JPS638514Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a passive seat belt device for a vehicle, which allows an occupant to wear a seat belt when sitting in a seat.

Various types of passive seat belt devices are known, and FIGS. 7 to 9 show the schematic structure and operation of conventional seat belt devices. An arm member 72 that can be raised and lowered freely around a lower pivot shaft 71 is arranged on the side of the seat 70, and a through ring 74 as a hook member through which a seat belt 73 is passed is provided on the upper part of the arm member 72. It will be done. seat belt 73
One end is connected to the door, and the other end is connected to the retractor 75.
connected to. At the same time as the door is closed, the retractor 75 starts retracting the seat belt 73, the arm member 72 is activated to fall down, and the through ring 74 sliding against the seat belt 73 is moved rearward and downward. sheet 70
A seat belt 73 is attached to the occupant seated in the vehicle. When the occupant exits the vehicle, the arm member 72 is operated to stand while the seat belt 73 is retracted from the retractor 75, and the seat belt 73 is released from the occupant.

In the seat belt device that operates as described above, the through ring 74 draws an upwardly convex arc locus A as shown in FIG.
That's right, and I don't like it. Also, the arm member 72 is
As shown in the figure, in a seat belt device of the type in which the occupant 76 manually raises and lowers the seat belt device, the occupant 76 is forced to take an unreasonable posture due to this operation, which is not preferable. In addition, in order to improve the ease of getting on and off the vehicle for passengers, it is desirable to position the rising point B of the through ring 74 as high as possible and as far forward as possible when the arm member 72 is raised, and this will be achieved. In this case, the length of the arm member 72 must be increased in order to increase the radius of the circular arc locus A, which increases the problem in FIG.
A problem arises in that the amount of protrusion into the vehicle interior increases.

In order to solve these problems, the upper part of the arm member provided with the through ring may be configured so that it moves up and down while tracing a straight line trajectory or a downwardly convex curved trajectory.
A specific example is one in which a linear or downwardly convex rail member is laid on the floor at the side of the seat in the longitudinal direction of the vehicle body, and the arm member is moved back and forth along the rail member; The arm member has a belt passage section at its tip and is telescopic.
Devices that move the belt passage section back and forth in a straight line are known, but in the former device, devices such as the parking brake and change lever are placed on the floor on the side of the seat, so a large device that is long in the front and rear direction is required. It is difficult to install the rail member in the vehicle interior, and in the latter device, the structure for extending and contracting the arm member becomes complicated.

The present invention has been made to effectively solve the conventional problems as described above.The purpose of the present invention is to swing the swinging member while drawing a downwardly convex curved trajectory centering on the stationary member. By doing so, the upper part of the arm member provided with the hook member through which the seat belt is passed is configured to operate to raise and lower while tracing a straight line trajectory or a downwardly convex curved trajectory. To provide a passive seat belt device for a vehicle, which can perform a raising/lowering operation using a compact and simple mechanism and can be installed in a small space inside a vehicle.

In order to achieve this object, the present invention provides a rotating member to a swinging member that swings around a stationary member, connects the stationary member and the rotating member via a rotation force transmission member, and connects the arm member to the rotating member. The lower part of the arm member is connected to a rotating member, and the arm member is activated by a combined motion of the swinging of the swinging member and the rotation of the rotating member that is rotated by the rotational force transmission member along with the swinging. It is characterized by being configured to operate inverted.

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in FIG. 1, one end 10a of the seat belt 10 is connected to a door 11 of the vehicle, and the other end 10b is connected to a retractor 13 attached to the floor on the side of the seat 12 or to the side of the seat 12.
An arm member 15 provided with a through ring 14 as a hook member through which the seat belt 10 is passed.
is arranged at the side of the seat 12, that is, between the driver's seat and the passenger seat, and the lower part of the arm member 15 is arranged at the box 16.
It is connected to a mechanism housed within the body and will be explained from FIG. 3 onwards. When the door 11 is closed, the arm member 15 is automatically activated by being driven by a motor or the like or by the winding force of the retractor 13 from the chain line state to the solid line state, and the seat belt 10 is applied to the occupant 17 seated on the seat 12. is installed. door 1
1 is opened, the seat belt 10 is retracted from the retractor 13, and the seat belt 10 is removed from the occupant 17 by automatically or manually raising the arm member 15. Although the seat belt 10 is a two-point belt in the illustrated example, it may be a three-point belt.

