JPH01195157A - Outline structure of seat belt - Google Patents

Abstract

PURPOSE:To minimize the travel of a belt in the longitudinal direction of an elongated hole and to accomplish smooth operation of a winder by forming curved portions at both end portions in the longitudinal direction of the elongated bole of an outlet for a passive seat belt, which is disposed at the lower portion of a door, and forming a circular arc portion at both ends of the outlet. CONSTITUTION:A passive seat belt includes winders for the seat belt, disposed at the upper and lower portions of a door to freely take up the seat belt, wherein the middle portion of the belt is supported by a car body floor, and an outlet 61 for guiding the seat belt 3 is provided on the winder 2 disposed at the lower portion of the door. The outlet 61 has a linear portion 611 inclined about 30 deg. with respect to the vertical line not to cause a large twisting when the belt is installed at the waist of a crew, curved portions 612, 613 formed at both end portions thereof in the longitudinal direction and circular arc portions 614, 615 formed at both ends thereof. At the time of drawing out the belt, the travel of the belt in the longitudinal direction of an elongated hole of the outlet is minimized to prevent the belt from being caught by both end portions of the elongated hole, so that the winder can be smoothly operated.

Description

DETAILED DESCRIPTION OF THE INVENTION - (Industrial Application Field) The present invention relates to a structure of a seatbelt outlet that is most suitable for a passive seatbelt device that can be automatically attached to an occupant when riding a vehicle.

(Prior Art) Conventionally, as a three-point seat belt device, for example, one described in Japanese Utility Model Application Publication No. 55-92549 is known.

In this seat belt device, both ends of the first belt are supported above and below the rear end of the door, a through ring through which the first belt is inserted is provided in the middle part of the first belt, and a through ring is provided with the second belt through the through ring. One end is fixed and this second
The other end of the belt was supported in a wound state by a seat belt retractor provided in the center of the vehicle floor.

Therefore, when the door is opened, the second belt is pulled out, and the occupant enters the vehicle from under the second belt. When the door is closed, the second belt is wound up, and the first belt is placed around the occupant's waist and shoulders. The device moved toward the vehicle and was attached to the passenger.

By the way, in such conventional technology, when the door is opened and the passenger gets into the vehicle, the second
The belt is in a hung state, and then this second belt is wound up and the first belt is attached.
If you do not take measures such as increasing the retracting force of the seatbelt retractor, it will be difficult for the seat belt to be properly worn.
There has been a problem in that the restraining force on the occupant becomes too strong, causing the occupant to feel uncomfortable.

Therefore, as a means to solve this problem, seatbelt retractors are installed above and below the rear end of the door, and both ends of the seatbelt are retracted by both retractors. A possible method is to support it on the floor.

According to this method, when the door is opened, both ends of the seat belt extend from the center of the vehicle body floor toward the top and bottom of the door outside the vehicle, and the occupant enters the vehicle from the underside of the extended seat belt. Get in. When the passenger gets into the vehicle in this manner, the lower seat belt is almost attached to the passenger's waist, and the upper seat belt extends diagonally from the waist in the center of the vehicle to the passenger's shoulder on the outside of the vehicle. It is almost installed.

From this state, when the door is closed, the outer end of the seat belt is wound up by the retractor, and the seat belt is properly attached to the occupant. Since the excess portion of the seat belt on the outside of the vehicle is wound up, the system can operate reliably even without a strong winding force.

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

(Problem to be Solved by the Invention) That is, the seatbelt outlet of the seatbelt retractor used in the above-mentioned means is disclosed in, for example, Japanese Patent Laid-Open No. 52-5
As shown by 14 in the figure of Publication No. 3326, it simply had a rectangular shape slightly larger than the cross-sectional shape of the seat belt.

For this reason, when the door is rotated when opening and closing, the pull-out direction and winding direction of the seatbelt relative to the seatbelt outlet change, causing the end face of the seatbelt to rub against the end face of the seatbelt outlet, causing the seatbelt to tighten. Get hurt or
The winding device may not operate smoothly.

As a result, there is a risk that the durability of the seat belt device may be reduced or malfunction may occur.

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and provide a seatbelt outlet structure that allows smooth withdrawal and retraction of the seatbelt in a seatbelt retractor installed in a door.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention includes a seatbelt retractor provided at the door of a vehicle body, and a seat belt retractor that extends the seatbelt from the seatbelt retractor to the inside of the vehicle. A seatbelt outlet consisting of an elongated hole formed to allow the seatbelt to be freely pulled out, and at both ends of the seatbelt outlet in the longitudinal direction, a curved hole is formed by extending the elongated hole in the direction of both ends of the longitudinal direction. A portion is provided at both ends of the seat belt outlet in the longitudinal direction.
circle? The means is provided with an arcuate portion formed in a scoop shape.

