JPH0753500B2 - Seat belt outlet structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a structure of a seat belt outlet that is most suitable for a passive seat belt device that can be automatically worn by an occupant during riding.

(Prior Art) Conventionally, as a three-point seat belt device, for example,
The ones described in Japanese Patent Publication No. 55-92549 are known.

In this seat belt device, both ends of the first belt are supported above and below the rear end of the door, and a through ring through which the first belt is inserted is provided in an intermediate portion of the first belt. One end is fixed and this second
The other end of the belt is supported by a seat belt retractor provided at the center of the vehicle body floor by the retractor.

Therefore, when the door is opened, the second belt is pulled out, the occupant gets into the vehicle from the lower side of the second belt, and when the door is closed, the second belt is wound up. And moved to the state of being put on the occupant.

By the way, in such a conventional technique, when the occupant gets into the vehicle with the door open, the second
The belt is in a hung state, and then the second belt is wound and the first belt is attached,
If you do not take measures such as strengthening the winding force of the seat belt retractor, it will be difficult to get it in the correct wearing state.
There is a problem that the occupant feels uncomfortable because the restraint force on the occupant becomes too strong.

Therefore, as means for solving this problem, seat belt retractors are provided above and below the rear end of the door so that both ends of the seat belt are retracted by both retractors, and the central portion of the seat belt is removed from the vehicle body. A means to support it on the floor is conceivable.

According to this means, when the door is opened, both ends of the seat belt are extended from the center portion of the vehicle body floor toward the upper and lower portions of the door outside the vehicle, and the occupant can approach the vehicle from the lower side of the extended seat belt. Get in. In this way, the seat belt on the lower side is almost worn on the waist of the occupant, and the seat belt on the upper side is slanted from the waist on the center side of the vehicle to the shoulder on the outside of the occupant. It will be almost attached to the.

When the door is closed from this state, the outer side end of the seat belt is taken up by the take-up device and is properly worn by the occupant. Since the outer portion of the seat belt, which is an extra portion, is wound up, it operates reliably without a strong winding force.

Although the above-mentioned problems can be solved by such means, there are still problems to be solved.

(Problems to be Solved by the Invention) That is, the seat belt withdrawal opening of the seat belt retractor used in the above-mentioned means is disclosed in, for example, Japanese Patent Laid-Open No.
As indicated by reference numeral 14 in the drawing of Japanese Unexamined Patent Application Publication No. 6, the rectangular shape is slightly larger than the sectional shape of the seat belt.

Therefore, when the door is rotated when opening and closing the door, the seat belt withdrawal direction and the winding direction with respect to the seat belt outlet are changed, and the end surface of the seat belt rubs against the end surface of the seat belt outlet, and the seat belt is Hurt
The operation of the winding device may not be performed smoothly.

As a result, there is a possibility that the durability of the seatbelt device may be deteriorated or malfunction may occur.

SUMMARY OF THE INVENTION It is an object of the present invention to solve such a problem and to provide a seat belt withdrawal structure capable of smoothly withdrawing and retracting a seat belt in a seat belt retractor provided on a door.

(Means for Solving the Problems) In order to solve the above-described problems, the present invention provides a seat belt from the seat belt retractor provided therein to the inside of the vehicle at the lower rear end of the vehicle body. A seat belt outlet that is freely drawn and is formed of an elongated hole that is longer than the seat belt width is provided. An upper curved portion of an arc shape having a center at the vehicle front upper side position with respect to the seat belt outlet is formed at an upper end portion in the longitudinal direction of the seat belt outlet with an inclination with respect to the winding shaft. On the other hand, the lower end of the seat belt outlet in the longitudinal direction is formed with an arc-shaped lower curved portion having a center at a vehicle rear lower position with respect to the seat belt outlet. Of the outlet The upper and lower ends are provided with arc-shaped arc portions.

(Operation) In the seat belt outlet structure of the present invention, when the seat belt is pulled out and wound up,
If, due to the rotation of the door or the movement of the occupant wearing the belt, the pulling force or the retracting force in the longitudinal direction of the seat belt outlet is applied in addition to the normal retracting or retracting direction, become.

That is, the seat belt normally contacts the widthwise end face around the intermediate portion of the seat belt outlet in the pulled-out and wound-up state, and by the tensile force in the longitudinal direction of the seat belt outlet,
The seat belt outlet is moved in the longitudinal direction along the end face in the width direction.

Therefore, when the seat belt moves upward in the longitudinal direction and moves to the position of the upper curved portion, a contact reaction force is generated in the seat belt in a direction corresponding to the curvature of the curved portion. Since the center of the seat belt is located above the seat belt outlet in the front side of the vehicle, the contact reaction force is generated in the rearward and downward direction of the vehicle and acts to return the seat belt toward the center of the seat belt outlet. Is restricted, that is, the seat belt is restricted from moving above the center of the arc of the upper curved portion. Further, when the seat belt moves downward in the longitudinal direction to the position of the lower curved portion, the arc center of the lower curved portion is arranged on the vehicle rear lower side with respect to the seat belt outlet. Therefore, the direction of the contact reaction force generated corresponding to this curvature is
It acts so as to return to the center of the seat belt outlet at the upper front of the vehicle, and the downward movement of the seat belt is restricted.