The above-mentioned raising/lowering operation of the arm member 15 is performed while the through ring 14 draws a straight line trajectory C or a downwardly convex curved trajectory D as shown in FIG. The operation is performed with little risk of touching the occupant 17, and when the arm member 15 is raised or lowered by manual operation, the occupant 17 can perform this operation in a natural posture, and the arm member 15 is not moved into the vehicle interior. The amount of protrusion becomes smaller.

FIG. 3 shows the basic structure of the device according to the present invention, in which a swinging member 20 is incorporated in the box 16, and a base 20a of the swinging member 20 is connected to a fixing member 21 attached to the floor or seat. The swinging member 20 is supported by an integrated shaft 22, and swings about the shaft 22 while drawing a downwardly convex curved locus in a vertical plane. A gear 23 is integrally formed on the shaft 22, and the gear 23 is a stationary gear that does not rotate. A shaft 25 of a rotating gear 24 is rotatably supported at the tip 20b of the swinging member 20, and the lower part of the arm member 15 is fixed to the shaft 25, so that the rotating gear 24 and the arm member 15 are connected to each other. The arm member 15 rotates together with the gear 24. The swinging member 20 is further provided with a shaft 27 that rotatably supports an intermediate gear 26 that meshes with both the stationary gear 23 and the rotating gear 24.

When the swinging member 20 swings around the fixed gear 23, specifically around the shaft 22, while drawing a downwardly convex curved locus in the clockwise direction in FIG. Since it rotates in the E direction while revolving above, the rotary gear 24 to which the rotational force is transmitted rotates in the F direction, and the intermediate gear 26 transmits the rotational force from the stationary gear 23 to the rotary gear 24. Functions as a member. Due to the combined motion of the clockwise swing of the swing member 20 and the rotation of the rotary gear 24 in the F direction, the arm member 15 shifts from the fallen state shown by the solid line to the upright state shown by the chain line. The transition is based on the axis 25 as the point of instantaneous rotation of the arm member 15.
This is accomplished by moving along an arcuate locus G centered on the shaft 22 and rotating the arm member 15 counterclockwise about the shaft 25.

In this way, while the swinging member 20 swings clockwise, the arm member 15 swings counterclockwise in the opposite direction, so when the arm member 15 moves from the solid line position to the chain line position, Through ring 1
The movement locus 4 is as if the arm member 15 had expanded and contracted, and becomes the above-mentioned straight line C or curved line D. The difference between these trajectories C and D is determined by appropriately setting the ratio of the rotation speed of the rotating gear 24 to the swing speed of the swing member 20 and the ratio of the length of the arm member 15 to the length of the swing member 20. By setting these ratios, the movement locus of the through ring 14 can be determined as desired.

The above is a case where the arm member 15 changes from a fallen position to a standing position, but the arm member 15
In the case of returning from the standing position to the collapsed position, only the rotating directions of the gears 24 and 26 are reversed, and the locus of movement of the through ring 14 remains unchanged.

The operation of raising and lowering the arm member 15 to allow the occupant 17 to attach and detach the seat belt 10 can be performed manually by the occupant himself or automatically. As a specific example of automation, it is possible to insert a drive shaft rotated by a motor into the shaft 22 and to swing the swinging member 20 by the drive shaft. It is also conceivable to attach an arc-shaped sector gear centered on the shaft 22 and to swing the sector gear with a pinion gear rotated by a motor.

Next, a specific device for realizing the above operation will be explained based on FIGS. 4 and 5.

In the following description, for convenience of understanding, the same reference numerals will be used for the same members as those shown in FIG. 3. A support shaft 22 is inserted laterally into the vertical bracket 21 as a fixing member in FIG. The shaft 22 is fixed to the bracket 21. A base 20a of a swing plate 20 is swingably supported at the other shaft end of the support shaft 22 via a bearing bush 31, and a gear 24 is integrally formed at the tip 20b of the swing plate 20. A moving shaft 25 is rotatably supported via a bearing bush 32. Further, a fixed shaft 27 is fixed to the swing plate 20 by screwing a nut 33 to the male threaded portion of the shaft end 27a, and a gear 26 is rotatably attached to the fixed shaft 27. 2
The gear 26 meshes with a gear 23 formed integrally with the rotating shaft 25 and a gear 24 of the rotating shaft 25.

