JPH0445965Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is used in an automatic seat belt device that automatically attaches occupant restraint webbing to an occupant. The present invention relates to an automatic seat belt device that can be removed from a slider that moves in the longitudinal direction of a vehicle while being guided by a guide rail.

[Prior Art] An automatic seat belt device has been proposed that automatically attaches or detaches webbing to an occupant.

In this automatic seatbelt device, one end of the webbing is wound up by a winding device installed in the center of the vehicle, and the other end of the webbing is guided by a guide rail installed near the roof side of the vehicle to open the door. The structure is such that the webbing is locked to a slider that can be moved in the longitudinal direction of the vehicle as the webbing is opened or closed, and the slider is moved to attach or release the webbing.

In other words, when the slider moves toward the front of the vehicle on the guide rail, a space is created between the middle part of the webbing and the seat, and when the occupant sits on the seat, the slider moves toward the rear of the vehicle on the guide rail. , and the webbing is put on. This type of automatic seatbelt device reduces power consumption by preventing the seatbelt drive unit that drives the seatbelt drive unit from operating even when the door is opened or closed when the webbing detaches from the seatbelt drive unit. There is a method designed to achieve this (see Japanese Utility Model Application Publication No. 100251/1983).

[Problems to be solved by the invention] However, in the above-mentioned seat belt device in which the seat belt drive device is not activated even when the door is opened or closed, when the webbing is removed from the seat belt drive portion, the seat belt drive device is not activated at that point. Since the drive of the belt drive section is stopped, depending on the removal position, it may interfere with the seat belt drive section when the occupant gets on or off the seat.

The present invention takes the above facts into account, and aims to provide an automatic seat belt device that can reduce power consumption and prevent the slider from interfering with the occupant when the occupant gets on and off the vehicle.

[Means for Solving the Problems] In order to solve the above problems, in the present invention, a slider that is removably connected to one end of the occupant restraint webbing moves the vehicle lower side end of the front pillar in response to opening and closing of the door. In an automatic seat belt device that automatically attaches webbing to an occupant by moving along a guide rail extending from near a roof side rail to a center pillar, detecting that the webbing is removed from the slider. and a detecting means for moving the slider to the vicinity of the lower end of the vehicle of the front pillar of the guide rail when the detecting means detects that the webbing has been removed from the slider, so that at least the webbing is removed. The present invention is characterized by comprising a control means for stopping the slider until it is attached to the slider.

[Operation] Therefore, according to the present invention, when the webbing is connected to the slider, the slider is driven in response to opening and closing of the door. As a result, the webbing is automatically attached to and removed from the occupant.

When the webbing is removed from the slider, this is detected by the detection means. When the detection means detects that the webbing has been removed from the slider, the control means moves the slider along the guide rail to near the end of the front pillar on the lower side of the vehicle and stops.

That is, since the slider is located near the end of the front pillar on the lower side of the vehicle when the occupant gets on and off, the slider does not interfere with the occupant when getting on and off, allowing the occupant to get on and off smoothly.

Furthermore, since the slider is stopped by the control means until the webbing is attached to the slider, the slider from which the webbing has been removed will not be moved when the door is opened or closed, and power is wasted. It is never consumed.

[Embodiment] FIGS. 1 and 2 show schematic diagrams of an automatic seat belt device 10. FIG. FIG. 2 is a view corresponding to arrow D of the right seat in FIG. 1.

As shown in FIGS. 1 and 2, a guide rail 14 is arranged on the roof side 12 of the vehicle. The leading end of the guide rail 14 extends along the front pillar 16, and the rear end is bent at a substantially right angle along the center pillar 18. A slider 20 is slidably disposed within the guide rail 14. A buckle device section 23 is provided at the end of the slider 20 on the passenger compartment side. This buckle device section 23 removably holds a tongue plate 25 attached to one end of the webbing 22. The other end of the webbing 22 is wound up in layers with a predetermined biasing force onto a winding device 24 disposed in the center of the vehicle. This winding device 24 includes
It has a built-in inner lock mechanism that instantly stops the webbing 22 from being pulled out in the event of a vehicle emergency.

Further, this winding device 24 has a built-in retractor switch 27 that detects whether the webbing 22 is pulled out. The retractor switch 27 is closed when the webbing 22 is pulled out by the occupant, and is opened when the webbing 22 is removed from the slider 20 and wound up. This retractor switch 27 is connected to a control circuit 29 as a control means.

