JP4760182B2 - Seat belt control device - Google Patents

Description

  The present invention relates to a seat belt control device that controls the operation of a seat belt that restrains an occupant riding a vehicle.

  Conventionally, when the occupant removes the seat belt and tries to get off the vehicle, the technique for securely winding the seat belt and preventing the seat belt from being caught by a projection in the passenger compartment or being caught between doors is as follows: A seat belt control device described in Patent Document 1 is known.

The seat belt control device has a buckle switch state detection function for detecting that the buckle and the tongue plate are disengaged, a door switch state detection function, and an occupant detection device detection function. Using such various information, the seat belt control device performs an operation of winding the seat belt with a motor.
JP 2001-163186 A

  However, in the above-described seat belt control device, when the seat belt is retracted immediately after the buckle and the tongue plate are disengaged in order to securely wind the seat belt, There is a risk that the seat belt wound around the vehicle may get caught and cause discomfort to the occupant. On the other hand, when the seat belt is caught while the seat belt is being wound, even if the motor is stopped, it is necessary to repeatedly drive and stop the motor at regular intervals, which requires complicated control. End up.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and an object of the present invention is to provide a seat belt control device that can suppress the occurrence of pinching of the seat belt without performing complicated control. .

The present invention provides a seat belt control device capable of winding up a seat belt that restrains an occupant, a non-wearing detection means for detecting a non-wearing state of the seat belt, and a non-wearing state of the seat belt by the non-wearing detection means. If it is detected that the door has been opened from the closed state to the open state, it is determined that the occupant has got off the vehicle by using the getting-off detecting means for determining that the occupant has got off, and the getting-off detecting means. Thereafter, a closing operation detecting means for detecting that the door is closed from the open state to the closed state, and in order to solve the above-described problem, the closing detection means determines that the occupant has got off the vehicle, and then closes the door. when the closing operation of the door is detected by the operation detection unit, and a seat belt control unit for taking up the seat belt by the drive means, the seat belt control means, door position is閉位The closer to, to increase the take-up speed of the seat belt.

  According to the seat belt control device of the present invention, when it is determined that the vehicle occupant gets out of the vehicle and the door is opened from the open state to the closed state, and the door is closed, the seat belt is wound. Therefore, when it is determined that the door is about to be closed and there is a high possibility that the seat belt is pinched by the door, the seat belt can be wound up. Therefore, according to this seatbelt control device, the seatbelt can be wound before the seatbelt is pinched by the door, and the pinching of the seatbelt to the door can be suppressed without performing complicated control.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The present invention is applied to, for example, a seat belt control device configured as shown in FIG.

[Configuration of seat belt control device]
In this seat belt control device, an ECU (seat belt control means) 1 that controls the seat belt retracting operation controls a motor (drive means) 2 so that the driving force of the motor 2 causes the shoulder of the occupant. The webbing 3 attached to and detached from the buckle provided on the side of the seat portion of the seat is controlled to be wound. The ECU 1 also includes a buckle switch 4 for detecting a buckle state provided on the side of the seat portion of the occupant seat, a door opening / closing state including a door opening / closing angle signal indicating a door opening / closing angle and an door opening / closing speed signal indicating a door opening / closing speed. Various signals are input from a door switch (alighting detection means, a closing operation detection means) 5 for detecting the above, and an ignition switch 6 for supplying power to electrical components mounted on the vehicle.

  The ECU 1 detects that the occupant gets out of the vehicle at least when the webbing 3 is removed from the buckle by the buckle switch (non-mounting detection means) 4 and the non-mounted state of the webbing 3 is detected. The ECU 1 detects the occupant's dismounting operation when the door of the vehicle is opened from the closed state to the open state, and then detects the closing operation of the closed operation from the open state to the closed state. Note that the ECU 1 may determine that the getting-off operation is being performed by detecting that the ignition switch 6 has been operated in the off state. Further, the ECU 1 may determine the getting-off operation only by the door operation detected by the door switch 5, the door operation and the ignition switch 6 are turned off, and the webbing 3 has come off the buckle. May be combined to determine the getting-off operation.