The lower part of the arm member 15 is connected to the shaft end of the rotating shaft 25 on the opposite side to the gear 24, and this connection is made through a hole 15a in the lower part of the arm member 15 into which the rotating shaft 25 is inserted, as shown in FIG. This is accomplished by tightening and compressing the groove 15b with the bolt 34.

Mounting members 37 and 38 for stopper rubbers 35 and 36 that restrict the swinging limit of the swinging plate 20 are assembled on the side surface of the bracket 21, and a solenoid 39 and a solenoid 39 that swing around a pin 40 are attached to the bracket 21. A hook member 41 is attached thereto. The hook member 41 is formed with an engagement groove 42 in which the tip of the telescopic rod 39a of the solenoid 39 is engaged. A hook member 4 is attached to the swing plate 20.
An engaging protrusion 44 that engages with and disengages from the engaging portion 43 of 1 is provided, and constantly applies a swinging force in the counterclockwise direction about the pin 40 to the mounting member 38 and the hook member 41. A spring 45 is installed.

From the base 20a to the tip 20b of the swing plate 20
A pin 47 integrated with the base end of a spring support bar 46 is rotatably supported at the end portion 20c integrally formed to extend in the opposite direction. A spring 49 is inserted between the pin 47 and the bridge member 48 and is slidably inserted into the hole 48a of the movably assembled bridge member 48 and supported by being wound around the outer periphery of the bar 46.

An arm member integrated with a shaft 25 that is rotated by gears 23, 24, and 26 by the swing plate 20 swinging about the support shaft 22 while drawing a curved locus that is convex downward. 15
It is clear that the locus of the through ring 14 provided on the upper part of the arm member 15 is the linear locus C or the curved locus D because it rotates in the opposite direction to the swing plate 20. Swing plate 2
0 swings until it comes into contact with the stopper rubbers 35 and 36, and the swing plate 20 swings clockwise about the support shaft 22 while drawing a downwardly convex curved trajectory, and the arm member 15 stands up. In this state, the engaging protrusion 44 of the swing plate 20 comes into contact with the engaging portion 43 of the hook member 41, and the hook member 41
After the hook member 41 swings clockwise around the pin 40, the hook member 41 swings counterclockwise by the tension of the spring 45, thereby causing the engaging portion 43 to swing clockwise.
is engaged with the engagement protrusion 44, whereby the swing plate 20 is automatically held at its clockwise swing limit and the arm member 15 maintains its upright position. When the hook member 41 swings in the clockwise direction, the rod 39a of the solenoid 39 and the hook member 41 are engaged by the groove 42, so the swing of the hook member 41 is performed without any problem. It will be done.

The swing plate 20 is used to move the arm member 15 from the upright state shown by the solid line in FIG. 4 to the fallen state shown by the chain line.
When the hook member 41 swings in a counterclockwise direction while drawing a curved locus that is convex downward, the solenoid 39 is activated to retract the rod 39a, thereby causing the hook member 41 to move clockwise around the pin 40. Then, the engagement portion 43 and the engagement protrusion 44 are disengaged, and the swing plate 20 swings counterclockwise. The solenoid 39 is actuated by a limit switch for detecting door closure or the like.

When the swing plate 20 reciprocates in the clockwise and counterclockwise directions as described above, the swing plate 20 is located on the opposite side of the arm member 15 with respect to the support shaft 22, which is the center axis of swing of the swing plate 20. The bar 46 supported on the bridge member 48 rotates the bridge member 48.
8, the spring 49 repeats compression and expansion operations. Support shaft 22, bridge member 48, pin 47 at the base of bar 46
The swing plate 2 is located at the dead center position H where the
When 0 is reached, the spring 49 is most compressed,
When the position H is exceeded, the swinging plate 20 is urged in the swinging direction by the elastic force of the spring 49 that has been accumulated in the spring 49, and the quick movement of the swinging plate 20 is thereby performed. The motion allows the occupant to quickly attach and detach the seat belt.

