JPH11321407A - Child seat fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict the input of a large load to a top tether. SOLUTION: An end 34B of a top tether 34 can be engaged with a top tether anchor 46 arranged in a back surface of a seat back 14 through a hook 44. One end 54A of a connecting wire 54 is connected to the top tether anchor 46, and the other end 54B is connected to a buckle supporting bracket 30. An intermediate part 54C of the connecting wire 54 is inserted through wire guides 58, 60 fixed to a seat back frame. In the case where the top tether anchor 46 is moved upward, a seat belt 22 is stretched through a tongue plate 24 engaged with the buckle supporting bracket 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a child seat mounting structure, and more particularly to a child seat mounting structure for mounting a child seat to an automobile seat.

[0002]

2. Description of the Related Art Conventionally, a passenger seat and a rear seat of an automobile may be provided with a child seat for seating a small child, and an example thereof is disclosed in Japanese Utility Model Laid-Open No. 60-166637. ing.

As shown in FIG. 8, in this child seat mounting structure, when the child seat 104 is mounted on the seat cushion 102 of the vehicle seat 100, the seat back 104 of the child seat 104 is mounted.
The other end of the top tether 106, one end of which is fixed to the upper part of A, is inserted through an opening 112 formed in the seat back 110 of the seat 100, and a locking portion of a seat back frame 114 provided inside the seat back 110. The lower portion of the child seat 104 is held on the seat cushion 102 by the seat belt 116 while being locked to the seat cushion 114A.

[0004]

However, in such a child seat mounting structure, the seat belt 116 for holding the lower portion of the child seat 104 on the seat cushion 102 is loosened due to forgetting to tighten or the like. In the event of a vehicle collision,
It is conceivable that a large load is input to the top tether 106. As a result, it is necessary to reinforce the top tether 106, which causes an increase in weight and an increase in cost.

The present invention has been made in view of the above circumstances, and has as its object to provide a child seat mounting structure capable of suppressing a large load from being input to a top tether.

[0006]

According to a first aspect of the present invention, there is provided a child seat mounting structure for mounting a child seat on a seat by using a top tether and a seat belt, wherein the top tether has one end provided above a seat back of the child seat. It is fixed, and the other end is connected to the seat belt via a connecting member.

Therefore, at the time of a vehicle collision or the like, a part of the load input from the child seat through the top tether is:
The power is transmitted to the seat belt via the connecting member. As a result, a part of the load input via the top tether can be dispersed to the seat belt, so that the input of a large load to the top tether can be suppressed.

According to a second aspect of the present invention, in the child seat mounting structure according to the first aspect, one end of the connecting member is connected to a buckle on which the seat belt is locked.

Therefore, at the time of a vehicle collision or the like, a part of the load input from the child seat via the top tether is:
It is transmitted to the buckle to which the seat belt is locked via the connecting member. As a result, a part of the load input via the top tether and the buckle can be dispersed to the seat belt, so that a large load is input to the top tether.

According to a third aspect of the present invention, in the child seat mounting structure according to the second aspect, a unidirectional load for transmitting only a tensile load from the connecting member to the seat belt to a buckle fixing member for fixing the buckle. A transmission means is provided.

Therefore, in addition to the contents described in claim 2, when a load acts on the seat belt side, this load is
It is not transmitted to the top tether by the one-way load transmission means. As a result, even when a large load acts on the seat belt side, it is possible to suppress a large load from being input to the top tether.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a child seat mounting structure according to the present invention will be described with reference to FIGS.

The arrow FR in the figure indicates the forward direction of the vehicle,
P indicates the vehicle upward direction, and IN indicates the vehicle width inside direction.

As shown in FIG. 1, a seat 10 according to the present embodiment is a passenger seat of an automobile, and a seat cushion 12 is provided.
The lower end of the seat back 14 is attached to the rear end of the vehicle via a recliner (not shown) so as to be swingable in the front-rear direction of the vehicle. Can be adjusted.

A child seat 18 can be attached to the seat 10. This child seat 18
A belt insertion hole 20 is formed in each of the left and right side surfaces 18A.
The seat belt 22 provided for restraining the occupant seated at zero is inserted therethrough. Seat belt 2
One end of 2 reaches a seat belt retractor disposed below the B pillar via a slip joint disposed above the B pillar (not shown). The other end of the seat belt 22 is fixed to the floor via a seat belt anchor.

A tongue plate 24 is movably attached to an intermediate portion of the seat belt 22, and the tongue plate 24 is detachable from a buckle 26. Buckle 26 is connected to buckle support bracket 30 by belt 28. The buckle support bracket 30 has a mounting hole 31 formed therein. The buckle support bracket 30 is fixed to the seat cushion 12 by fastening means 32 such as screws inserted into the mounting hole 31.
Is mounted near the rear end on the inner side of the vehicle width.

The seat back 18 of the child seat 18
One end 34A of the top tether 34 is connected to the central portion in the vehicle width direction of the rear portion of the vehicle at the upper end of B, and the length of the top tether 34 is adjusted near the end 34A. An adjuster 35 is attached. The seat back 18B of the child seat 18 includes:
A restraining arm 42 for restraining a child 40 sitting on the child seat 18 is attached.

As shown in FIG. 2, a hook 44 is fixed to the other end 34B of the top tether 34. The hook 44 is engaged with a top tether anchor 46 provided on the back surface of the seat back 14. It is considered possible. As shown in FIG. 3, the top tether anchor 46 is hidden in a seat back pocket 48 provided on the back surface of the seat back 14.

As shown in FIG. 4, one end 54A of a connecting wire 54 is connected to the lower end of the top tether anchor 46, and the other end 54B of the connecting wire 54 is connected to the buckle support bracket 30. It is connected to. An intermediate portion 54C of the connecting wire 54 passes through wire guides 58 and 60 fixed to the seat back frame 56,
When the top tether anchor 46 moves upward (in the direction of arrow A in FIG. 4), the buckle support bracket 30 is moved obliquely downward and rearward (see FIG. 5) via the connecting wire 54.
(In the direction of arrow B).

As shown in FIG. 5, an uneven portion 62 as a one-way load transmitting means is formed on each of opposing surfaces along the longitudinal direction of the mounting hole 31 formed in the buckle support bracket 30. The shape of these uneven portions 62 is
When a load equal to or more than a predetermined value acts on the buckle support bracket 30 in the direction indicated by the arrow B in FIG. 5, the buckle support bracket 30 moves in the direction indicated by the arrow B in FIG. When a load is applied in the direction opposite to the direction of arrow B (the direction of arrow C in FIG. 5), the buckle support bracket 30
Are set in a sawtooth shape that does not move in the direction of arrow C.

Next, the operation of the present embodiment will be described.

In this embodiment, at the time of a vehicle collision or the like, an impact force (arrow F in FIG. 1) is applied to the child seat 18 together with the child 40 restrained on the child seat 18 by the restraining arm 42. Then, the load F1 acts on the top tether anchor 46 from the child seat 18 via the top tether 34. As a result, the top tether anchor 46 moves upward (in the direction of arrow A in FIG. 4), and the buckle support bracket 30 is pulled obliquely rearward and downward (in the direction of arrow B in FIG. 5) via the connecting wire 54. When the pulling force exceeds a predetermined value, the buckle support bracket 30 moves in the direction of arrow B in FIG. 5 with respect to the fastening means 32, and the load can be dispersed to the seat belt 22. As a result, as shown in FIG.
Peak P1 of load variation S1 in top tether 34
And the peak P of the load variation S2 in the seat belt 22
2 matches.

Therefore, in the present embodiment, a part of the load input to the top tether 34 at the time of a vehicle collision or the like can be dispersed to the seat belt 22, so that a large load input to the top tether 34 can be suppressed. As a result, top tether 3
4 does not need to be reinforced. Further, in the present embodiment, when the load of the predetermined value or more acts on the buckle support bracket 30 in the direction of arrow B in FIG.
5, the buckle support bracket 30 is positioned at the arrow B in FIG.
The buckle supporting bracket 30 moves in the direction shown in FIG.
When a load is applied in the direction opposite to the arrow B direction (the direction of arrow C in FIG. 5), the buckle support bracket 30 is set to have a sawtooth shape in which the buckle support bracket 30 does not move with respect to the fastening means 32.
When a load acts on the seat belt 22 side, the fastening means 32 engages with the uneven portion 62, and the movement of the buckle support bracket 30 is prevented.
Is not transmitted to As a result, even when a large load acts on the seat belt 22 side, it is possible to suppress input of a large load to the top tether 34.

In the above description, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to such an embodiment, and various other various embodiments are within the scope of the present invention. Obviously, embodiments are possible. For example, in the above embodiment, as shown in FIG. 5, the mounting holes 31 formed in the buckle buckle support bracket 30 are provided.
On the opposing surfaces along the longitudinal direction of the, the uneven portion 62 as a one-way load transmitting means was formed, but instead of this,
As shown in FIG. 7, the configuration may be such that the uneven portion 62 is formed only on one surface (the lower surface in FIG. 7) along the longitudinal direction of the mounting hole 31. The shape of the uneven portion 62 is such that when a load equal to or more than a predetermined value acts on the support bracket 30 in the direction of arrow B in FIG. 7, the support bracket 30 moves in the direction of arrow B in FIG. When a load acts on the support bracket 30 in the direction opposite to the direction of arrow B in FIG. 7 (the direction of arrow C in FIG. 7), the support bracket 30 does not move in the direction of arrow C in FIG. It is set in a sawtooth shape.

Further, in the above embodiment, the present invention is applied to the child seat mounted on the passenger seat, but the top tether engaging structure of the present invention can be applied to a rear seat other than the passenger seat.

[0026]

According to the first aspect of the present invention, in a child seat mounting structure for mounting a child seat to a seat by a top tether and a seat belt, one end of the top tether is fixed to an upper portion of a seat back of the child seat, and the other end. Is connected to the seat belt via the connecting member, so that an excellent effect that a large load is applied to the top tether can be suppressed.

According to a second aspect of the present invention, in the child seat mounting structure according to the first aspect, since one end of the connecting member is connected to a buckle to which the seat belt is locked, a large load is applied to the top tether. There is an excellent effect that input can be suppressed.

According to a third aspect of the present invention, in the child seat mounting structure according to the second aspect, a one-way load transmitting means for transmitting only a tensile load from the connecting member to the seat belt to the buckle fixing member for fixing the buckle. Because of the provision, in addition to the effect described in claim 2, when a load acts on the seat belt side, there is an excellent effect that the load can be suppressed from being input to the top tether.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a structure for mounting a child seat according to an embodiment of the present invention, as viewed obliquely from the front inside a vehicle.

FIG. 2 is a perspective view showing a structure for attaching a child seat according to an embodiment of the present invention, as viewed obliquely from the rear inside the vehicle.

FIG. 3 is a perspective view of a seat in a child seat mounting structure according to one embodiment of the present invention, in a state where a child seat is not mounted, as viewed obliquely from the rear inside the vehicle.

FIG. 4 is a schematic view showing a main part of a child seat mounting structure according to an embodiment of the present invention, as viewed from the rear of the vehicle.

FIG. 5 is a perspective view showing a part of a child seat mounting structure according to an embodiment of the present invention, as viewed from an obliquely rear inner side of the vehicle.

FIG. 6 is a graph showing load fluctuations of the top tether and the seat belt in the child seat mounting structure according to the embodiment of the present invention.

FIG. 7 is a perspective view showing a part of a child seat mounting structure according to another embodiment of the present invention, as viewed obliquely from the rear inside the vehicle.

FIG. 8 is a schematic side view showing a child seat mounting structure according to a conventional embodiment.

[Explanation of symbols]

 10 Seat 12 Seat Cushion 14 Seat Back 18 Child Seat 22 Seat Belt 24 Tongue Plate 26 Buckle 30 Buckle Support Bracket 31 Buckle Support Bracket Mounting Hole 32 Fastening Means 34 Top Tether 44 Hook 46 Top Tether Anchor 48 Seat Back Pocket 54 Connecting Wire 56) Seat back frame 62 Uneven portion (unidirectional load transmitting means)

Claims (3)

[Claims] 1. A child seat mounting structure for mounting a child seat to a seat with a top tether and a seat belt, wherein the top tether has one end fixed to an upper part of a seat back of the child seat and the other end connected to the seat via a connecting member. An attachment structure for a child seat, wherein the attachment structure is connected to a belt. 2. The child seat mounting structure according to claim 1, wherein one end of the connecting member is connected to a buckle on which the seat belt is locked. 3. The mounting of the child seat according to claim 2, wherein the buckle fixing member for fixing the buckle is provided with a one-way load transmitting means for transmitting only a tensile load from the connecting member to the seat belt. Construction.