JPS5851087Y2 - Passive seat belt device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a passive seat belt device that is installed to protect the occupants of automobiles and the like.

In recent years, a passive seatbelt device has been developed that automatically tightens and releases the seatbelt regardless of the occupant's will, with the aim of increasing the rate of occupants wearing their seatbelts and reducing injuries to occupants in the event of a collision. has been done.

Conventional passive seat belt devices are usually seat belts)
One end of the seat belt is fixed to the vehicle body (floor or a member fixed to the floor, etc.) under the armpit on the center side of the seat via an anchor or a tractor, and the other end of the seat belt is attached to the vehicle body side, such as a sight rail, across the seat. The seatbelt is attached to the front seat via a retractor, and when the door is opened, the drive device is activated to pull the seatbelt forward along the sight rail and close the seatbelt in the released state.
When the door is closed, the drive device operates in the opposite direction so that the seat belt is wound around the tractor and fitted around the body of the seated occupant.

There is also a seatbelt in which the outer end of the seatbelt is attached to the rear of the door, and when the door is opened, the outer end joint of the seatbelt moves from the outside to the front to release the seatbelt.

As mentioned above, in any case, the conventional passive seat belt device releases and fastens the seat belt by moving the outer side of the seat belt, that is, the door side part, in the front and rear directions as the door opens and closes. )v) The joint at the lower armpit on the center side of the seat is usually simply fixed.

In conventional systems, when the seatbelt is activated, the center part of the seatbelt remains fitted to the waist of the seated occupant in the center, and when the seatbelt is released and fastened, the seatbelt is pulled out or entangled while rubbing against the passenger's central waist area,
This is extremely inconvenient because not only does this cause extreme discomfort to the occupant, but in some cases, a portion of the occupant's clothing may be pulled in, preventing the seat belt from being properly fastened.

Furthermore, if the seated occupant is not in a normal posture when the seatbelt is fastened, there may be problems such as the seatbelt tightening the occupant's elbows and the like.

The present invention is intended to solve the above-mentioned problems of the conventional passive seat belt device, and will be described below with reference to the accompanying drawings.

1 and 2 show an embodiment of the present invention, in which 1 is a seat belt, 2 is a retractor, and the seat belt 1 is a retractor.
One end is attached to the vehicle body member (floor or a member fixed to the floor, etc.) at the rear lower part of the center side of the seat 3 via the retractor 2, and the other end is attached to the window layer of the door 4 by straddling the seat 3. The seat belt 1 is connected to a window frame 4a in the upper rear part, and is configured so that when the door is closed, the seat belt 1 is fastened across the seat from one shoulder to the other waist of a seated occupant.

In the case of a sash-less door without a window frame 4a, the outer end of the seat belt 1 is coupled to a belt support portion that projects upwardly from the rear of the window layer of the sash-less door.

Reference numeral 5 denotes a belt guide member consisting of a lower member 5a and an upper member 5b coupled to the upper end of the lower member 5a so as to be rotatable forward about a shaft 5c. The lower end of the lower member 5a is rotatably pivoted to a bracket 8 fixed to the central side surface of the lower member 3a,
The belt 1 is attached to the upper end of the upper member 5b of the belt guide member 5.
The lower member 5a and the upper member 5b are held in a fixed positional relationship as shown by the solid line in FIG. 1, for example, in a linearly connected state, by a spring 5d.

The belt guide member 5 extends along the side surface of the seat cushion 3a so that the through hole 6 at the tip extends along the side surface of the seat cushion 3a.
From the seat belt fastening position located at the rear side of the
-6 can be rotated to a release position located at the front of the seat cushion 3a.

Further, the belt guide member 5 is biased by a spring 7 in a direction to rotate to the belt fastening position.

Reference numeral 9 denotes a handbrake operating member, and the handbrake operating member 9 and the lower member 5a of the belt guide member 5 are connected by a cable 10. When the handbrake operating member 9 is operated to apply the brake, the By operation, the belt guide member 5 is pulled by the cable 10, and the lower member 5a,
The upper member 5b remains in the state shown by the solid line and rotates forward from the belt fastening position shown by the solid line to the belt release position shown by the solid line in FIG. 2, and when the handbrake is released, the cable 10 Loosen belt guide member 5
is returned to the original belt fastening position by a spring 7.

In the above configuration, while the vehicle is running, the handbrake is naturally in the released state, so the belt guide member 5 is in the rear belt fastening position, and the seat belt 1 is in the fastened state by passing from one shoulder to the waist of the occupant. There is.

When exiting the vehicle, the passenger first applies the handbrake.

