JPH0366179B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a belt reacher device that facilitates belt attachment by tilting forward a rotary arm with one end of a belt attached to its free end, and particularly relates to a belt reacher device that facilitates attachment of a belt. The present invention relates to a belt reaching device of the above type which is highly reliable.

<Prior art> One end of a belt is attached to the free end of a rotary arm, and the rotary arm is tilted forward as the door is closed, thereby moving the tongue attached to the belt from the back of the backrest to the front. Although it is conceivable to make it easier to attach the belt, it has not been fully put into practical use due to various technical difficulties in ensuring the reliability of its operation. It is conceivable to realize such a belt reach device using a pneumatic cylinder or an electric motor, but if the drive device and the rotary arm are directly connected, when a large load is applied to the rotary arm side, the drive device I'm worried about hurting my body. Therefore, it is necessary to provide some kind of shock absorbing device between the drive device and the rotary arm. As such a shock absorber, it is conceivable to combine a spring means and a clutch means, but this would not only complicate the structure and increase costs, but also make it difficult to ensure its reliability.

<Problems to be Solved by the Invention> In view of these drawbacks of the prior art, the main object of the present invention is to provide a simple yet reliable method of providing a damping device between the drive device and the rotary arm. Our goal is to provide a high-performance belt reacher device.

<Means for Solving the Problems> According to the present invention, one end of the seat belt is connected to its free end, and the seat belt is connected between the forward leaning use position and the backward leaning standby position. A belt reaching device comprising a rotary arm capable of turning movement, a power transmission means for applying rotational force to the rotary arm, and a buffer means provided between the power transmission means and the rotary arm, the buffer means is a first transmission member to which the motive force is directly applied;
A second transmission member is combined coaxially with the first transmission member and rotatable relative to each other at a predetermined angle, and a second transmission member is combined coaxially with the second transmission member and rotatable relative to each other at a predetermined angle. a third transmission member to which the rotary arm is connected; a first spring means for rotationally biasing the second transmission member in one direction with respect to the first transmission member; This is achieved by providing a belt reacher device characterized in that it has a second spring means that biases the transmission member to rotate in the other direction.

<Function> In this way, the three transmission members are coaxially combined so that they can rotate relative to each other, and power is transmitted between the three members through two spring means that exert biasing forces in mutually opposite directions. By doing so, the shock absorber for floatingly connecting the rotary arm to the drive source can be configured compactly. As a result, even if the movement of the rotary arm is restricted by a person, object, etc., the operation of the belt reacher device will not be hindered, and no unreasonable force will be applied to the belt reacher device.

<Examples> Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing the entire belt reacher device according to the present invention, in which a belt 1 is let out from a retractor 2, passes through a through ring 3, and is then attached to the free end of a rotary arm 4. When the door is open, the rotary arm 4 is in a backward tilted position as shown by arrow B as shown by the imaginary line, and as the door is closed, it is tilted forward as shown by arrow A. It is designed to rotate towards the position. A tongue plate 5 is secured near the tip of the belt 1, and after the rotary arm 4 is tilted forward, the tongue plate 5 can be easily secured to the buckle 7 by the occupant sitting on the seat 6. become. In this type of belt reacher device, the belt appears in an easy-to-attach area when the door is closed, so it is possible to effectively encourage the use of the belt without giving the occupant a feeling of restraint. I can do it. Further, when the door is opened, the rotary arm 4 tilts backward so that the belt 1 follows the center pillar, so that the belt 1 does not get in the way when getting into or out of the rear seat.

Various drive sources can be used to drive such a belt reacher device, especially the rotary arm 4, but in the case of this embodiment,
The door closing force is transmitted by the control cable 9 attached to one end of the door checker in the door panel to the rotary unit 8 provided on the tilting axis of the rotary arm 4 as a traction force of the control cable 9, and is used as the door closing force driving source. The rotary arm 4 is driven as follows.