Therefore, the movement of the seat belt from the curved portion toward the end portion is restricted, and the movement amount of the seat belt with respect to the seat belt outlet can be reduced.

Further, since arcuate portions are provided at both ends of the seat belt outlet, if the seat belt moves to this end due to a weak contact force with respect to the seat belt outlet, etc. The end portion bends along the arc shape of the arc portion, and the seat belt end surface does not rub against the arc portion of the seat belt outlet.

Therefore, the end surface of the seat belt is not scratched by rubbing against the seat belt outlet.

(Examples) Hereinafter, examples of the present invention will be described in detail with reference to the drawings. In the description of this embodiment, a case where the present invention is applied to a seat belt device provided in a passenger seat will be taken as an example.

First, the configuration of the embodiment will be described.

FIG. 2 is a perspective view of the structure of a seatbelt device to which the seatbelt outlet of one embodiment of the present invention is applied, as viewed obliquely from the rear of the vehicle, and 101 indicates a door on the passenger seat 102 side. . The door 101 is provided so that the opening 103 can be opened and closed by rotating around the front end of the vehicle body 100.

A central winding device 1 and a lower winding device 2 are provided at the center and the lower part of the rear end of the door 101, respectively.
Both winding devices 1 and 2 are generally E, L, R (EMERGENCY LOCKI
It is called NG RETRACTOR) and has a structure in which the seat belt 3 is biased by a spring force in the direction in which the seat belt 3 is wound up, and the drawer of the seat belt 3 is locked when the seat belt 3 is suddenly pulled out or the vehicle decelerates suddenly. is there.

The seat belt 3 is supported with one end thereof being wound by the central winding device 1, and the intermediate portion side thereof is fixed to the sash upper portion of the rear end of the door 101. It was supported by the ring 41 in the inserted state, and was supported by the central portion of the vehicle body floor 104 with the intermediate portion inserted by the second through ring 42, and the other end portion was wound by the lower winding device 2. Supported by the state.

The second through ring 42 can be attached to and detached from a buckle member 105 attached to a vehicle body floor 104 having a tongue (not shown) formed therein.

Both winding devices 1 and 2 show the lower winding device 2 in FIG.
As shown in (III-III cross section in the figure), the case 21 is housed in the case 21 by a dish-shaped bracket 22.
It is attached to the inner panel 106 of 1. The inner side of the inner panel 106 and the bracket 22 is covered with a resin trim 5 (see FIGS. 2 and 3). In addition, 2 in the figure
3 indicates a winding shaft.

A central portion 221 of the bracket 22 is slightly inclined toward the rear of the vehicle body, and an opening portion 222 for withdrawing a seat belt is formed in the central portion 221. Further, a resin protector 6 is fixed to the opening portion 222. Has been done.

In this protector 6, the seat belt 3 has an opening 222.
As shown in FIG. 1, it has a substantially square plate shape, and a seat belt outlet 61 of one embodiment of the present invention is formed at a substantially central portion thereof so as not to rub against the edge portion of the seat belt. Incidentally, FIG. 1 is a view as seen from an arrow A in FIG. 2 in which the finisher 7 described later is omitted.

Further, as shown in FIG. 3, a finisher 7 is provided on the vehicle compartment side of the protector 6 to cover a gap between the peripheral portion of the protector 6 and the opening 51 of the trim 5.

The seat belt outlet 61 is formed as a narrow elongated hole. The seat belt outlet 61 is provided with a linear portion 611 formed in a straight line at the center thereof.
In order to prevent a large twist between the seat belt 3 and the occupant's waist, the upper side of the seat belt 3 is tilted toward the rear of the vehicle so that the seat belt 3 is approximately 30 ° with respect to the vertical line. It is formed in a gradually inclined shape.

An upper curved portion 612 and a lower curved portion 613 formed by an arc having a radius substantially equal to the width of the seat belt 3 are provided on both upper and lower sides of the linear portion 611, and further, both ends of the seat belt outlet 61 are Circular arc portions 614, 615 formed in an arc shape having a diameter equal to the width of the elongated hole of the seat belt outlet 61 are provided. As shown in the figure, the upper curved portion 612 is formed in an arc shape in which the center of the circular arc is arranged in the upper front of the vehicle with respect to the seat belt outlet 61, while the lower curved portion 612 is formed.
As shown in the figure, the center of the arc of the 613 is the seat belt outlet 61.
On the other hand, it is formed in an arc shape which is arranged on the lower rear side of the vehicle.

The peripheral portion of the seat belt outlet 6 is formed so as not to be damaged even if it is rubbed against the back surface 32 or the abdominal surface 33 of the seat belt 3.

Further, the seat belt withdrawal opening for the central winding device 1 has the same linear structure as the conventional one.

Next, the operation of the embodiment will be described.