A wire accommodating groove (not shown) is formed in the guide rail 14, and the wire 26, which is a cable, is tightly accommodated in the guide rail 14 and guided so as to be slidable in the longitudinal direction. The tip of the wire 26 is attached to the slider 20, so that the slider 20 moves together with the wire 26. Also, the rear end of the wire 26 is connected to the center pillar 1.
8 is connected to a drive 28 attached to the lower end of the 8. A motor 30 is included in this drive device 28.
The wire 26 slides within the guide rail 14 under compressive or tensile force due to the rotation of the winding shaft, which is driven by the forward and reverse rotation of the motor 30. Furthermore, the slider 20 is adapted to move toward the front or rear of the vehicle. This motor 30 is connected to a control circuit 29, and is driven to rotate forward or backward under the control of this control circuit 29, thereby moving the slider 20 forward or backward of the vehicle.

A front limit switch 32 is disposed at a forward portion of the guide rail 14 (position A in the figure), and is configured to detect the vehicle front stop position within the normal movement range of the slider 20. As shown in FIG. 3, this front limit switch 32 has a contact (a contact) 32 that changes from a normally open state to a closed state when the wire 26 comes into contact with the contactor.
A. A structure is used which is provided with a contact (b contact) 32B that changes from a normally closed state to an open state when the wire 26 comes into contact with a contactor.

Furthermore, a most advanced limit switch 33 is disposed at the tip of the guide rail 14 further forward of the vehicle, that is, near the lower end of the front pillar on the vehicle side (position C in the figure). The most advanced stopping position can be detected. The most advanced limit switch 33 has a slider 20 that moves guided by the guide rail 14.
The type of contact used is one that is equipped with a contact (b contact) that changes from a normally closed state to an open state when it comes into contact with contact number 3.

A rear limit switch 34 is arranged at the rear end of the guide rail 14 (position B in the figure).
The rearmost stop position of the slider 20 can be detected. This rear limit switch 34 is provided with a contact (b contact) that changes from a normally closed state to an open state when the slider 20, which moves while being guided by the guide rail 14, comes into contact with the contact of the rear limit switch 34. things are used.

A front limit switch 32, a most extreme limit switch 33, and a rear limit switch 34, which detect the positions of the slider 20 at positions A, B, and C, are each connected to a control circuit 29.

Further, a door switch 36 is arranged on the door, so that the open/closed state of the door can be detected. This door switch 36 is also connected to the control circuit 29.

Although not shown in FIGS. 1 and 2, an ignition switch is provided around the steering column, and an ACC switch 38 that operates in conjunction with the ignition switch is provided. connected to.

Next, the control circuit 29 will be explained using FIG. 3.

As shown in FIG. 3, the control circuit 29 is a relay
A main part is constituted by _R1 to _R4 , and front limit switches 32, 33, 34, a retractor switch 27, and a door switch 36 are connected to these.

One end of the coil 40 of relay _R3 is connected to the + of the vehicle power supply.
pole, and the _other end is the normally open contact (a
Contact) 44A and normally open contact (A contact) of relay _R1
46A to the negative pole of the power supply.

In addition, the coil 40 of the relay _R3 has the normally closed contact of the rear limit switch 34 and the ACC switch 38.
and one of the contacts of the door switch 36 for detecting the door closed state are connected in series. Further, one end of a normally open contact (a contact) 46A of a relay _R1 is connected in series to the other common contact of the door switch 36.
The other end is connected to the - pole of the power supply.

One end of the coil 42 of relay R ₄ is connected to the + pole of the power supply, and the other end is connected to the front limit switch 3.
The normally closed contact 32B of No. 2 and the contact of the door switch 36 for detecting the door open state are connected in series. Further, the normally closed contact (b contact) of the most advanced limit switch 33 and the normally closed contact 46B (b contact) of the relay R ₁ are connected in series to the other end of the coil 42, and are connected to the negative pole of the power source. .

Further, the retractor switch 27 and the coil 46 of the relay _R1 are connected in series between the + and -poles of the electrodes.

Furthermore, the normally closed contact 4 of relay _R1 is connected to the + pole of the power supply.
6B (b contact) and normally open contact _44A (a
The normally open contact 32A (a) of the front limit switch 32 is connected in parallel with the
contact) and one end of the coil 44 of relay _R2 are connected in series, and the other end is connected to the - pole.

Next, a description will be given of the motor drive circuit 48 shown in FIG. 4, which switches the motor 30 between forward and reverse rotation.

Motor 30 is connected to a power source through contacts corresponding to coils 40 and 42 of relay R ₃ and relay R ₄ shown in FIG. 3, respectively.

The negative pole of the power supply is connected to the normally closed contact (b contact) 40B of relay _R3 , and the normally open contact (a contact)
The + pole of the power supply is connected to 40A.

