JP2525423B2 - Passive seat belt device - Google Patents

Description

Detailed Description of the Invention

An object of the present invention is to provide a passive seatbelt device capable of forcibly restraining an occupant to a seat by preventing troublesome wearing of a seatbelt and forgetting to wear the seatbelt. It is a thing. (Prior Art) Conventionally, there are various types of passive seat belt devices having the above-described configurations, and among them, there are some having the circuit configuration shown in FIG. 7, for example. That is, one end is ELR (Emergency Locking Retracto)
r: Emergency lock-type retractor) and the other end moves along the guide rails provided on the side roof rails on the driver's side and the passenger's side, respectively. And the motors 201 and 202 on the driver's side or the passenger's side for driving the seat belts to the wearing position and the releasing position, respectively, and the driver's side and the passenger's side operating in response to opening and closing of the driver's side or the passenger's side door, respectively. Door opening / closing switches 203, 204 and vehicle state detection switches 205-1, 205-2, which detect the states of various parts of the vehicle.
.., 205-n, and control means for driving the seat belt to the wearing position and the releasing position are built in the microcomputer 211 in the controller 210, and are also connected to the battery 212 directly in the controller 210. The door opening / closing switches 203 and 20 on the driver side and the passenger side
The driver side and passenger side door open / close detection circuits 213 and 214 that output detection signals in response to the operation of 4 and the vehicle state detection switches 205-1 and 205-2 that are also in the controller 210 and directly connected to the battery 212. A vehicle state detection circuit 215 that outputs a detection signal in response to the operation of 205-n
, 215-2, ..., 215-n. In this passive seat belt device, for example, when the driver side door is opened to get in a vehicle, the driver side door open / close detection circuit 213 in the controller 210 detects the state,
The microcomputer 211 actuates the driver-side releasing switching unit 220 to excite the relay coil 221a of the driver-side releasing relay 221 to move the movable contact piece 221b to the earth side contact 221c.
Is sucked from the power source side contact 221d to rotate the driver side motor 201 in the releasing direction, and the seat belt is driven from the wearing position to the releasing position to form an occupant riding space. Also,
When the driver side door is closed, the driver side door open / close detection circuit 213 in the controller 210 causes the driver side door open / close switch 203.
That state is detected by the microcomputer 211
Activates the driver-side mounting switching unit 222 to excite the relay coil 223a of the driver-side mounting relay 223 to attract the movable contact piece 223b from the ground side contact 223c to the power source side contact 223d to drive the driver side motor. The 201 is rotated in the wearing direction to drive the seat belt from the release position to the wearing position to forcibly restrain the occupant sitting on the seat. Regarding the passenger seat side, in order to drive the seat belt in the releasing direction, the passenger seat side releasing switching unit 224 and the passenger seat side releasing relay 225 are provided, and in order to drive the seat belt in the wearing direction, A seat side switching unit 226 and a passenger side release relay 227 are provided. (Problems to be solved by the invention) However, in the above-described conventional passive seat belt device, the driver seat side is released due to an impact applied to the controller 210 from the vehicle body, an overcurrent or an overvoltage generated in the controller 210, or the like. Of the power switching unit 220 and the mounting switching unit 222 in the energized state or the disconnected state, the disconnection of the relay coils 221a and 223a of the release relay 221 and the mounting relay 223, and the release relay 221 and the mounting relay 223. Moving contacts 221b, 223b and power supply side contact 22
There is a possibility that welding with 1c, 223c etc. may occur, and in such a situation there is a problem that the seat belt can not be stopped and the seat belt starts to move unexpectedly, so it is safe to wear There was a problem of impairing sex. Further, the passenger side has the same problem. (Object of the Invention) Therefore, the present invention has been made in view of the above-mentioned conventional problems, and it is possible to reliably stop the motor even when the mounting relay or the releasing relay causes an abnormal operation. It is an object of the present invention to provide a passive seat belt device having the above structure.