2 and 3 show the rotary unit of FIG. 1 in detail. One end of the outer cable 19 of the control cable 9 is attached to the fixing bracket 11a of the seat assembly, and the inner cable 18 is inserted into the fixed bracket 11a, and the free end of the inner cable 18 is connected to the pulley 13 that serves as the first transmission member. is wrapped around. The pulley 13 is rotatably supported on a pivot shaft 12 fixed to a fixed bracket 11a of the seat assembly. The pivot 12 further supports a pulley 14, which is a second transmission member, at a position adjacent to the pulley 13.
The cable 22 wound around the cable 22 is connected to one end of a tension coil spring 23 constituting the first spring means via a guide 21 fixed to the fixed bracket 11a. The other end of the tension coil spring 23 is engaged with a fixed bracket 11b integrally provided with the seat assembly, and the pulley 14 is biased to rotate in one direction via a cable 22.

The pivot 12 further rotatably supports a disk member 15, which constitutes a third transmission member, at a position adjacent to the second pulley 14. This disk member 15 has a mounting hole 17 and a pin 1 at the base end of the rotary arm 4.
It is fixed via 6. The pin 16 is provided with a damper 1 for controlling the movement of the rotary arm 4.
One end of 0 is connected. Further, a stopper protrusion 24 is integrally provided at a suitable position on this disc member 15, and works in conjunction with a stopper member 25 made of rubber attached to a bracket 11a that is integrally fixed to the seat assembly. The maximum forward tilt position of the rotary arm 4 is determined.

4 and 5 are exploded perspective views showing the relationship between the pulleys 13, 14 and the disc member 15 in detail. As shown well in Figure 4,
An annular recess 14b is formed in the surface of the pulley 14 facing the side of the disc member 15, and a torsion coil spring 26 constituting a second spring means is received in the recess 14b. One end 26a of the torsion coil spring 26 is engaged with a hole 14a provided on the side of the pulley 14,
The other end 26b is similarly engaged in a hole (not shown) provided on the side of the disc member 15. In addition, on the opposing surfaces of the disc member 15 and the pulley 14, there is provided an angle of approximately 45° on the same circumference concentric with the rotation axis, respectively.
It has protrusions 27 and 28, respectively, provided over an angle of It is designed to be limited.

As shown in FIG. 5, the disc member 15 and the pulley 14 are
When transmitting driving power in a direction that tilts the rotary arm 4 forward toward the
When the driving force is transmitted in a direction to tilt the rotary arm backward, both protrusions 27 and 28 come into contact with each other so that the power is directly transmitted.

As clearly shown in FIG. 5, the second pulley 14 and the first pulley 13 each have an annular groove 2 along the same circumference concentric with the central axis.
9 and protrusions 30 are provided on opposing surfaces of both pulleys. The annular groove 29 is provided over an angle of approximately 315°, and the protrusion 30 is provided over an angle of approximately 45°. Both pulleys 13 and 14 are combined so that the protrusion 30 projects into the annular groove 29.

As described above, the second pulley 14 is always biased by the tension coil spring 23 in a direction to tilt the rotary arm 4 backward, and as the door closes, the inner cable 18 is pulled and the first pulley 13 rotates. When doing so, the protrusion 30 comes into contact with one edge of the annular groove 29, and rotational driving force is transmitted from the first pulley 13 to the second pulley 14. However, if the door is opened while the rotary arm 4 is forcibly held in a forward-inclined state for some reason, the protrusion 30 moves backward in the groove 29, causing the pulley 13 to move toward the pulley 14 and the door. Disc member 1
5, the door can be restored to the open position.

The operation of the embodiment of the present invention will be explained below with particular reference to FIGS. 4 and 5.

First, when the door is open, no tractive force is generated on the inner cable 18, and the rotary arm 4 is in a rearward tilted position as shown by the imaginary line in FIGS. 2 and 3. When the occupant takes a seat and closes the door, the inner cable 18 is towed and the fourth
The first pulley 1 is moved in the direction shown by the arrow a in FIG.
3 is rotationally driven. Then, the protrusion 30 of the first pulley 13 comes into contact with the edge of the annular groove 29 of the second pulley 14 and drives the second pulley 14, and the second pulley moves against the spring force of the tension coil spring 23. 14 in the direction of arrow a. At the same time, the second pulley 14 connects the disc member 1 via the torsion coil spring 26.
5 in the direction of arrow a to tilt the rotary arm 4 forward. In this way, the occupant can reach the tongue plate 5 located near the free end of the rotary arm in a natural posture, and can easily engage the tongue plate 5 with the buckle 7 and fasten the seat belt.

