JPS6039304Y2 - seat belt device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a seatbelt device that is capable of automatically moving restraint webbing toward and away from an occupant, and particularly relates to a seatbelt device that is designed to prevent forgetting to remove the ignition key. .

Various devices have been proposed to prevent forgetting to remove the ignition key when getting off the vehicle.

One type of such device is a device provided with a door opening/closing switch so that an alarm is activated when the door is opened while the ignition key is inserted into the key cylinder.

However, this device to prevent forgetting to remove the driver is not effective as many passengers ignore the warning.

Additionally, devices have been proposed that lock the door using a solenoid when the door is opened with the key inserted into the key cylinder, or conversely, devices designed to prevent users from forgetting to remove the door. If the door does not open, it will be extremely inconvenient when getting off the vehicle, and if the lock does not work, it may cause the vehicle to be stolen.

On the other hand, recent automobile seat belt devices have been proposed to drive the ends of the restraining webbing to move toward and away from the occupant as the occupant gets on and off, and to automatically attach and release the webbing, or assist in attaching and releasing the webbing. Therefore, it is an object of the present invention to provide a seat belt device that can reliably prevent forgetting to remove the ignition key by applying an ignition key forgetting prevention device to the seat belt device.

The seat belt device according to the present invention prevents the webbing from being driven when the ignition key is inserted into the key cylinder, thereby warning the occupant that he or she has forgotten to remove the key.

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a seatbelt device to which a first embodiment of the present invention is applied, in which an occupant restraint webbing 14 is attached diagonally to an occupant 12 seated on a seat 10. ing.

One inner end of the webbing 14 is wound onto a winding device 18 attached to the floor 16 in the approximate center of the vehicle.

This winding device 18 winds up the webbing 14 using a biasing force, and has an inertia lock mechanism built therein that abruptly stops unwinding the webbing 14 in case of a vehicle emergency.

On the other hand, one outer end of the webbing 14 is locked to an anchor plate 20, and this anchor plate 20 is connected to a guide rail 22 laid along the roof side of the vehicle.
You will be guided to move.

The guide rail 22 is fixed at its center to the roof side member 24, at its front end to the front pillar 26, and at its rear end to the center pillar 28 with mounting screws 30.

Therefore, when the anchor plate 20 is disposed at the rear end vertical portion of the guide rail 22 as shown by the solid line in FIG. The anchor plate 20 is not moved in the front-rear direction of the vehicle even when the anchor plate 20 is attached to the vehicle, and is moved toward the front of the vehicle along the guide rail 22 and attached to the front pillar 26 as shown by the two-dot chain line in FIG. When reaching the tip of the fixed guide rail 22, a space for the passenger 12 to get in and out is formed between the guide rail 22 and the seat 10.

On the other hand, at the bottom of the center pillar 28, as shown in FIG.
36 and is rotatably mounted, and is rotated by the driving force of a motor 38 fixed to the center pillar 28.

This sprocket 32 has an opening 42 in the flexible tape 40.
are in mesh with each other, and when the sprocket 32 is rotated by the driving force of the motor 38, the tape 40 is moved in its longitudinal direction.

The flexible tape 40 is adapted to move within a tape guide 44 that connects the sprocket housing 34 and the end of the guide rail 22, and its tip end is attached to the anchor plate 20.

Therefore, when the tape 40 is moved in the longitudinal direction, it generates a driving force that moves the anchor plate 20 along the guide rail 22.

A tape guide 46 for guiding the other end of the tape 40 is fixed to the sprocket housing 34.

As shown in FIG. 1, an ignition key 52 is inserted into a key cylinder 50 provided on the steering post 48 to start the engine.

As shown in the circuit diagram of FIG. 4, this key cylinder 50 has a built-in ignition key detection switch 54, which is opened when the key 52 is inserted.

The detection switch 54 can be a switch that has a contact that mechanically detects the insertion of a key, or a switch that electrically detects that the optical path is interrupted by the insertion of a key.

Also, this detection switch has one end connected to the limit switch 56 and relay 5B, and the other end connected to one end 66 of the door switch 64.
1, while the other end 68 of door switch 64 is connected in series to limit switch 62 and relay 60.

As shown in FIG. 1, the limit switches 56 and 62 are opened when the anchor plates 20, which are respectively attached to both ends of the guide rail 22, move forward or backward on the guide rail 22.