Configuration of the Invention

(Means for Solving the Problems) The structure of the passive seat belt device according to the present invention for achieving the above object will be described with reference to the functional block diagram shown in FIG. 1. One end is fixed at a predetermined position. Along with a guide rail provided on the side roof according to the rotation of the motor 1, the other end of the seat belt 2 moves to a mounting position or a releasing position, a door opening / closing detecting means 4 for detecting opening / closing of the door 3, and the motor. A mounting relay 5 for rotating the motor 1 in the mounting direction and a releasing relay 6 for rotating the motor 1 in the releasing direction are provided, and the mounting relay 5 is responsive to a detection signal from the door opening / closing detecting means 4. The seat belt 2 is driven to the wearing position or the releasing position via the releasing relay 6 and the wearing relay 5 and the releasing relay 6 are driven from the position of the seat belt 2. It is characterized in that it is provided with a control means 7 for judging an abnormality and bringing the motor 1 into a stopped state. (Example) Hereinafter, the present invention will be described with reference to the drawings. 2 to 4 are views showing an embodiment of the passive seat belt device according to the present invention. FIG. 2 is a diagram showing a circuit configuration of the passive seat belt device. In FIG. 2, 11 is a driver side door (first
(Corresponding to the door 3 shown in the figure), the driver side door switch that operates in response to opening and closing, and 12 the passenger side that operates in response to opening and closing the passenger side door (corresponding to the door 3 shown in FIG. 1) Door switches 13-1, 13-2, ... 13-n are key switches that operate in response to the insertion of a key into the key cylinder, an ignition switch that detects engine operation from the ignition position, and a driver's seat to be described later. The respective release position switches that operate in response to the shoulder belt 37 of the side seat belt device 32 and the shoulder belt of the passenger seat side seat belt device being in the release position, the shoulder belt 37 of the driver side seat belt device 32 to be described later, and Each wearing position switch that operates in response to the shoulder belt of the passenger seat side seat belt device being in the wearing position, and a tongue 40 of the waist belt 42 to the buckle body 39 described later.
Is a switch provided in each part of the vehicle such as a lap switch that operates in response to the insertion of the. The driver side door switch 11, the passenger side door switch 12, and the switches 13-1, 13-2, ... 13-n of each part of the vehicle are directly connected to the vehicle-mounted battery 21 in the controller 20. A driver side door open / close detection circuit 22 (corresponding to the door open / close detection means 4 shown in FIG. 1) and a passenger side door open / close detection circuit 23 (door open / close detection means 4 shown in FIG. 1) directly connected to the battery 21. , And a detection circuit 25-1, 25-2, ... 25-n of each part of the vehicle connected to the battery 21 via the relay switch 24a of the power supply relay 24, respectively, Each detection circuit 22,23,25-1,25-2, ... 25-n
The detection signals of are input to the microcomputer 26. The microcomputer 26 includes a relay for releasing the driver side and the passenger side, which will be described later, in response to the detection signals of the driver side and passenger side door open / close detection circuits 22 and 23.
Drive the shoulder belt 37 of the driver's seat side seat belt attachment 32 and the shoulder belt of the passenger seat side seat belt device to the attachment position or the release position via 47, 51 and the attachment relays 48, 52,
Also, from the position of the shoulder belt 37 of the driver's seat belt device 32 and the shoulder belt of the passenger side seat belt device, an abnormality is detected in the release relays 47, 51 and the wearing relays 48, 52 on the driver's side and the passenger side. A control means (corresponding to the control means 7 shown in FIG. 1) which makes a judgment to stop the motor 30 on the driver's seat side and the motor 31 on the passenger seat side (corresponding to the motor 1 shown in FIG. 1)
Built in. In addition, the driver side and passenger side motors 30, 31 are
Each of the seat belt devices 32 as shown in FIG. 3 is driven. Here, the seat belt device 32 on the driver's side will be described as an example. One end is ELR34 (Emergency Locking Ret
ractor: An oblique shoulder belt that is fixed to the floor via an emergency lock-type winding device) and that the other end moves to the mounting position and the releasing position along the guide rail 36 provided on the side roof rail 35 on the driver side. 37 (corresponding to the seat belt 2 shown in FIG. 1) and restrains the occupant's waist while seated on the seat 38 by inserting the tongue 40 into the buckle body 39.
A waist belt 42 having an ELR 41, and the shoulder belt 3
The other end of 7 is moved by driving the perforated resin tape 43 by rotation of the driver side motor 30. Further, the driving of the motor 30 on the driver's seat side will be described. A release switching unit 45 and a mounting switching unit 46 that operate according to an instruction from the microcomputer 26 are provided.
When the release switching unit 45 is activated, the relay coil 47a of the release relay 47 (corresponding to the release relay 62 shown in FIG. 1) is excited to move the movable contact piece 47b to the earth side contact 47c.
From the power source side contact 47d, the driver side motor 30 rotates in the releasing direction, the other end of the shoulder belt 37 is moved from the mounting position of the guide rail 36 to the releasing position to form an occupant boarding space. When the mounting switching unit 46 is operated, the relay coil 48a of the mounting relay 48 (corresponding to the mounting relay 5 shown in FIG. 1) is excited to move the movable contact piece 48b from the ground side contact 48c to the power supply side. Suction to contact 48d, motor on driver side
30 rotates in the mounting direction, moves the other end of the shoulder belt 37 from the release position of the guide rail 36 to the mounting position, and restrains the occupant sitting on the seat 38. Similarly, the passenger side motor 31 is also provided with a release switching unit 49 and a mounting switching unit 50, and each has a release relay 51.
A release relay 6 (corresponding to the release relay 6 shown in FIG. 1) and a mounting relay 52 (corresponding to the mounting relay 5 shown in FIG. 1) are provided. Further, 53 is a reset circuit. Next, the operation of the passive seat belt device having the above configuration will be described. Here, the driver's seat side will be described as an example. First, connect the battery 21 to the controller 20,