  When the ECU 1 detects that the webbing 3 is not mounted and the getting-off operation is detected, the ECU 1 determines the opening position of the door from the door switch 5 when the passenger gets off the vehicle and the vehicle door is changed from the open state to the closed state. Detect by detection output. Here, the ECU 1 determines the occupant's dismounting operation, detects the open position of the door when the door changes to the open state, and then changes to the closed state. When the ECU 1 detects the open position of the door, the ECU 1 controls the motor 2 to change the winding speed of the webbing 3 based on the open position of the door, thereby preventing the webbing 3 from being caught between the doors. .

  Hereinafter, the door closing operation detection process performed by the seat belt control device after the getting-off operation is determined will be described.

  As shown in FIG. 2, in the vehicle 100 on which the seat belt control device is mounted, when the occupant tries to get off, the position of the door 101 is from the closed position shown by 101a to the lowest getting on / off position shown by 101b, 101c. The door 101 is operated by the occupant in the opening direction, such as a half-open position shown and a fully-open position shown by 101d. Further, in the vehicle 100, when the occupant gets off and tries to close the door, the door 101 is operated by the occupant toward the closed position from the fully opened position, the half-open position, or the lowest boarding position where the occupant can get on and off.

  Here, the vehicle body 102 and the door 101 are connected via a door link 103 as shown in FIG. The door link 103 includes a door link portion 103 </ b> A that is attached to the vehicle body 102 and is closest to the closed position of the door 101, a door link portion 103 </ b> B that distinguishes the closed position and the lowest boarding / alighting position of the door 101, and the lowest boarding / alighting position of the door 101. A door link portion 103C that divides the half-open position, a door link portion 103D that divides the half-open position and the fully-open position of the door 101, and a door link portion 103E are formed. Between these door link portions, a recess is formed in which the door-side moving body 104 of the door 101 becomes a stable position.

  When the door-side moving body 104 is located at 104a between the door link portion 103A and the door link portion 103B, the door 101 is in the closed position. When the door 101 is opened by the occupant, the door-side moving body 104 moves from the position indicated by 104a along the door link portion 103B as indicated by 104a ′, and the door link portion 103B and the door link portion 103C are indicated. It is located at 104b of the lowest boarding / alighting position. Further, when the door 101 is further opened from the lowest boarding / alighting position, the door 101 moves along the door link portion 103C and is located at the half-open 104c between the door link portion 103C and the door link portion 103D. Further, when the door 101 is further opened from the half-open position, the door 101 moves along the door link portion 103D and is located at the fully open 104d between the door link portion 103D and the door link portion 103E. As described above, the door link 103 causes the door-side moving body 104 to be positioned in a stable state between the door link portions at the lowest boarding / alighting position, the half-open position, and the fully-open position when the door 101 is gradually opened.

  When the passenger gets off the vehicle 100, the door side moving body 104 moves along the closing direction of the door link 103, contrary to when the door 101 is opened.

  In contrast, the door switch 7 of the seat belt control device includes a sensor unit 7 a that detects that the door-side moving body 104 has moved to a position indicated by 104 a in the door link 103, and the door-side moving body 104 in the door link 103. A sensor unit 7b that detects movement to the position indicated by 104b, a sensor unit 7c that detects that the door side moving body 104 has moved to a position indicated by 104c in the door link 103, and a door side moving body 104 that is a door link. And a sensor unit 7d that detects that it has moved to a position indicated by 104d in 103. Thereby, the door switch 7 can supply the ECU 1 with a signal indicating whether the current state of the door 101 is the closed position, the lowest boarding / alighting position, the half-open position, or the full-open position.