The door switch 64 is the ignition key detection switch 5
A contact 66 is connected to one contact of the limit switch 62, a contact 68 is connected to one contact of the limit switch 62, and a contact 72 is connected to the vehicle power source 70. When the vehicle door is opened, the contact 66 .72 is closed and the door is closed, contacts 68° and 72 are closed.

The intermediate portion of the relay 58 , 60 is grounded to be connected to the other end of the vehicle power source 70 , and the relay 58 , 60 corresponds to the motor reversal switching circuit 74 .

When the relay 58 is energized, the motor reversal switching circuit 74 rotates the motor 38 in the normal direction to move the anchor plate 20 to the first position.
The anchor plate 20 is moved from the solid line position to the two-dot chain line position in the figure, and when the relay 60 is energized, the motor 38 is reversed to move the anchor plate 20 from the two-dot chain line position to the solid line position. It has become.

Next, the operation of the first embodiment will be described. FIG. 1-2 shows a normal vehicle running state after the occupant 12 has already attached the webbing 14. The driving position can be changed arbitrarily by unrolling it.

Furthermore, in an emergency situation such as a vehicle collision, the inertia lock mechanism within the winding device 18 abruptly stops unwinding of the webbing 14, so the occupant 12 is restrained by the webbing 14 and his or her safety is guaranteed.

In this emergency, the anchor plate 20 will not move in the longitudinal direction of the vehicle, so the anchor plate 20 will not move inadvertently.
does not move along the guide rail 22.

Next, when the passenger opens the door to exit the vehicle and takes out the key 52 from the key cylinder 50 and opens the door, the fourth
In the figure, the contacts 66 and 72 of the door switch 64 are closed, and the ignition key detection switch 54 is similarly closed.

Also, the limit switch 56 is closed when the anchor plate 20 is in the solid line position in Figure 1, so the relay 56 is closed.
8 is excited and the motor 38 rotates forward.

Therefore, the anchor plate 20 moves from the solid line position in FIG. 1 to the front of the vehicle along the guide rail 22 and reaches the double-dashed line position in FIG.
As the E-36 stopped, a space for passengers to disembark was created.
Passengers can easily get off the vehicle.

However, if the occupant only opens the door but does not remove the key 52 from the key cylinder 50, the detection switch 54
Since the motor 38 is not closed, the motor 38 does not rotate.
The webbing 14 is not automatically released.

Therefore, in order for the occupant to exit the vehicle, extremely complicated operations such as moving the webbing 14 are required, which may cause the occupant to forget to remove the ignition key 52.

When the occupant closes the door after exiting the vehicle, the contacts 68 and 72 of the door switch 64 close, while the limit switch 62 remains closed, causing the motor 38 to rotate in reverse.

As a result, the anchor plate 20 moves to the solid line position in FIG. 1, and the limit switch 62 is opened, thereby stopping the motor 38.

When the occupant re-enters the vehicle, when the door is opened for the first time, the contacts 66 and 72 of the door switch 64 are closed, and since the ignition key detection switch 54 and limit switch 56 are closed, the relay 58 is energized and the motor is activated. 38 rotates forward.

As a result, the webbing 14 that had moved to the rear of the vehicle
moves to the position indicated by the two-dot chain line in FIG. 1, allowing the occupant to sit, and at the same time, the limit switch 56 is opened and the motor 38 is stopped.

If you close the door after sitting, the contact 68 of the door switch 64 will close.
Since limit switch 72 is closed and limit switch 62 is also closed, relay 60 is energized and motor 38 is reversed.

For this reason, the webbing 14 that had moved to the front of the vehicle was moved to the
The webbing is moved to the position shown by the solid line in the figure, and the occupant can actually wear the webbing regardless of whether the ignition key is operated.

Next, FIGS. 5 and 6 show a second embodiment of the present invention, in which an outer webbing 76 is provided in addition to the webbing 14, and unlike the previous embodiment, a motor is used. In addition, consideration has been made to provide a three-point seat belt system for the occupant, and an outer webbing 76 is attached to the vehicle door 78.

One end of the outer webbing 76 is an anchor plate 80
The other end of the outer webbing 76 is attached to the upper end of the door 78 via a kung plate 82 and an emergency release buckle device 84.

A through ring 86 is attached to the middle portion of the outer webbing 76 so as to be movable in the longitudinal direction of the webbing, and the tip of the webbing 14 is locked to this through ring δ6.

Further, the winding device 18 is fixed to the inner end of the sheet 10.