The control means as a function realizing means built in the microcomputer 26 starts its operation. This function realizing means will be described concretely. As shown in FIG.
In step 102, it is determined whether or not the driver side door is in the "open" state, and if it is determined that the driver side door is in the "closed" state (YES), in step 102, the shoulder belt 37
Determine whether or not is in the mounting position. When it is determined in step 102 that the shoulder belt 37 is not in the wearing position (NO), step 103
In, it is determined whether or not a predetermined time has elapsed from the start of wearing the shoulder belt 37, and in step 103,
When it is determined that the predetermined time has not elapsed since the start of wearing the shoulder belt 37 (NO), in the next step 104,
The motor 30 on the driver's seat side is rotated in the mounting direction to shift to another program. That is, when the driver's seat side door is closed, the microcomputer 26 activates the mounting switching section 46 to excite the relay coil 48a of the mounting relay 48 and attract the movable contact piece 48b to the power source side contact 48d. , Battery 21 → contact 48d on power supply side of mounting relay 48 → movable contact 48b → motor 30 on driver's side → movable contact 47b on relay 47 for release → contact 47c on earth side
→ A grounding circuit is established, the motor 30 is rotated in the mounting direction, and the shoulder belt 37, which was in the release position to form the boarding / alighting space, is moved to the mounting position. The motor
The rotation of 30 is recognized by the microcomputer 26 by the relay signals of the relays 47 and 48. When it is determined in step 102 that the shoulder belt 37 is in the wearing position (YES), step 105
At, the motor 30 is stopped and the program shifts to another program. That is, when the motor 30 in the above description is in the rotating state, the microcomputer 26 deactivates the mounting switching unit 46 in operation, and the mounting relay 48 is operated.
Contact the movable contact piece 48b of the
Apply electromagnetic braking to 30 and stop it. If it is determined in step 103 that the shoulder belt 37 is not in the wearing position after a predetermined time has passed from the start of wearing (YES), the motor 30 is stopped and another program is executed in step 106. When the motor 30 starts rotating in an unexpected state due to some abnormality in the release relay 47 or the mounting relay 48, or when the motor 30 cannot be stopped in the normal state , After a predetermined time has passed from the start of wearing,
The microcomputer 26 appropriately operates the release relay 47 or the mounting relay 48 to electromagnetically brake the motor 30 to bring it into a stopped state. That is, as shown in FIG. 5, when the mounting relay 48 malfunctions and the movable contact piece 48b is welded to the power source side contact 48d, the microcomputer 26 activates the release switching unit 45 to release the release contact. The movable contact piece 47b of the relay 47 is attracted to the power source side contact 48d, and the motor 30 is electromagnetically braked and stopped. On the other hand, the case where the driver's seat side door is opened will be described. If it is determined in step 101 that the driver's seat side door is not in the “closed” state (NO), in step 110 the shoulder belt 37 is set to the release position. If it is determined in step 110 that the shoulder belt 37 is not in the release position (NO), it is determined in step 111 whether a predetermined time has elapsed from the start of releasing the shoulder belt 37. If it is determined in step 111 that the predetermined time has not elapsed since the start of releasing the shoulder belt 37 (N
In step 112, the motor 30 is rotated in the releasing direction to shift to another program. That is, the microcomputer 26 operates the release switching unit 45 to cause the relay coil 47 of the release relay 47.
Exciting a, attracting the movable contact 47b to the contact 47d on the power supply side, the battery 21 → the contact 47d on the power supply side of the release relay 47 → the movable contact 47b → the motor 30 on the driver side → the movable contact of the mounting relay 48 Four
The circuit of 8b → ground side contact 48c → ground is established, and the motor 30 rotates in the releasing direction. The rotation of the motor 30 is recognized by the microcomputer 26 by the relay signals of the relays 47 and 48. When it is determined in step 110 that the shoulder belt 37 is in the release position (YES), step 105
At, the motor 30 is stopped and the program is shifted to another program. That is, in the rotating state of the motor 30 in the above description, the microcomputer 26 deactivates the releasing switching unit 45 in the operating state, and the releasing relay 47.
The movable contact piece 47b is brought into contact with the earth side contact 47c to electromagnetically brake the motor 30 to bring it into a stopped state. Further, when it is determined in step 111 that the shoulder belt 37 is not in the release position when a predetermined time has elapsed from the start of wearing (YES), the motor 30 is stopped in step 113. That is, when some abnormality occurs in the release relay 47 or the mounting relay 48 and the motor 30 starts to rotate in an unexpected state, a predetermined time has elapsed from the start of the release and then the microcomputer 26
Properly operates the release relay 47 or the mounting relay 48, electromagnetically brakes the motor 30 to stop the motor 30, and shifts to another program. That is, as shown in FIG. 6, when the releasing relay 47 has an abnormality and the movable contact piece 47b is welded to the power source side contact 47d, the microcomputer 2
6 activates the mounting switching unit 46, and the mounting relay 4
The movable contact piece 48b of 8 is attracted to the contact 48d on the power source side, and the motor 30 is electromagnetically braked to bring it into a stopped state. The same operation is performed on the passenger side. In the embodiment described above, when the shoulder belt 37 is moved in the releasing direction due to some abnormality of the releasing relay 47 or the mounting relay 48, the shoulder belt 37 is brought into the stopped state, but the shoulder belt 37 is moved in the releasing direction. If it does, it is a safety direction that does not harm the occupant as compared with the case where the shoulder belt 37 moves in the wearing direction, and therefore step 111 and step 113 shown in FIG. Should an abnormality occur in the relay 48 for use, the shoulder belt 37 may be moved in the releasing direction without impairing the safety of the device. Further, in the above-described embodiment, the abnormality of the releasing relay 47 and the mounting relay 48 is determined by the elapse of a predetermined time in steps 103 and 111 shown in FIG. Also, the microcomputer 26 may detect an abnormality in the releasing relay 47 or the mounting relay 48 based on the relay signal of the mounting relay 48.