In this seat belt device, when the door 101 is opened, the seat belt 3 is pulled out as shown in FIG. And
When the occupant gets into the vehicle from the lower side of the seat belt 3 and sits in the passenger seat 102, at that point, the lower seat belt 3
Is in a state of being worn from the vehicle center side to the upper side of the occupant's waist, and the upper seat belt 3 is being worn from the waist of the occupant in the vehicle center side to the chest outside the vehicle.

When the door 101 is closed, both ends of the seatbelt 3 move into the vehicle interior while moving rearward of the door 101 toward the rear of the vehicle body. When the seat belt 3 is wound around the seat belt 2 and the door 101 is completely closed, the seat belt 3 is properly worn.

By the way, when the seat belt 3 is pulled out and wound up with the opening and closing of the door 101 as described above, the seat belt 3 is pulled out due to the difference in the physique of the occupant.
It may be pulled upward or downward with respect to 61, but in that case, it acts as follows.

That is, since the door 101 is rotated forward of the vehicle body, the back surface 32 of the seat belt 3 is brought into contact with the edge portion of the seat belt outlet 61 as shown in FIG.

Therefore, when the seat belt 3 is further pulled upward, it moves upward with the back surface 32 in contact with the edge portion as shown in the figure, but when the seat belt 3 moves to the upper curved portion 612, the seat belt 3 moves upward. A reaction force generated by contacting the curved portion 612 is generated according to this curvature, and the movement of the seat belt 3 is restricted at a position where the reaction force is balanced. That is, the upward movement of the seat belt 3 and the central position of the upper curved portion 612 are restricted.

Therefore, the seat belt 3 is less likely to move above the upper curved portion 612, and therefore the end surface of the seat belt 3 and the end portion of the seat belt outlet 61 are less likely to rub against each other.

Further, if the reaction force generated between the seat belt 3 and the seat belt outlet 61 is small, the seat belt 3 is bent upward.
When the seat belt 3 is moved above 612, the end portion of the seat belt 3 is deformed along the arc portion 614 because the arc portion 614 is provided at the upper end portion of the seat belt outlet 61 (first portion). The end surface of the seat belt 3 does not rub against the seat belt outlet 61, as indicated by the imaginary line a in the figure).

Note that, even when the seat belt 3 is pulled downward, the same effect can be obtained by the lower curved portion 613 and the circular arc portion 615, and a description thereof will be omitted.

Therefore, even if the seatbelt 3 is pulled up and down, the end surface of the seatbelt 3 does not rub against the seatbelt outlet 61 and is not damaged, which does not reduce the durability. There is little vertical swing of the seat belt 3 at the time, and the effect that the lower winding device 2 does not malfunction is obtained.

(Effects of the Invention) As described above, in the seat belt outlet structure of the present invention, since the movement amount of the seat belt in the seat belt outlet in the longitudinal direction can be reduced, the seat belt outlet By shortening the length, it is possible to reduce the swing width of the seat belt at this position, and thus it is possible to obtain an effect that the action of the seat belt retractor can be made smooth. Along with that, the end surface of the seat belt is less likely to rub against the end portion of the seat belt outlet, and the end surface of the seat belt can be less likely to be scratched,
As a result, the effect of improving durability and reliability can be obtained.

Furthermore, by providing arcuate portions at both ends of the seat belt outlet, even if the seat belt moves to this arcuate portion,
Since the end surface of the seat belt does not rub against the circular arc portion, this also brings about an effect that the end surface of the seat belt is less likely to be damaged and durability and reliability are improved.

[Brief description of drawings]

FIG. 1 is a view of the seat belt entrance / exit structure of the embodiment of the present invention when the finisher is omitted, as viewed from the direction of arrow A in FIG. 2, and FIG. 2 is a seat to which the seat belt outlet of the embodiment of the present invention is applied. FIG. 3 is a perspective view showing the structure of the belt device as seen obliquely from the rear of the vehicle, and FIG. 3 is a cross-sectional view showing the lower winding device (of FIG. 2).
III-III cross section). 2 ...... Lower winding device 3 ...... Seat belt 61 ...... Seat belt outlet 612 ...... Upper curved part 613 ...... Lower curved part 614 ...... Arc part 615 ...... Arc part

Claims (1)

[Claims] 1. A seat formed at a lower portion of an ad rear end of a vehicle body by a long hole having a total length longer than a seat belt width so that a seat belt can be pulled out from a seat belt retractor provided therein to the inside of a vehicle. A belt outlet is provided, and the seatbelt outlet is formed such that its longitudinal direction is inclined with respect to the winding shaft of the seatbelt retractor so that the seatbelt outlet faces upward in the rearward direction of the vehicle. An arcuate upper curved portion having a center at the vehicle front upper side position with respect to the seat belt outlet is formed at the upper end in the longitudinal direction, while at the lower end in the longitudinal direction of the seat belt outlet, the upper curved portion is formed. Is formed with an arc-shaped lower curved portion having a center at a vehicle rear lower position with respect to the seat belt outlet, and arc-shaped arc portions formed at upper and lower ends of the seat belt outlet. Is provided The belt-withdrawing outlet structure, characterized in that there.