Then, the belt guide member 5 is pulled forward and rotated via the cable 10, and guides the central portion of the seat belt 1 forward from the state shown by the chain line in FIG. Hold the belt in the remote release position.

Next, when the door is opened, the end of the seat belt 1 on the door side moves forward from the outside, and the seat belt is completely released as shown by the solid line in FIG. 2, allowing the occupant to get in and out of the vehicle freely.

When the seatbelt 1 moves from the outside of the door side end to the front, the seatbelt 1 is pulled out from the IJ tractor 2, but the central portion of the seatbelt 1 is connected to the belt guide member 5 and the through hole 6. Since the seat belt is held in a forward position away from the occupant's waist, there is no possibility that the seat belt will rub against the occupant's waist, and as shown in the second chain line A, the center part of the seat belt is Compared to the conventional model that does not move forward, the present invention, which is moved forward a further t, can secure a considerably larger space for getting on and off, and can significantly improve the ease of getting on and off.

When the occupant is seated in the vehicle and the door is closed, the door-side connecting portion of the belt 1 is located slightly behind the occupant's shoulder, and the seat belt 1 is positioned slightly behind the occupant's shoulder.
is caught in the retractor 2, but even at this time, the belt 1 is still held in the forward release position by the belt guide member 5 and the through hole 6, so that it does not rub the waist or pull in the clothes.

When the handbrake is released when starting after closing the door, the belt guide member 5 is rotated backward by the spring 7.
The seat belt 1 is completely fastened.

When the seat belt is fastened as described above, if the occupant's seating posture is not in a normal state and a predetermined load is applied to the seat belt 1 due to, for example, the occupant's elbow getting caught in the belt, the upper member 5b As shown by the chain line in FIG. 1, the belt rotates forward against the spring 5d, thereby alleviating the belt fastening impact on the occupant and significantly improving the seatbelt fastening feeling.

If, for example, an elbow or the like is removed from the seatbelt 1 from the state shown by the chain line in FIG. 1, the upper member 5b returns to the normal position indicated by the solid line by the spring 5d, and the seatbelt is fastened in a normal posture.

The operation of the belt guide member 5 during the tightening and unfastening operation of the seat belt 1 as described above is such that the belt guide member 5 is attached to the seat cushion 3a, so that the position of the seat 3 is adjusted in the longitudinal direction. The relative relationship of the belt guide member 5 to the seat 3 does not change even if the belt guide member 5 is adjusted to the seat 3, and the central portion of the seat belt 1 can be accurately held in the fastening position and the releasing position at any adjustment position of the seat 3. .

In the illustrated embodiment, an arm that rotates in the front-rear direction is used as the belt guide member 5, but in other cases, for example, a guide rail may be provided in the front-rear direction on the side surface of the center side of the seat cushion 3a, and a guide rail may be provided at the tip of the guide rail. The belt guide member provided with a through hole may be fitted so as to be slidable, and the belt guide member may be configured to move to the rear fastening position while being guided by the guide rail.

In the first and second illustrated embodiments, the present invention is applied to a seat belt device in which the outer end of the seat belt 1 is attached to the door 4. A guide mechanism such as a rail attached to a side member of the vehicle body such as a sight rail and provided facing forward on the side member of the vehicle body is used to move the outer part of the seat belt 1 in the front and rear directions in response to opening and closing of the door. The present invention is also applicable to a seatbelt device having a seatbelt system, and the fixing structure and movable structure of the outer end of the seatbelt can be of any configuration.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being a side view of the main parts, and Figure 2 being an explanatory plan view of the seat belt in the released state. 1... Seat belt, 2... Retractor, 3... Seat, 3a... Seat cushion, 4... Door, 5... ...Belt guide member, 5a...Lower member, 5b...
・Upper member, 5d...Spring, 6...
...Through, 7...Spring, 9...
・Handbrake operating member, 10... Cable.

Claims (1)

[Scope of utility model registration request] The end of the seat belt on the center side of the vehicle body is attached via a retractor to the vehicle body member at the rear of the center side of the seat via a retractor. A belt guide member consisting of an upper member having a through hole for inserting and guiding the seat belt at the tip thereof and a spring energized to hold the upper member in a fixed position rearward with respect to the lower member. Attach the seat belt to the side surface of the seat on the vehicle center side so that the vehicle center side portion of the seat belt inserted through the through hole can be moved from a belt fastening position that fits around the passenger's waist to a belt release position in the front away from the passenger's waist. , the lower member of the belt guide member is interlocked with the handbrake operating member, so that when the handbrake is applied, the belt guide member operates to the belt release position, and when the handbrake is released, the belt guide member operates to the belt fastening position. Passive seatbe #) device characterized by: