JPH031178B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Field of Industrial Application The present invention relates to a seat belt device installed in a seat arranged in a vehicle, particularly in a vehicle interior of an automobile.

(2) Conventional technology Conventionally, a reach arm is pivotally supported on one side of a seat in a vehicle interior so that it can swing back and forth, and a seat belt that is fed out from a retractor is tied to the tip of this reach arm. A seatbelt device which, when in use, swings the reach arm forward to guide the seatbelt to the hand of the occupant on the seat to make it easier to fasten the seatbelt, is disclosed in, for example, Japanese Patent Laid-Open No. 48-94120. It is known in the publication No.

(3) Problems to be solved by the invention By the way, the present invention is an improved seat belt device with a reach arm. The above-mentioned rocking motion can be carried out easily and smoothly in a narrow space, and when the reach arm is in the use position, it can be bent toward the seat side, making it easy for the occupant to wear the seat belt, and the impact force can cause the seat belt to tighten. The purpose of this is to reduce as much as possible the bending moment applied to the reach arm when excessive tension is applied to the reach arm.

B. Structure of the Invention (1) Means for Solving Problems In order to achieve the above object, the present invention provides a reach arm on one side of a seat arranged in a vehicle interior so as to be able to swing back and forth. In the seat belt device for a vehicle, a seat belt pulled out from a retractor is attached to the tip of the seat belt, and a through tongue inserted into the seat belt can be detachably connected to a buckle provided on the other side of the seat. a base arm pivotally supported on one side of the seat so as to be swingable back and forth; connected to the base arm so as to be bendable in a direction substantially perpendicular to the swinging direction thereof and toward the seat side; a tip arm having a connecting portion to the seat belt at its tip; an elastic member provided between the tip arm and the base arm to hold them substantially straight; Ru.

(2) Function According to the above configuration, the reach arm is swung forward from the storage position on the seat back, guiding the seat belt connected to the tip of the reach arm to the hand of the occupant on the seat, and When the seat belt is activated in a collision, the reach arm bends toward the seat due to the tension applied to the seat belt, and no excessive bending moment is applied to the reach arm.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a floor surface 3 inside a passenger compartment 2 of a vehicle body 1
Seats 4 are arranged above.

On the outside of the seat portion 4a of the seat 4, that is, on one side on the opening/closing door 5 side, a frame 6 provided on the seat 4 has a pivot 7 for swinging the base end of a reach arm R, which will be described in detail later, back and forth. be done. Reach arm R
is connected to a drive device 8 such as a motor provided on the frame 6, and drives the seat 4 as shown by arrow a in FIG.
It is designed to be driven to swing back and forth. In this case, the reach arm R may be driven to swing only forward by the drive device 8, and may be swinged backward by the biasing force of a biasing member such as a spring. The free end of the seat belt B is connected to the tip of the reach arm R. The seat belt B is pulled out from a retractor ELR provided at the lower part of the vehicle interior wall 9, and is pulled out from a guide 10 and a through ring 1 provided at the vehicle interior wall 9.
1 and extends into the passenger compartment 2.

There is a through tongue 12 in the middle of seat belt B.
is slidably inserted, and a locking hole 13 is bored at one end of the through tongue 12.

A support arm 14 is provided on the other side of the seat 4 near the center of the vehicle interior 2 and projects diagonally forward. A buckle 15 is fixed to the front end of the support arm 14, and the through tongue 12 is attached to the buckle 15. Locking hole 1
3 are detachably connected.

Next, referring to FIGS. 2 to 4, the reach arm R
Explain the structure of

The reach arm R is composed of a base arm 16, a tip arm 17, and an elastic member 18 that holds these arms 16, 17 straight.

The base arm 16 is formed of a plate material such as a metal plate, and its base end is pivoted 7 on the frame 6 so as to be able to swing back and forth, and is connected to a drive device 8 provided on the frame 6. The base arm 16 has a folded overlapping part 16a at its tip, loop-shaped left and right pin bearings 19 are formed on its upper edge, and the folded overlapping part 16a is formed in the middle part of the base arm 16.
Channel-shaped spring guide part 2 that extends outward
0 is formed, and an elastic plate 18, which will be described in detail later, is inserted into this spring guide portion 20 so as to be swingable. Further, a guide pin 21 is provided protrudingly from the intermediate portion of the base arm 16, and this guide pin 21 is slidably engaged with a guide groove 22 formed in the frame 6 as shown in FIG. Regulates the swing angle in the front-back direction. Further, at the inner end of the pin bearing 19, a locking step portion 23 is formed which engages with an engaging step portion 27 of the tip arm 17, which will be described later.

The tip arm 17 is also formed of a plate material such as a metal plate, and a clamp tongue piece 24 is fixed to the base thereof. The lower edge of the tip arm 17 and the lower edge of the clamp tongue 24 are both bent into an arc shape to form a central pin bearing 25. This central pin bearing 25 is
The pivot pin 2 cooperates with the left and right pin bearings 19.
8 bearings are formed.

Engagement step portions 27 corresponding to the locking step portions 23 are formed on both sides of the central pivot bearing 25 . The central pin bearing 25 is inserted between the left and right pin bearings 19, 19, and the pivot pin 28 is inserted between the bearings 19 and 25,
When the circlip 29 is fitted into the clip groove 28a at the end of the pin 28, the base end of the tip arm 17 will fit into the pivot pin 28 at the tip of the base arm 16.
The engaging step portion 27
When the locking steps 23 and 23 engage with each other, the base arm 16 and the tip arm 17 become straight as shown in FIG.