Since the driving force is transmitted between the second pulley 14 and the disc member 15 via the torsion coil spring 26, the forward tilting speed of the rotary arm 4 is controlled appropriately by the damper 10 connected to the pin of the disc member 15. can be controlled. Furthermore, even if the rotary arm 4 comes into contact with some kind of obstacle while tilting forward, the driving force that tries to tilt the rotary arm 4 forward is absorbed by the torsion coil spring 26, so there is no unreasonable force on the rotary arm. is never added.

When the door is closed and the tongue plate is released from the buckle 7, the rotary arm 4 is still in the forward tilted position. If the door is opened at this time, the pulling force of the inner cable 18 is lost, and the restoring force of the tension coil spring 23 causes the second pulley 14 to rotate in a direction that tilts the rotary arm 4 backward. Then, the protrusion 28 provided on the second pulley 14 connects with the protrusion 2 provided on the disc member 15.
7 and directly tilts the arm 4 backward. If some obstacle comes into contact with arm 4,
If the arm 4 cannot tilt backward even though the door is opened, the protrusion 30 of the first pulley 13 is in the groove 2.
9, the first pulley 13 freely rotates relative to the second pulley 14, and the inner cable 18
No excessive force is applied to the When the obstacle abutting the rotary arm 4 is removed, the rotary arm 4 returns to the rearward tilted position by the restoring force of the tension coil spring 23.

In the above embodiment, the protrusion 30 and the annular groove 29 provided on the first pulley 13 and the second pulley 14 function as a one-way clutch, but other known mechanisms may be used. You can also do that.
Furthermore, the cable 22 and the tension coil spring 23 are used as means for restoring the second pulley 14;
Other restoration means can also be used.

<Effects> As described above, according to the present invention, since a relatively simple configuration is used, the manufacturing cost is low and the reliability is high. Additionally, even if the door is opened or closed while the rotary arm is restrained, the driving force is properly absorbed by the spring means, so no excessive force is applied to any part, resulting in excellent durability. . Therefore, the belt reaching device based on the present invention has extremely high practicality and can effectively encourage the wearing of the belt, so that its effects are extremely large.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the overall configuration of a belt reacher device based on the present invention. FIG. 2 is a partially cut-away plan view of the belt reacher device shown in FIG. 1; FIG. 3 is a side view of the same essential parts of the above embodiment. FIGS. 4 and 5 are exploded perspective views showing in detail the mutual relationship of the three transmission members used in the above embodiment. 1... Belt, 2... Retractor, 3... Through ring, 4... Rotary arm, 5... Tongue plate, 6... Seat, 7... Buckle, 8...
... Rotary unit, 9 ... Control cable, 10 ... Damper, 11a, 11b ... Fixed bracket, 12 ... Pivot, 13 ... First pulley, 14 ... Second pulley, 14a ... Hole, 14
b... depression, 15... disc member, 16... pin,
17...Mounting hole, 18...Inner cable, 19
... Outer cable, 21 ... Cable guide,
22...cable, 23...tension coil spring,
24... Stopper projection, 25... Stopper member,
26...Torsion coil spring, 26a, 26b...End portion, 27, 28...Protrusion, 29...Annular groove, 30
...Protrusion.

Claims (1)

[Claims] 1. One end of the seat belt is connected to its free end,
A rotary arm capable of pivoting between a forward-tilted use position and a rearward-tilted standby position, a power transmission means for applying rotational force to the rotary arm, and a power transmission means provided between the power transmission means and the rotary arm. In the belt reacher device having a buffer means, the buffer means is assembled with a first transmission member to which motive force is directly applied, and coaxially with the first transmission member and rotatable relative to each other by a predetermined angle. a second transmission member that is combined with the second transmission member; a third transmission member that is combined coaxially with the second transmission member and rotatable relative to each other at a predetermined angle, and to which the rotary arm is connected; a first spring means for rotationally biasing the second transmission member in one direction relative to the transmission member; and a first spring means for rotationally biasing the third transmission member in the other direction relative to the second transmission member. A belt reaching device characterized by having two spring means.