buckle on the passenger seat side (not shown) and has the same function as the Dr buckle SW6.

The controller 8 is configured with a built-in microcomputer, etc., and controls the entire circuit.

This controller 8 has a door warning lamp.
l, Dr belt lamp 12. Ps bevel lamp 13. Warning check 5W14 is connected. These lamps and the like are actually installed on the front panel 32 shown in FIG.

Among these, the door warning lamp 11 is a Dr.
Door switch 15. Ps Any of the door switches 16 is r
When ON, it lights up to warn passengers that the door is ajar. Dr bevel lamp 12, Ps bevel lamp 1
3 is the aforementioned Dr buckle SW6. Ps buckle SW
7 is set to rON, the light is lit by the controller 8 to warn the passenger to fasten the seat belt or that the seat belt is not properly attached to the buckle.
This is what we do. Warning check 5W14 is
When the starter signal is input, the contact becomes "ON" and is used to check whether various warning lamps such as the door warning lamp 11 are operating normally.

Furthermore, the controller 8 includes a D cancel solenoid 9, which is installed on the door 50 of the driver's seat example and serves as a belt lock release solenoid that releases the emergency stop function of the unwinding rotation of the tractor 21, and a passenger seat door door (not shown). Ps to release the emergency stop function of the tractor's unwind rotation.
A cancel solenoid IO is also provided. Of these, the Dr cancel solenoid 9 is built into the retractor 21 shown in FIG. 3, and its "operation/non-operation" is controlled by the controller 8. When activated, the contact of the Dr solenoid SW4 described above is opened. Therefore, an output signal from an acceleration sensor (not shown) is no longer transmitted to the controller 8. That is, since the output of the acceleration sensor becomes zero, the controller 8 does not operate the emergency locking means (not shown).

Furthermore, in this embodiment, the Dr cancel solenoid 9. P
s Cancel solenoid 1 with non-return diode 17.1
Drs door 5015Pss door 50 through 8 respectively
16, connected in series. Of these, Drs door 50
15. As shown in FIG. 3, it is installed at the lower part of the open side of the door 50 of the driver's seat example, specifically, at the part of the vehicle body frame that faces the door 50 when the door 50 is closed. This is for detecting opening/closing of 50. This Dr.
s door 5015, avoid the so-called normally closed switch, door 50
When the movable contact is closed, the movable contact is pushed by the door 50 against the return spring to the opposite side from the fixed contact, and the contact is opened. Pss door 5016, equipped at almost the same position as above on the passenger side (not shown),
s door 5015 has the same function. These Drs.
As usual, the s door 5015'Ps door 5W16 also serves as an rON-OFFJ switch for a room mirror (not shown).

In this embodiment, as described above, D"door 5W15 is
Since the Pss door 5016 is connected in series to the r cancel solenoid 9 and the Pss door 5016 is connected in series to the Ps cancel solenoid lO, when the Dr door switch 15 (or Pss door 5016 is rOFF), the Dr cancel solenoid 9 (or Dr cancel solenoid The configuration is such that solenoid 1) does not operate.

In FIG. 1, numeral 19 indicates a battery as a power source, numerals 33 and 34 indicate fuses, and numeral 35:
Shows ignition marker lamp.

Next, the operation of the circuit 20 will be explained.

When the ignition switch turns rON and the starter motor is driven, the warning lamp check 5W14
becomes rON, and the lamps 11 to 13 such as the door warning lamp 11 are lit.

Then, when the engine is started, the warning lamp check 5W14 becomes r OF F , so the lamps 11 to 14 are turned off. At this time, since the engine is started, the ignition marker lamp 35 is lit.

In this case, any door switch, Dr door 5
If W15 (or Ps door 5W16) is rON, that is, the door is open, the controller 8 detects this because the human power at point A (or point B in Fig. 1) is 10-(L)J. The door lighting lamp 11 is turned on.

This allows the passenger to know that the door is ajar. Also, at this time, if the Dr buckle SW6 (or Ps buckle 5W7) is rONJ, that is, the belt 22 is not properly attached to the buckle 31, the controller 8 detects this and the Dr bevel lamp 12 (or Ps bevel lamp 13) Turn on.

