JP3793793B2 - Seat belt retractor with pretensioner - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a seat belt retractor including a pretensioner that removes looseness of a seat belt by winding the seat belt around a retractor shaft in an emergency.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a seat belt device for safely holding a body of a vehicle occupant in a seat, there is a tendency that a retractor winds down the seat belt in order to reduce the occupant's feeling of wearing the seat belt. As a result, the slack of the seat belt mounted on the occupant's body increases, and therefore, when a large force is applied in an emergency such as a vehicle collision, the amount of the seat belt extending increases, and the occupant's body may not be effectively restrained. there were. Therefore, in order to remove the slack of the seat belt in an emergency, a seat belt retractor with a pretensioner that includes a pretensioner that instantaneously rotates the retracting shaft of the retractor in the winding direction is used.
[0003]
[Problems to be solved by the invention]
However, the conventional retractor for a seat belt with a pretensioner rotates the retracting shaft of the retractor instantaneously in the winding direction as taught in JP-A-6-156684 or JP-A-6-156187. Since the gas generator to be driven is arranged along the front-rear direction or the vertical direction of the vehicle, when a pin-type gas generator is used, the connector of the wire harness extending from the ignition control device is connected. The connector connection terminal provided in the gas generator faces the front-rear direction or the vertical direction of the vehicle. Further, the gas generator is disposed behind the body panel and the webbing as viewed from the indoor side. For this reason, there has been a problem that the work of connecting the connector of the ignition control device to the connector connection terminal of the gas generator becomes very troublesome.
[0004]
Accordingly, an object of the present invention is to eliminate the above-described problems, and a seat belt with a pretensioner that can easily connect a connector of a wire harness extending from an ignition control device to a connector connection terminal of a gas generator. Is to provide a tractor.
[0005]
[Means for Solving the Problems]
The above object of the present invention includes a retractor comprising a winding shaft of the webbing, and transmit rotational torque to the winding shaft by gas pressure generated from the gas generator when a vehicle collision, the winding shaft of the webbing In a retractor for a seat belt with a pretensioner that includes a pretensioner that rotates in a retracting direction, the pretensioner is disposed on a side wall that supports the take-up shaft of the retractor, and is built in the pretensioner. A connector connection terminal for connecting a wire harness connector extending from the ignition control device is provided at an end of the gas generator, and the retractor and the pretensioner are provided in a hole provided in a vehicle body. connector terminal, stores the indoor side direction memorial at positions displaced in the vehicle longitudinal direction of the webbing It can be achieved by the retractor for a seat belt pretensioner, characterized in that.
[0006]
This retractor for seat belt with pretensioner is a thing that obstructs work when connecting the connector of the wire harness extending from the ignition control device because the connector connection terminal of the gas generator faces the indoor side The connection work becomes very easy.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a seat belt retractor with a pretensioner according to the present invention will be described below with reference to the drawings.
1 is a front view of a retractor for a seat belt with a pretensioner according to the present invention, FIG. 2 is a view taken along an arrow A in FIG. 1, FIG. 3 is a sectional view taken along line III-III in FIG. It is a front view which shows the attachment state to the vehicle of the retractor for seatbelts with a tensioner.
[0008]
As shown in FIG. 1, a seat belt retractor 1 with a pretensioner according to the present invention includes a take-up reel 12 around which a webbing 11 is wound up or pulled out freely. The take-up reel 12 is always urged in the direction in which the webbing 11 is taken up by a take-up spring device 14 connected to the take-up shaft 13. If the webbing 11 is pulled out at an acceleration higher than a predetermined acceleration, the emergency lock mechanism 15 prevents the winding shaft 13 from rotating, and the webbing 11 is not pulled out any further.
[0009]
Further, the seat belt retractor 1 with the pretensioner rotates the winding shaft 13 in the direction in which the slack of the webbing 11 is removed on one base side wall 17 of the retractor base 16 formed in a substantially U shape. A pretensioner 18 is disposed.
The pretensioner 18 includes a gas generator 19, drive means 21 that transmits a rotational force to the take-up shaft 13 via a clutch mechanism (not shown), and a control device (not shown) that operates the gas generator 19 in the event of a vehicle collision. )).
[0010]
As shown in FIG. 3, the driving means 21 includes the main body 18 a. A rack 21a movably received in a cylinder 18c formed in the cylinder 18c and a pinion gear 21b meshed with the rack 21a are provided, and the pinion gear 21b is moved by the movement of the rack 21a by the gas pressure of the gas generator 19. And a rotational force is transmitted to the winding shaft 13 via a clutch mechanism (not shown).
[0011]
The gas generator 19 is a pin type, and as shown in FIG. 2, the connector 23 of the wire harness 22 extended from the ignition control device (not shown) on the automobile side is inserted. The connection part 24 is provided toward the indoor side.
In the seat belt retractor 1 with a pretensioner, when an extremely large deceleration occurs during a vehicle collision or the like, an ignition control device (not shown) detects this deceleration and ignites the gas generator 19. The ignited gas generator 19 generates gas, and this gas acts on the driving means 21 to rotate the winding shaft 13 so that the webbing 11 is wound by a predetermined length. Thereby, the slack of the webbing 11 is removed, and the passenger can be effectively restrained.
[0012]
Since the seat belt retractor 1 with a pretensioner connects the connector 23 of the wire harness 22 extending from the ignition control device as described above, the connector connection terminal 24 provided on the gas generator 19 is on the indoor side, that is, Since it faces in a direction substantially perpendicular to the traveling direction of the vehicle, there is no obstacle to the work when the connector 23 is connected, and the connection work becomes very easy.
As shown in FIG. 4, if a hole 31 is provided in the vehicle body 30 and the seat belt retractor 1 with a pretensioner is stored in the hole 31, when the connector 23 is inserted into the connector connecting portion 24, 30 and the webbing 11 are not interfered, and the connector 23 can be easily connected.
[0013]
【The invention's effect】
As described above, the retractor for a seat belt pretensioner of the present invention includes a retractor comprising a winding shaft of the webbing, rotation torque to the winding shaft by gas pressure generated from the gas generator to the vehicle collision A retractor for a seat belt with a pretensioner that includes a pretensioner that transmits and rotates the take-up shaft in the pull-in direction of the webbing, wherein the pretensioner is a side wall that supports the take-up shaft of the retractor A connector connection terminal for connecting a wire harness connector extending from an ignition control device is provided at an end of the gas generator built in the pretensioner, and the retractor and the pretensioner The connector connection terminal is inserted into the hole provided in the vehicle body. And it is characterized in that the stored indoor side direction memorial at positions displaced in the vehicle longitudinal direction of the ring.
[0014]
Therefore, according to the seat belt retractor with a pretensioner of the present invention, when connecting the connector of the ignition control device to the connector connection terminal of the gas generator, there is no obstacle to the work, and the connection work is very easy. become.
[Brief description of the drawings]
FIG. 1 is a front view of a seat belt retractor with a pretensioner according to the present invention.
FIG. 2 is a view taken in the direction of arrow A in FIG.
3 is a cross-sectional view taken along the line III-III in FIG.
FIG. 4 is a front view showing a state where the seat belt retractor with a pretensioner according to the present invention is attached to a vehicle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Seatbelt retractor with a pretensioner 11 Webbing 12 Winding reel 13 Winding shaft 14 Winding spring device 15 Emergency lock device 18 Pretensioner 19 Gas generator 21 Driving means 22 Wire harness 23 Connector 24 Connector connection terminal 30 Body 31 hole

Claims (1)

A retractor comprising a winding shaft of the webbing, and transmit rotational torque to the winding shaft by gas pressure generated from the gas generator when the vehicle collision, a pretensioner for rotating the winding shaft in the pull direction of the webbing In a retractor for a seat belt with a pretensioner comprising:
The pretensioner is disposed on a side wall that supports the winding shaft of the retractor;
At the end of the gas generator built in the pretensioner, a connector connection terminal for connecting a connector of a wire harness extending from the ignition control device is provided,
Said retractor and pretensioner, the hole formed in the body of the vehicle, the connector connection terminals, characterized in that stored the indoor side direction memorial at positions displaced in the vehicle longitudinal direction of the webbing pre Seat belt retractor with tensioner.

Images