Further, the negative pole of the power source is connected to the normally closed contact (b contact) 42B of the relay _R4 , and the positive pole of the power source is connected to the normally open contact (a contact) 42A. The common contact is connected to the motor 30.

When the coil 40 of the relay R ₃ is excited, the contact 40A of the relay R ₃ is closed, and current is supplied in the direction of the arrow E. This causes motor 3
0 is set to be rotated in the normal direction. Also relay
When the coil 42 of R ₄ is excited, the a contact 42A of relay R ₃ is closed, and current is supplied in the direction of arrow F. This causes the motor 30 to be rotated in reverse.

Next, the operation of this embodiment will be explained.

A tongue plate 25 attached to one end of the webbing 22 is attached to the buckle device section 2 of the slider 20.
3, before the passenger gets on board,
The slider 20 is stopped at position A shown by the two-dot chain line in FIG. As a result, a space is created between the webbing 22 and the seat, allowing the occupant to ride. At this time, the webbing 22 has been sufficiently pulled out from the take-up device 24, so the retractor switch 27 is turned on. Therefore, the coil 46 of relay R is energized, and a of relay _R1 is energized.
The contact 46A is changed from a normally open state to a closed state, and the b contact 46B is changed from a normally closed state to an open state. Further, since the slider 20 has moved to the A position, the normally closed contact 32B of the front limit switch 32 is changed from the closed state to the open state, and the normally open contact 32A is changed from the open state to the closed state. Further, the rear limit switch 34 is a normally closed contact.

When the passenger closes the door after boarding the vehicle, the door switch 36
detects that the door is closed, and when the ACC switch 38 is turned on, the coil 40 of the relay _R3 is energized. Due to this excitation, the motor 30 is rotated in the normal direction, and the slider 20 is moved from the A position to the B position at the rear of the vehicle.

When the slider 20 reaches position B, the rear limit switch 34 is changed from a normally closed contact to an open state, and the coil 40 of relay _R3 is demagnetized. Due to this demagnetization, normal rotation of the motor 30 is stopped. As a result, the occupant is placed in a state where the webbing is attached. At this time, the b contact 32 of the front limit switch 32
B is a normally closed contact.

In this state, when the vehicle is stopped and the webbing 22 is to be removed, the ACC switch 38 is turned off and the door is opened. When door switch 36 detects this door open state, relay _R4
The coil 42 of is energized. With this excitation,
The motor 30 is reversed and the slider 20 is moved from the B position to the A position. As a result, the occupant is brought into a state in which the webbing is released.

Here, a case will be explained in which the passenger removes the tongue plate 25 from the buckle device section 23 and removes the webbing 22 from the slider 20 while the webbing is being attached or not attached, that is, when the slider 20 is in the A position or the B position. .

When the webbing 22 is removed from the slider 20 while the slider 20 is in the A position, the webbing 22 is taken up by the take-up device 24 . When the webbing 22 is wound up, the retractor switch 27 is turned off. When retractor switch 27 is turned off, coil 46 of relay _R1 is demagnetized.
This demagnetization changes the b contact 46B of relay _R1 from an open state to a normally closed contact. Further, the a contact 46A of the relay _R1 changes from the closed state to the open state. This energizes the coil 42 of relay _R4 . Due to this excitation, the motor 30 is reversely rotated, and the slider 20 is moved from the A position to the C position further in front of the vehicle. When the slider 20 reaches the C position, the normally closed contact (b contact) of the most advanced limit switch 33 at the most distal end is opened, the coil 42 of the relay R ₄ is demagnetized, the motor 30 stops rotating, and the slider 20 movement is stopped, in this state the relay
Since the a contact 46A of _R1 is open, the slider 20 will not be moved regardless of whether the door is opened or closed. Therefore, it is possible to prevent power consumption from being wasted due to the slider 20 being moved when unnecessary.
Furthermore, the slider 20 does not move when unnecessary, thereby preventing the occupant from feeling uncomfortable.

When the webbing 22 is removed from the slider 20 while the slider 20 is in the B position, the webbing 22 is taken up by the take-up device 24 . When the webbing 22 is wound up, the retractor switch 27 is turned off. When retractor switch 27 is turned off, coil 46 of relay _R1 is demagnetized.
This demagnetization changes the contact 46B of relay _R1 from an open state to a normally closed contact. Further, the a contact 46A of the relay _R1 changes from the closed state to the open state. This energizes the coil 42 of relay _R4 . Due to this excitation, the motor 30 is reversely rotated and the slider 20 is moved toward the C position. When the slider 20 passes the A position, the front limit switch 32
is activated, the normally open contact 32A is in a closed state, and the normally closed contact 32B is in an open state. When the normally open contact of the front limit switch 32 is closed, the relay
Coil 44 of R ₂ is energized. Due to this excitation, the a contact 44A of relay _R2 changes from the open state to the closed state. As a result, the coil 44 is self-maintained in excitation. Slider 20 passes position A and C
When the position is reached, the most advanced limit switch 33 is activated, the normally closed contact changes from the closed state to the open state, the reverse rotation of the motor 30 is stopped, and the movement of the slider 20 is stopped. In this state, the a contact 4 of relay _R1
Since 6A is in the open state, the slider 20 will not be moved regardless of whether the door is opened or closed. Therefore, it is possible to prevent power consumption from being wasted due to the slider 20 being moved when unnecessary.