【The invention's effect】

As described above, according to the passive seat belt device of the present invention, one end is fixed at a predetermined position, and the other end is attached or released along the guide rail provided on the side roof according to the rotation of the motor. A seat belt that moves to a position, a door opening / closing detection unit that detects opening / closing of a door, a release relay that rotates the motor in a mounting direction, and a release relay that rotates the motor in a release direction, and In response to the detection signal of the door opening / closing detection means, the seatbelt is driven to the mounting position or the releasing position via the mounting relay and the releasing relay, and the mounting relay or the releasing relay is driven from the position of the seatbelt. The mounting relay or the release relay is equipped with the control means that determines the abnormality and puts the motor in the stopped state. Even if some abnormality occurs in the seat, the motor is reliably stopped by operating the mounting relay or the release relay appropriately, preventing the seat belt gear from moving out unexpectedly and improving the safety of the device. The excellent effect of being able to do is obtained.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing a configuration according to an embodiment of a passive seat belt device according to the present invention, and FIG. 2 is an explanatory diagram showing a circuit configuration according to an embodiment of a passive seat belt device according to the present invention. FIG. 4 is a schematic explanatory view showing the overall structure of the passive seat belt device, FIG. 4 is a flow chart showing a program incorporated in the microcomputer of FIG. 2, and FIG. 5 is a time showing an operating state of the passive seat belt device at the time of wearing. FIG. 6 is a time chart showing the operating state of the passive seat belt device at the time of release, and FIG. 7 is an explanatory diagram showing the circuit configuration of the conventional passive seat belt device. 1 ... motor, 2 ... seat belt, 3 ... door, 4 ... door open / close detection means, 5 ... mounting relay, 6 ... release relay, 7 ... control means.

Claims (1)

(57) [Claims] 1. A seat belt whose one end is fixed at a predetermined position and whose other end moves to a mounting position or a releasing position along a guide rail provided on a side roof in response to rotation of a motor, and opening / closing of a door is detected. A door opening / closing detection means, a mounting relay for rotating the motor in a mounting direction, and a releasing relay for rotating the motor in a releasing direction, and the mounting in response to a detection signal of the door opening / closing detection means. Means for driving the seatbelt to a wearing position or a releasing position via an operating relay and a releasing relay and judging an abnormality of the wearing relay or the releasing relay from the position of the seatbelt to put the motor in a stopped state A passive seat belt device characterized by having.