(Function) In the seatbelt drawer structure of the present invention, when the seatbelt is pulled out and retracted, the seat and belt may be removed from the normal drawer due to, for example, the rotation of the door or the movement of the occupant wearing the belt. When a pulling force or a winding force is applied in the longitudinal direction of the seat belt outlet in addition to the zero winding direction, the following occurs.

That is, the seat belt normally contacts the widthwise end surface around the middle part of the seat belt outlet when the seat belt is rolled up, and due to the tensile force in the longitudinal direction of the seat belt outlet,
The seat belt outlet is moved in the longitudinal direction along this widthwise end face.

Therefore, when the seatbelt moves to the curved part, a contact reaction force is generated in the seatbelt in a direction corresponding to the curvature of the curved part, and the seatbelt moves to a position where the contact reaction force is balanced, and from this position it moves longitudinally. Movement in this direction is restricted. By the way, if the shape of the curved part is a circular arc shape with a single center.

The seat belt is arranged at a position where its center coincides with the center position of the circular arc, and movement from this position is restricted.

Therefore, the movement of the seatbelt from the curved portion to the end side is restricted, and the amount of movement of the seatbelt relative to the seatbelt outlet can be reduced.

In addition, since arcuate parts are provided at both ends of the seatbelt outlet, if the seatbelt moves to this end due to weak contact force with the seatbelt outlet, the seatbelt ends The portion is bent along the circular arc shape of the circular arc portion, so that the end surface of the seat belt does not rub against the circular arc portion of the seat belt outlet.

Therefore, the end surface of the seat belt will not be damaged by rubbing against the seat belt outlet.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In describing this embodiment, an example will be taken in which the present invention is applied to a seat belt device provided in a passenger seat.

First, the configuration of the embodiment will be explained.

FIG. 2 is a perspective view of the configuration of a seat belt device to which a seat belt outlet according to an embodiment of the present invention is applied, as viewed diagonally from the rear of the vehicle, and 101 indicates a door on the passenger seat 102 side. . The door lO1 is provided in the vehicle body 100 so that it can rotate around its front end to open and close an opening 103.

A central winding device 1 and a lower winding device 2 are provided at the center and bottom of the rear end of the door 101, respectively. Both winding devices 1.2 are generally E-L-R (EME
RGENCY LOCKING RETRACTO
R), which is biased in the direction of retracting the seat belt 3 by a spring force, and has a structure that locks the seat belt 3 from being pulled out suddenly or when the vehicle suddenly decelerates. .

The seat belt 3 is supported with one end being wound up by a central winding device l, and the intermediate portion thereof is supported by a first sash fixed to the upper part of a sash at the rear end of the door 101.
The vehicle body floor 1 is supported in a state where it is inserted through the through ring 41 and in a state where the intermediate part is inserted through the second through ring 42.
04, and is further supported in a wound state by the lower winding device 2 at the other end.

A tank (not shown) is formed in the second through ring 42 and is detachable from a buckle member 105 attached to the vehicle floor 104.

Both winding devices 1.2 are connected to the case 2, as shown in FIG. 3 (III-III cross section in FIG. 2) showing the lower winding device 2.
1, and this case 21 is housed in a dish-shaped bracket 2.
2 to the inner panel 106 of the door 101. Further, the interior side of the inner panel 106 and the bracket 22 are covered with a resin trim 5 (see Fig. 2.3).

Note that 23 in the figure 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 222 for drawing out the seat belt is formed in this central portion 221.
A resin protector 6 is fixed to 22.

In this protector 6, the seat belt 3 has an opening 22.
As shown in FIG. 1, it has a substantially square plate shape, and a seatbelt outlet 61 according to an embodiment of the present invention is formed substantially in the center thereof. Furthermore, the first
The figure is a view taken along arrow A in FIG. 2 with the finisher 7 described later omitted.

Moreover, as shown in FIG.
A finisher 7 is provided to cover the gap between the two.

The seat belt outlet 61 is formed of a thin elongated hole. The seat belt outlet 61 is provided with a straight part 611 formed in a straight line in the center, and when the seat belt 3 is worn around the passenger's waist, In order to prevent large torsions from occurring between the two, the upper side is formed in a shape inclined at approximately 30 degrees with respect to the vertical line so that the upper side is tilted toward the rear of the vehicle.

On both upper and lower sides of this straight portion 611, upper curved portions 612 are formed with circular arcs having a radius approximately equal to the width of the seat belt 3.
Further, both ends of the seat belt outlet 61 are provided with a circular arc portion 6 having a diameter equal to the width of the elongated hole of the seat belt outlet 61.
14.615 is provided.