As shown in FIG. 5, the same mechanisms I and J consisting of a swing plate 20, three gears 23, 24, 26, etc. may be provided symmetrically on the bracket 21.
That is, the mechanisms I and J are for using the device according to the present invention, which is arranged between the driver's seat and the passenger's seat, as a seat belt for the driver's seat and a seat belt for the passenger's seat.

FIG. 6 shows the basic structure of another embodiment of the present invention. In this embodiment, the base 60a of the swinging member 60
The stationary member on the side is a sprocket 63, and the rotating member on the side of the tip 60b is also a sprocket 64.
Both sprockets 63 and 64 are connected by a chain 66, and in this embodiment, the chain 66 is a member that applies and transmits rotational force to the rotating sprocket 64 as the swinging member 60 swings. When the swing member 60 swings clockwise about the shaft 62 while drawing a curved locus that is convex downward, the chain 66 moves in the K direction, and when the swing member 60 swings counterclockwise, the chain 66 swings in the K direction. 66 runs relative to the swinging member 60 in the L direction,
The arm member 55 whose lower portion is connected to the rotation sprocket 64 rotates about the shaft 65 in a direction opposite to the direction in which the swing member 60 swings, so that the through ring 54 at the upper part of the arm member 55 The movement locus can be a straight line C or a downwardly convex curve D.

The same operation as described above can be achieved by using a pulley as the stationary member and the rotating member, and using a belt as the rotating force transmitting member.

As is clear from the above explanation, according to the present invention, although an occupant seated in a seat can fasten or unfasten a seat belt by raising and lowering an arm member which has a hook member on the upper part through which the seat belt passes, the movement trajectory of the hook member does not follow an upwardly convex circular arc, but can follow a straight line or a downwardly convex curved line. As a result, the arm member does not come into contact with the occupant, and when the arm member is manually raised or lowered, the arm member can be raised or lowered without the occupant having to assume an awkward posture, and it is also possible to reduce the amount by which the arm member protrudes into the passenger compartment.

In addition, although it is possible to realize extremely effective arm member raising/lowering operations as described above, there is a fixed member and a swinging member that swings while drawing a downwardly convex curved trajectory around the fixed member. , the mechanism for raising and lowering the arm member can be configured with a small number of parts such as a rotating member that is rotatably provided on the swinging member, and the device is compact and can be installed in a limited space inside the vehicle. A useful passive seat belt device can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the inside of the vehicle cabin showing how the seat belt is attached to and taken off by the occupant, Fig. 2 is a side view showing the movement trajectory of the hook member as the arm member is raised and lowered, and Fig. 3 shows the basic structure. 4 is a side view showing a specific structure, FIG. 5 is a front partial sectional view of the same, FIG. 6 is a view similar to FIG. 3 showing another embodiment, and FIG.
8 and 9 show a conventional example, FIG. 7 is a perspective view showing a schematic structure, FIG. The figure is a side view showing a state in which the arm member is raised and lowered by manual operation. In the drawing, 10 is a seat belt, 14 is a hook member, 15 is an arm member, 20 and 60 are swing members,
23, 63 are stationary members, 24, 64 are rotating members,
26 and 66 are rotational force transmitting members.

Claims (1)

[Scope of Claim for Utility Model Registration] A passive seat for a vehicle in which a hook member through which a seat belt is passed is provided on the upper part of an arm member that can be raised and lowered, and an occupant is allowed to put on and take off the seat belt by raising and lowering the arm member. This passive seat belt device includes a fixed member fixed to a part of the vehicle body, a rotating member pivotally supported by the lower part of the arm member, and a rotating member connecting the fixed member and the rotating member. A power transmission member, a fixed member, a rotating member, and a swinging member that connects the rotating centers of the rotational force transmitting member and swings while drawing a downwardly convex curved locus about the fixed member. A passive seat for a vehicle, characterized in that, as the swinging member swings, the hooking member of the arm member moves while drawing a straight line trajectory or a downwardly convex curved trajectory. belt device.