Next, a case will be described in which the webbing 22 is connected to the slider 20 which has been removed and moved to the C position.

A passenger attaches the tongue plate 2 attached to the webbing 22 to the buckle device section 23 of the slider 20.
When the webbing 22 is sufficiently pulled out from the take-up device 24 in order to connect the slider 20 and the webbing 22, the retractor switch 27 is turned on. When retractor switch 27 is turned on, coil 46 of relay _R1 is energized. Due to this excitation, the a contact 46A of relay _R1 changes from the open state to the closed state. The coil 44 of relay _R2 is
When the webbing 22 is removed from the slider 20 and taken up by the take-up device, it is energized, and the a contact 44A of the relay _R2 changes from the normally open state to the closed state. Therefore, the coil 40 of relay _R3 is energized, and the motor 30 is rotated in the forward direction.
As a result, the slider 20 is moved toward the rear of the vehicle.

If the door is open, slider 2
0 passes the A position and the operation of the front limit switch 32 is turned off, the normally open contact 32A of the front limit switch 32 changes from the normally closed state to the open state. This causes relay _R2 's a
The contacts change from the closed state to the open state to demagnetize the coil 40 of relay _R3 . As a result, normal rotation of the motor 30 is stopped, and movement of the slider 20 is stopped at the A position.

Therefore, the buckling device section 2 of this slider 20
3, the tongue plate 25 of the webbing 22 is engaged and connected, the door is closed, and the ACC switch 38 is turned on, the slider 20 moves to position B and the occupant is put in the webbing state.

Also, if the door is closed, the slider 20
passes the A position, front limit switch 32 is deactivated, and coil ₄ of relay R2 is turned off.
4 is demagnetized, but if the ACC switch 38 is turned on, the coil 40 of the relay _R3 continues to be energized, so the slider 20 is further moved toward the rear of the vehicle. When the slider 20 reaches the B position, the rear limit switch 34 detects this and the normally closed contact changes from the closed state to the open state, so that the coil 40 of the relay _R3 is demagnetized. Therefore, normal rotation of the motor 30 is stopped, and movement of the slider 20 is stopped.

Therefore, the buckling device section 2 of this slider 20
When the tongue plate 25 of the webbing 22 is engaged with the tongue plate 3 of the webbing 22 and connected, the occupant is put in the webbing state.

In this embodiment, in order to detect the connection between the webbing 22 and the slider 20, the retractor switch 27 disposed in the take-up device 24 is used to detect the pulling out and retraction of the webbing 22. Buckle device part 23 and tongue plate 2
It may be a detector that detects the engagement of No.5.

In addition, in this embodiment, the webbing 22 is
Detecting that it has been pulled out from slider 4, slider 2
Although the slider 20 starts moving to the A position, a manual switch may be used to start moving the slider 20 to the A position.

[Effects of the invention] With the above structure, according to the invention, it is possible to obtain an automatic seatbelt device that can reduce power consumption and prevent the slider from interfering with the occupant when the occupant gets on and off the vehicle. You can get excellent results.

[Brief explanation of drawings]

FIG. 1 is a partial perspective view of a vehicle to which an automatic seat belt device according to the present invention is applied;
3 is a control circuit diagram of an automatic seat belt device showing an embodiment of the present invention, and FIG. 4 is a motor drive circuit diagram. 10... Automatic seat belt device, 2
0...Slider, 22...Webbing, 27...
Retractor switch, 29...control circuit.

Claims (1)

[Scope of utility model registration request] A slider removably connected to one end of the occupant restraint webbing moves along a guide rail extending from near the vehicle lower end of the front pillar to the center pillar via the roof side rail as the door is opened and closed. An automatic seat belt device for automatically attaching webbing to an occupant includes a detection means for detecting that the webbing has been removed from the slider, and a detection means for detecting that the webbing has been removed from the slider. control means for moving the slider near the vehicle lower end of the front pillar of the guide rail and stopping the slider at least until the webbing is attached to the slider when the slider is attached to the slider. Seat belt device.