  Specifically, as shown in FIG. 4, the door switch 7 includes a power source 111, a resistance band 112 that communicates with the inside of the door link 103, and a door-side moving body 104 that moves along the door link 103. And a voltage detection unit 113 for detecting the presence. The door switch 7 applies a predetermined voltage to the resistance band 112 by the power supply 111 when the ignition switch 6 is in an ON state. The sensor parts 7 a, 7 b, and 7 c are provided between the door link parts and are provided as conductor parts that are electrically connected to the resistance band 112.

  Such a door switch 7 has a voltage value when the door-side moving body 104 is in the closed position indicated by 104a and a voltage when the door-side moving body 104 is in the lowest getting-on / off position indicated by 104b. The difference between the voltage value when the door-side moving body 104 is in the half-open position indicated by 104c, and the voltage value when the door-side moving body 104 is in the fully-open position indicated by 104d Detect state. That is, the voltage corresponding to the distance from the closed position corresponding to the length of the resistance band 112 to which the voltage from the power source 111 is applied changes to L1 at the lowest boarding position, L2 at the half-open position, and L3 at the fully-open position. The value is detected by the voltage detection unit 113. Moreover, this door switch 7 detects a voltage value linearly not only when the door side mobile body 104 exists between each door link part but when moving along a door link part.

  Accordingly, the ECU 1 linearly changes the movement amount (opening / closing angle), speed, or angular speed of the door 101 between the closed position and the lowest boarding position, between the lowest boarding position and the half-open position, and between the half-open position and the full-open position. It can be detected by the voltage value. Further, the ECU 1 can detect the door opening / closing angle signal and the door opening / closing speed signal based on the time change of the door opening / closing angle signal from the voltage value detected by the voltage detection unit 113, whereby the occupant slowly opens the door 101. It can be determined whether the door 101 is operating or the door 101 is operating quickly.

  Further, as shown in FIGS. 5 and 6, the ECU 1 controls the driving amount of the motor 2 so as to change the winding speed of the webbing 3 according to the door opening / closing angle signal when the door 101 is changed from the open state to the closed state. Control. As shown in FIG. 5A, the ECU 1 has the highest winding speed V1 in the door opening / closing amount (angle) from the lowest boarding / alighting position where the distance from the closed position is L1, and the distance from the closed position is At the door opening / closing angle from the half-open position of L2 to the lowest boarding / alighting position, V2 has a moderate winding speed, and the distance from the closing position is V3, the lowest winding speed at the door opening / closing angle from the fully open position to the half-open position of L3. The motor 2 is controlled so as to wind up the webbing 3. Further, as shown in FIG. 6A, the ECU 1 increases the winding speed between V2 and V1 while the door opening / closing angle gradually decreases from the lowest boarding / alighting position where the distance from the closed position is L1 to the closed position. While the door opening / closing angle gradually decreases from the half-open position of L2 to the lowest boarding / alighting position, the winding speed is gradually changed between V3 and V2, and the distance from the closed position is gradually changed. While the door opening / closing angle gradually decreases from the fully open position of L3 to the half open position, the motor 2 is controlled to wind up the webbing 3 at a constant winding speed of V3.

  Further, the ECU 1 controls the driving amount of the motor 2 so as to change the winding speed of the webbing 3 based on the door opening / closing speed signal when the door 101 is changed from the open state to the closed state. That is, when the door opening / closing speed signal is higher than a predetermined value based on an empirical value or the like that can be determined that the door 101 is suddenly closed by the occupant, it is shown in FIGS. 5 (A) and 6 (A). As shown in FIGS. 5 (B) and 6 (B), correction is performed so that the winding speed that is changed by the door opening / closing angle signal approaches V3 of the highest winding speed.

[Effect of the embodiment]
As described above in detail, according to the seatbelt control device to which the present invention is applied, it is determined that the vehicle occupant gets off and the door position when the vehicle door 101 is changed from the open state to the closed state is determined. The closer the door position is to the closed position of the door 101, the higher the winding speed of the webbing 3. Therefore, it is determined that the door 101 is about to be closed, and the webbing 3 is sandwiched between the doors 101. The higher the possibility is, the higher the winding speed of the webbing 3 can be made. Therefore, according to this seat belt control device, the webbing 3 can be wound before the webbing 3 is sandwiched between the doors 101, and the webbing 3 can be reliably prevented from being caught in the doors 101 without performing complicated control. .