The intermediate portion of the outer webbing 76 between the through ring 86 and the anchor plate 80 is inserted into a guide ring 88 and folded back, and this guide ring 88 is inserted into the door 7
8 from the rear lower part of the door 78 to the front upper part, the outer webbing 76 is automatically brought into contact with and separated from the occupant 12 to be attached or released.

This guide ring 88 is a flexible tape 40 that is wrapped around a sprocket wheel 90, 92 that is pivotally supported within the door.
The sprocket wheel 90 is pivotally supported at the front upper part of the door 8, and the sprocket wheel 92 is pivotally supported at the rear lower part of the door 8.

A gear box 94 is provided at the lower front of the door 78, and a sprocket wheel 96 around which both ends of the flexible tape 40 are wound is pivotally supported.

Here, the flexible tape 40 is attached to the sprocket foils 90, 9.
It is preferable to use an endless loop wrapped around 2.96.

A bevel gear 98 is fixed to the sprocket wheel 96 and meshes with a bevel gear 100.

This bevel gear 100 is configured to rotate together with a pinion 102 that is coaxially attached to the pinion 102, and is provided with a spline coupling portion 104 that is movable relative to the pinion 102 in the axial direction.

The pinion 102 meshes with a sector gear 106, and is driven by the rotation of the sector gear 106 to rotate the bevel gear 100.

The sector gear 106 has a ball joint 108, a Danha-110,
The pin 11 is attached to a bracket 116 fixed to the vehicle body 114 via a door check 112 that regulates the opening/closing resistance force of the door.
It is pivotally supported via 8.

Therefore, when the door is opened, the sector gear 106 is pulled by the vehicle body 114, so it rotates and the pinion 106
2 and rotates the sprocket wheel 96 via the bevel gear 100.98, the tape 40 is driven, the guide ring 88 approaches the sprocket wheel 90, and the outer webbing 76 is pulled toward the front of the vehicle. When the door 78 is closed, it is rotated in the opposite direction to bring the webbing 76 closer to the seat 10 so that the seated occupant is automatically fitted with the webbing.

A solenoid 120 is connected to the bevel gear 100, and when the ignition key detection switch is opened, that is, when the ignition key is inserted into the key cylinder, the solenoid 120 is energized and the bevel gear 100 is rotated. direction, and separates from the pinion 102 and disengages from the bevel gear 98.

Therefore, in this embodiment, when the occupant pulls out the ignition key from the key cylinder 50 when exiting the vehicle, the opening force of the lower part is transmitted to the tape 40 via the bevel gear 98, and the outer webbing 76 is moved toward the front of the vehicle. The occupant can automatically release the webbing, but if the ignition key is still inserted into the key cylinder, the solenoid 120 is energized, causing the bevel gear 100 to separate from the door opening force 98. Since the information is not transmitted to the key 40, the occupant must manually remove the webbing, and as in the previous embodiment, it is possible to forget to remove the key.

In addition to the above, the present invention can be applied to various seatbelt devices that automatically attach and detach the webbing by moving the webbing toward and away from the occupant, and that assist in attaching and detaching the webbing.

The seat belt device according to the present invention described above is equipped with a switch that detects the state in which the ignition key has been forgotten to be removed from the key cylinder, and the webbing is not driven in the state in which the ignition key has been forgotten to be removed, so that the seat belt device according to the present invention can reliably provide the key to the occupant. It has an excellent effect of being able to warn you if you forget to remove it.

[Brief explanation of drawings]

FIG. 1 is a front view of a first embodiment of the seat belt device according to the present invention as seen from the side of the vehicle, FIG. 2 is a side view of FIG. 1, and FIG. 3 shows the flexible tape, drive sprocket, and 4 is a circuit diagram used in the first embodiment, FIG. 5 is a perspective view showing the second embodiment of the present invention, and FIG. 6 is a drive system shown in FIG. 5. FIG. 14... Webbing, 22... Guide ring, 38... Motor, 40... Flexible tape, 50... Key cylinder, 52...
...Ignition key, 54...Ignition key detection switch, 76...Outer webbing, 98,100...Bevel gear, 102
...Pinion, 106...Sector gear,
120...Solenoid.

Claims (1)

[Scope of utility model registration request] A switch that detects the insertion state of the ignition key into the key cylinder in a seat belt device that transmits driving force from a drive source to a part of the occupant restraint webbing and automatically moves the webbing towards and away from the occupant as the occupant gets on and off. M to a drive system of the webbing, and the webbing is not driven when a key is inserted into a key cylinder.