A stopper surface 24a is formed on the lower edge of the clamp tongue piece 24, and this stopper surface 24a abuts against the receiving surfaces 19a formed on the left and right pin bearings 19 of the base arm 16, thereby adjusting the bending angle of the tip arm 17. is regulated.

A pair of U-shaped spring locking portions 30 are formed in the middle portion of the front arm 17, and an engaging hook 18a at the upper end of an elastic plate 18, which will be described later, is locked to the spring locking portions 30. The tip of the tip arm 17 has a belt binding portion 31 made of a flexible material such as a synthetic resin material,
Belt insertion hole 3 formed in this belt binding part 31
2, the tip of the seat belt B is inserted and connected.

The elastic plate 18 is constituted by a strip-shaped plate spring, and a hook-shaped engagement hook 18a is formed at the upper end thereof. As shown in FIG. 3, the elastic plate 18 has its lower part inserted through the spring guide part 20 of the base arm 16, and then the hook-like engagement hook 18a at its upper end is inserted into the spring guide part 20 of the base arm 16.
The spring engaging portion 30 of the tip arm 17 is engaged.
As a result, the elastic plate 18 is placed along one surface of the base arm 16 and the tip arm 17,
The elastic force holds the arms 16, 17 straight as shown in FIG.

As shown in FIG. 1, when the reach arm R that can be bent around the pivot pin 28 is pivoted 7 on the frame 6 so as to be able to swing back and forth, the axis of the pivot pin 28 is along the front-rear direction of the seat 4. In a vertical plane, the tip arm 17 can be bent in the lateral direction of the seat 4 relative to the base arm 16.

Next, the operation of the embodiment of the present invention will be explained.

When the seat belt B is not in use, the reach arm R is retracted as shown by the chain line in FIG.

When the occupant currently seated on the seat 4 fastens the seat belt B, the reach arm R is swung forward when the drive device 8 is actuated. As a result, the reach arm R faces one side of the occupant, and the seat belt B connected to its tip is guided to the occupant's hand. Here, the occupant pulls the through tongue 12 inserted through the seat belt B while sliding it on the seat belt B so that its locking hole 13 is locked to the buckle 15.

As described above, the seat belt B is worn by the occupant on the seat 4, but in this case, the tip arm 17 of the reach arm R can be bent toward the seat 4 side around the pivot pin 28 against the elastic force of the elastic plate 18. .

By the way, when a vehicle encounters a collision and an excessive impact force is applied, the retractor ELR becomes locked and seat belt B protects the occupant on seat 4, but in this case, the large tension applied to seat belt B is As shown by the chain line in FIG. 3, the tip arm 17 of the reach arm R is bent toward the seat 4 around the pivot pin 28 until the stopper surface 24a at the base end touches the receiving surface 19a. Most of the tension applied to the seatbelt B is transferred to the reach arm R without excessive bending force acting on it.
can be applied as a simple tensile force.

When the occupant on the seat 4 removes the through tongue 12 from the buckle 15 in order to stop fastening the seat belt, the base arm 16 and the tip arm 17 of the reach arm R are connected to their engagement steps by the elastic force of the elastic plate 18. 27 and the locking step portion 23 are engaged with each other, so that the locking step 27 is held straight. The reach arm R is then rotated to the storage position behind the seat by the operation of the drive device 8 or by the spring force of a return spring (not shown). In its free state, the reach arm R is held straight by the elastic force of the elastic plate 18 and does not bend outward from the passenger compartment 2, so that the reach arm R can close the opening/closing door 5.
It will not interfere with the door 5 or be caught by the door 5.

C. Effects of the Invention As is clear from the above embodiments, according to the present invention, the reach arm is placed on one side of the seat.
a base arm that is pivotally supported so as to be able to swing back and forth;
At this base, in a direction substantially perpendicular to the swinging direction,
and a front arm that is bendably connected toward the seat side and has a seatbelt connection portion at its tip, and is provided between the front arm and the base arm and held so that they are substantially straight. Since the reach arm is made of an elastic member, when excessive tension is applied to the seat belt due to a collision or the like when the seat belt is worn, the reach arm will cause its tip arm to move toward the seat side with respect to the base arm. Most of the excessive tension on the belt can be applied to the reach arm as a simple tensile force without bending the reach arm and causing an excessive bending moment to act on the reach arm. There is no need to provide strength to withstand bending moments, and it is possible to form a narrow and compact structure, which not only increases the degree of freedom in layout and installation, but also reduces the possibility of getting in the way when getting on and off. , and can be provided at a low price.

[Brief explanation of the drawing]

The drawings show one embodiment of the device of the present invention; FIG. 1 is a partially cutaway perspective view of a seat equipped with the device of the present invention, FIG. 2 is an enlarged view taken along the line of FIG. Figure 2 is a sectional view taken along the line, and Figure 4 is an exploded perspective view of the reach arm. B... Seat belt, ELR... Retractor,
R...Reach arm, 2...Car interior, 4...Seat,
15...buckle, 16...base arm, 17...
... Tip arm, 18 ... Elastic plate as an elastic member.

Claims (1)

[Claims] 1 A reach arm is provided on one side of the seat arranged in the vehicle interior so as to be able to swing back and forth, a seat belt pulled out from a retractor is attached to the tip of the reach arm, and a through tongue inserted into the seat belt is attached to the seat belt as described above. In a vehicle seat belt device that can be detachably connected to a buckle provided on the other side of the seat, the reach arm has a base arm that is pivotally supported on one side of the seat so as to be able to swing back and forth. a tip arm connected to the base arm so as to be bendable in a direction substantially perpendicular to the swinging direction thereof and toward the seat side, and having a connecting portion to the seat belt at its tip; A seat belt device for a vehicle, comprising: an elastic member provided between a base arm and a base arm to hold them substantially straight;