  Further, according to this seat belt control device, the passenger 101 is detected to get off without using an occupant presence / absence detection device that detects that no occupant is seated on the seat, and the door 101 is closed. The webbing 3 can be quickly wound up at the following timing.

  Further, according to this seat belt control device, for example, even when the webbing 3 is caught by an arm, the winding speed of the webbing 3 can be reduced if the door 101 is in an open state. Pleasure can be reduced.

  Further, according to this seat belt control device, the winding speed of the webbing 3 determined by the door position is corrected to be higher as the change speed of the door position when it is closed is higher. In addition, the winding speed of the webbing 3 can be changed. That is, when the occupant is slowly closing the door 101, the webbing 3 can be reliably prevented from being caught without generating a high driving force by the motor 2, and when the occupant is closing the door 101 quickly, A high driving force can be generated by the motor 2 to reliably prevent the webbing 3 from being caught.

  Furthermore, according to this seat belt control device, as a configuration for detecting the door position when the door 101 is about to be closed, the door link 103 that connects the vehicle body 102 and the door 101, and the door position is closed. A door-side moving body 104 whose contact position with respect to the door link 103 is changed as it moves from the position to the fully open position, and the door position is detected by the amount of movement of the contact position of the door-side moving body 104 with respect to the door link 103. Therefore, the position of the door side moving body 104 with respect to the door link 103 can be detected linearly. Therefore, the winding speed of the webbing 3 that is changed according to the door position can be adjusted with high accuracy, and the webbing 3 can be prevented from being pinched by the door 101 more reliably.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

It is a block diagram which shows the structure of the seatbelt control apparatus to which this invention is applied. It is a top view showing the state of the door in a vehicle. It is the schematic which shows the vehicle body for detecting a door position, a door link, and a door side moving body. It is a block diagram which shows the structure which detects a door position based on the movement amount of the door side mobile body with respect to a door link with a door switch. (A) is a figure which shows the relationship between a door position and the winding speed of webbing, (B) is a figure which shows the relationship between the door position when the door opening and closing speed is high, and the winding speed of webbing. (A) is another figure which shows the relationship between a door position and the winding speed of webbing, (B) is another figure which shows the relationship between the door position when the door opening and closing speed is high, and the winding speed of webbing. It is.

Explanation of symbols

1 ECU
2 Motor 3 Webbing 4 Buckle Switch 5 Door Switch 6 Ignition Switch 101 Door 102 Car Body 103 Door Link 111 Power Supply 112 Resistance Band 113 Voltage Detection Unit

Claims (3)

In a seat belt control device capable of winding up a seat belt that restrains an occupant,
Non-wearing detection means for detecting a non-wearing state of the seat belt;
When the non-mounting detection means detects the non-wearing state of the seat belt, when it is detected that the door is opened from the closed state to the open state, the unloading detection means determines that the passenger has got off the vehicle. When,
A closing operation detecting means for detecting that the door is closed from the open state to the closed state after it is determined by the getting-off detecting means that the passenger has got off;
A seat belt control means for winding a seat belt by a driving means when a closing operation of the door is detected by the closing action detecting means after it is determined that the occupant has got off by the getting off detecting means ;
The seat belt control device, wherein the seat belt control means increases the seat belt winding speed as the door position is closer to the closed position . The closing operation detecting means detects a change speed when the door of the vehicle is changed from an open state to a closed state,
The seat belt control device according to claim 1 , wherein the winding speed is increased as the change speed is higher. A door link connecting the vehicle body and the door, and a door-side moving body whose contact position with respect to the door link is changed by the door position,
3. The seat belt control device according to claim 1, wherein the closing operation detection unit detects a door position based on a movement amount and a movement time of a contact position of the door-side moving body with respect to the door link. .

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