The peripheral edge of the seat belt outlet 6 is rounded and is formed so as not to be damaged even if it rubs against the back surface 32 or the vent surface 33 of the seat belt 3.

Further, the seat belt outlet for the central retractor l has a linear structure similar to the conventional one.

Next, the operation of the embodiment will be explained.

In this seat belt device, when the door IO1 is opened, the seat belt 3 is pulled out as shown in FIG. When the occupant enters the vehicle from below the seat belt 3 and sits in the passenger seat 102, at that point the lower seat belt 3 is attached to the occupant's waist from the center of the vehicle to the upper side, and , the upper seat belt 3 is attached from the passenger's waist on the center side of the vehicle to the chest on the outside of the vehicle.

When the door 101 is closed, both ends of the seat belt 3 move toward the vehicle interior while moving toward the rear of the vehicle body together with the rear end of the door 101. .2, the seat belt 3 is properly fastened with the door 101 completely closed.

By the way, when the seatbelt 3 is wound up in the drawer 9 when the door 101 is opened and closed as described above, the seatbelt 3 may be pulled upwardly with respect to the seatbelt drawer opening 61 due to differences in the physique of the occupants. In this case, the action is as follows.

That is, since the door 101 is rotated forward of the vehicle body, the back surface 31 of the seat belt 3 comes into contact with the edge of the seat belt outlet 61, as shown in FIG.

So, if it is pulled further upwards.

As shown in the figure, the back surface 31 moves upward while contacting the edge, but when the seat belt 3 moves to the upper curved portion 612, the reaction force generated by the seat belt 3 contacting the upper curved portion 612 is Movement of the seat belt 3 is restricted at a position where this reaction force is generated in accordance with this curvature and is balanced.

That is, the center position of the seat belt 3 and the upper curved portion 612
A balance of reaction forces is obtained at a position where the central position of

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

Moreover, if the reaction force generated between the seat belt 3 and the seat belt outlet 61 is small and the seat belt 3 moves upwards than the upper curved part 612, the upper end of the seat belt outlet 61 Since the arcuate portion 614 is provided, the end of the seatbelt 3 is deformed along the arcuate portion 614 (as shown by the imaginary line a in FIG. They never rub against each other.

Note that even when the seat belt 3 is pulled downward, the lower curved portion 612 and the arcuate portion 615 provide the same effect, so the explanation will be omitted.

Therefore, even if the seat belt 3 is pulled up and down, the end surface of the seat belt 3 will not rub against the seat belt outlet 61 and be damaged, and there will be no decrease in durability due to this. seat belt 3
It is possible to obtain the effect that the vertical vibration of the winding device 2 is small and malfunction does not occur in the lower winding device 2.

Although one embodiment of the present invention has been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment. I showed that.

It may be applied to other places such as pillars, that is, to any part where the seat belt is pulled out and where the seat belt is pulled out in a swaying direction.

(Effects of the Invention) As explained above, in the seatbelt outlet structure of the present invention, the amount of movement of the seatbelt in the longitudinal direction at the seatbelt outlet can be reduced. By shortening the length, it is possible to reduce the swing width of the seat belt at this position, which has the effect of smoothing the operation of the seat belt retractor. At the same time, the end surface of the seat belt is less likely to rub against the end of the seat belt outlet, and the end surface of the seat belt is less likely to be damaged.
This provides the effect of improving durability and reliability.

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

[Brief explanation of the drawing]

FIG. 1 is a view taken along arrow A in FIG. 2 with the finisher omitted, showing the seatbelt entrance/exit structure according to an embodiment of the present invention; FIG. FIG. 3 is a perspective view showing the configuration of the belt device as seen diagonally from the rear of the vehicle, and FIG. 3 is a sectional view (cross section Ill-III in FIG. 2) showing the lower winding device. 2...-Lower winding device 3--Seat belt 61-Seat belt outlet 612...Upper curved part 613...Lower curved part 614...Circular arc part 615...Circular arc part

Claims (1)

[Scope of Claims] 1) A seatbelt retractor is provided at the door of the vehicle body, and the seatbelt drawer is a seatbelt outlet consisting of an elongated hole formed so that the seatbelt can be freely drawn out from the seatbelt retractor to the inside of the vehicle. A curved portion formed by extending and curving a long hole toward both longitudinal ends of the seat belt outlet is provided at both longitudinal ends of the seat belt outlet. The seat belt outlet structure is characterized by being provided with a circular arc portion formed in a circular arc shape.