This allows the passenger to know that the seat belt is not properly fastened. When the belt 22 is correctly attached to the buckle 31, the Dr buckle SW6 (or Ps buckle 5W7) becomes "○FFJ", so the controller 8 turns off the lit Dr bevel lamp 12 (or Ps bevel lamp 13).

Here, for some reason, the door warning lamp 11
does not light up or the driver turns off the door warning lamp 1.
If you drive the vehicle with the door ajar without noticing the lighting of Dr door lock SW2. Ps
Since the door lock SW3 is provided, these Dr door locks SW2. Ps door lock S
Since the contact point of W3 is rOFF, the controller 8 does not operate the cancel solenoid 9.10. Therefore, the signal from the acceleration sensor is sent to the controller 8, so if this value exceeds a predetermined value, that is, if emergency locking is required in the event of a collision, etc., the controller 8 activates an emergency locking means (not shown). When activated, the unwinding rotation of the retractor 21 can be stopped in an emergency manner.

On the other hand, when the driver's seat door 50 is suddenly opened and the belt 22 is suddenly pulled out from the retractor 21 when getting off the vehicle, etc., when it is necessary to release the belt's emergency lock function,
Dr door 5W15 and Dr door lock SW2 are both "
ON”, the controller 8 drives the Dr cancel solenoid 9 and turns the Dr solenoid SW4 into r.
OF F, 1. Therefore, as described above, the output of the acceleration sensor becomes zero, and the emergency locking function of the seatbelt is released. This also applies to the passenger seat side.

Figure 2 shows the front of the door S and the door lock S in this embodiment.
The relationship between the front, cancel solenoid, and solenoid S is shown. As is clear from Fig. 2, the cancel solenoid becomes rON (operating state) when both the front of the door S and the front of the door lock S are rON, and one of them becomes 0FFJ for t seconds. It is controlled by the controller 8 so that it is turned OFF afterwards.

〔Effect of the invention〕

Since the present invention is configured and functions as described above, according to this, when the door switch detects that the door is opened and the door lock switch detects that the door is not locked to the vehicle body, Since the main control unit activates the belt lock release solenoid only when both of these switches sense that the door is open, there is a possibility that the driver may drive the vehicle with the door ajar. In this case, it is possible to effectively prevent the retractor's unwinding rotation emergency stop function from being released, and thereby to effectively prevent the inconvenience of the belt's emergency locking function being released when the vehicle is running with the door ajar. It is possible to provide an unprecedented and excellent passive seat safety device.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the circuit section which is the main part of the first embodiment of the present invention, and FIG. 2 shows the front of the door S, the front of the door lock S, the cancel solenoid, and the solenoid S in FIG. 1. FIG. 3 is an explanatory diagram showing the external appearance of a device having the circuit of FIG. 1. 2...Dr door lock SW, 3...P
s door lock SW, 8... Controller as main control unit, 9... Dr cancel solenoid as belt lock release solenoid, IO...
...Ps cancel solenoid as belt lock release solenoid, 15...Dr door SW, 1
6...Ps Door SW, 21...Retractor, 22...Belt, 26...:...Slip anchor 50 constituting the fulcrum of the belt...
·door.

Claims (1)

[Claims] (1) A retractor with an emergency stop function for unwinding rotation that senses the door acceleration/deceleration and belt withdrawal speed and locks the belt is installed at the bottom of the opening side of the door, and the fulcrum of the belt is provided on the door side. , the retractor has a built-in belt lock release solenoid that releases the emergency stop function of the unwinding rotation, and the belt is installed and closed in response to opening and closing of the door.
In a passive seat belt device having a structure in which release is automatically performed, a door switch is provided on the opening side of the door to detect opening/closing of the door, and a latch for locking the door to the vehicle body is provided with a door switch that detects opening/closing of the door. The main controller is equipped with a door lock switch that detects whether the door is opened or closed by detecting whether the door is locked, and activates the belt lock release solenoid only when both of these switches detect that the door is open. A passive seat belt device characterized by comprising: