JP4488153B2 - Child seat locking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a device for locking a child seat in a vehicle interior to a vehicle body side.
[0002]
[Prior art]
As shown in FIGS. 9 to 12, the conventional child seat locking device for a vehicle includes a bracket 3 that is fixed to the vehicle body on the vehicle rear side of the vehicle seat 1 and protrudes onto the floor 2 in the vehicle width direction. A striker 4 having a substantially U-shape as viewed from above and fixed to each bracket 3 is fixed to each bracket 3, and the rear portion of the child seat 6 placed on the seat cushion 5 of the seat 1. Two arms 8 extending rearward of the vehicle between the upper surface of the rear end of the seat cushion 5 and the lower end of the seat back 7 in the seat 1 are respectively attached to the lower ends at appropriate intervals in the vehicle width direction. The child seat 6 is locked to the vehicle body side by engaging the latches 9 provided at the tip of the arm 8 with the strikers 4 respectively.
[0003]
However, if the impact from the vehicle side is applied at the time of a side collision of the vehicle, to the sheet 1 which is fixed to the vehicle body, the child seat 6, which is placed on the seat cushion 5 in FIG. 1 2 by the inertia of its own Since the rotational force is generated as shown by the arrow A shown in the figure, the arm 8 of the child seat 6 sinks or jumps up as shown by the arrows B and C. Since a downward or upward load is applied to the striker 4 engaged with the tip of each arm 8, the striker 4 is greatly bent as illustrated by a two-dot chain line in FIG. There is a possibility that the striker 4 and the latch 9 are disengaged.
[0004]
[Problems to be solved by the invention]
The present invention is intended to make it difficult for the child seat in the passenger compartment to be released from the vehicle body side.
[0005]
[Means for Solving the Problems]
For this reason, the child seat locking device according to the present invention has strikers that are respectively fixed to the vehicle body side at intervals in the vehicle width direction and that engage with the engaging portions that are attached to the child seat. Alternatively, the downward fixing strength is set lower on the vehicle front side of the fixing portion than on the vehicle rear side.
[0006]
That is, when an impact is applied from the side of the vehicle at the time of a side collision of the vehicle and the child seat tends to tilt in the vehicle width direction, the strikers arranged at intervals in the vehicle width direction are fixed to the vehicle body side. The upper or lower fixing strength of the portion is set lower on the vehicle front side of the fixing portion than on the vehicle rear side, so that the fixing portion is caused by the upward or downward load acting on the striker from the child seat engaging portion. The striker is easily separated from the vehicle body side on the vehicle front side.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention shown in the drawings will be described by assigning the same reference numerals to the equivalent portions of the conventional apparatus and the equivalent portions of each embodiment.
[0008]
1 to 4, the lower side of each bracket 3 that is fixed to the vehicle body and protrudes onto the floor 2 at an appropriate interval in the vehicle width direction is provided with a substantially U-shaped striker 4 as viewed from above that extends forward of the vehicle. The base end portion 10 is welded, and the base end portion 10 is welded only in the outer side in a range a1 which is the front side of the vehicle (left side in FIG. 1), and the welding strength is set to be relatively low. In the range b1, which is the rear side of the vehicle (right side in FIG. 1), welding is performed on both the inner and outer sides, and the welding strength is set to be relatively high.
[0009]
Accordingly, an impact is applied from the side of the vehicle at the time of a side collision of the vehicle, and the child seat in the vehicle interior is shocked to tilt in the vehicle width direction with the generation of the rotational force, and the arm 8 attached to one side of the child seat. Even if the leading end of the arm 8 attached to the other side of the child seat is about to jump upward, the seat built into the lower end of the seat back 7 on the other side The upward displacement is restricted by the presence of the frame 11 and the lower surface of the bracket 3.
[0010]
For this reason, the load that peels the base end portion 10 downward from the bottom surface of the bracket 3 on the front side of the vehicle acts particularly strongly on the base end portion 10 on the one side welded to the bottom surface side of the bracket 3. 1, the base end portion 10 is relatively easily peeled downward from the lower surface of the bracket 3 in the vehicle front side range a1 where the welding strength is set to be relatively low. Absorption of the impact energy associated with the peeling action can surely reduce the deformation and breakage of the striker 4. As a result, the latch at the tip of the arm 8 engaged with the striker 4 becomes difficult to come off from the striker 4. Therefore, it is possible to easily increase the safety of an infant seated on the chair.
[0011]
Further, when the base end portion 10 is peeled off from the lower surface of the bracket 3, the base end portion 10 is displaced downward and is not lifted up. Therefore, the child seat is also seated from this surface. The safety of infants can be increased reliably.
[0012]
In the embodiment shown in FIG. 5, the base end portion 10 of the striker 4 is intermittently welded in the vehicle front-rear direction in a range a2 on the vehicle front side (left side in FIG. 5) with respect to the lower surface side of each bracket 3. The welding strength is set to be relatively low, but in the range b2 on the vehicle rear side (right side in FIG. 5), the welding strength is set to be relatively high because the welding is continuously performed in the vehicle longitudinal direction. Thus, the same effects as those of the above embodiment can be achieved.
[0013]
6 and 7, the base end portion 10 of the striker 4 is press-fitted in the vehicle front-rear direction with respect to each bracket 3, but the lower surface of the bracket 3 has a vehicle front side ( Since a plurality of windows 12 that reach the base end portion 10 in the vicinity of the vehicle longitudinal direction are formed in a range a3 that is the left side in FIG. 7, the holding force of the base end portion 10 below by the bracket 3 is compared. Therefore, it is set so as to be easily detached downward, and therefore, the same operational effects as those of the above embodiments can be obtained.
[0014]
In each of the above embodiments, each striker 4 is welded to the lower surface side of the bracket 3 or is press-fitted into the bracket 3, but each striker 4 is welded to the upper surface side of the bracket 3, or the bracket 3 The vehicle front side range in which the welding strength or the upward holding force is set to be relatively small by the top end of the arm 8 attached to the child seat jumping upward at the time of a side collision of the vehicle. In this portion, the striker 4 can be easily peeled off or separated from the upper surface side of the bracket 3, and the impact energy can be absorbed along with the peeling action and the like.
[0015]
Further, as in the embodiment shown in FIG. 8, the base end portion 10 of the striker 4 is directly welded onto the floor 2, and the welding area in the range a4 on the vehicle front side (left side in FIG. 8) is set to the vehicle rear side ( Needless to say, the welding area may be set to be smaller than the welding area in the range b4 (right side of FIG. 8). Substitution is also possible.
[0016]
【The invention's effect】
In the child seat locking device according to the present invention, when the child seat is about to tilt in the vehicle width direction at the time of a side collision of the vehicle, the upward or downward load acting on the striker from the engagement portion of the child seat Therefore, when the striker is separated from the vehicle body side on the vehicle front side of the fixed portion, the striker can be reliably deformed and damaged by absorbing the impact energy associated with the separation action, so that the striker is engaged with the striker. In addition, the child seat engaging portion is unlikely to come off the striker, and the safety of an infant seated on the child seat can be easily increased.
[Brief description of the drawings]
FIG. 1 is a side view of a main part in an embodiment of the present invention.
FIG. 2 is a partial perspective view of the embodiment.
3 is a vertical sectional view taken along line III-III in FIG.
4 is a vertical sectional view taken along the line IV-IV in FIG.
FIG. 5 is a side view of an essential part in another embodiment of the present invention.
FIG. 6 is a partial side view of another embodiment of the present invention.
FIG. 7 is a perspective view of a main part in another embodiment of the present invention.
FIG. 9 is a side view of a main part of a conventional device.
FIG. 10 is an enlarged view of a main part of the conventional device.
FIG. 11 is a partial perspective view of the conventional device.
FIG. 12 is a diagram illustrating the operation of the conventional device.
[Explanation of symbols]
1 Seat 2 Floor 3 Bracket 4 Strike 5 Seat cushion 6 Child seat 7 Seat back 8 Arm 9 Latch 10 Base end 12 Window

Claims (3)

There are strikers that are respectively fixed to the vehicle body side at intervals in the vehicle width direction and that engage with the engaging portions that are attached to the child seat. A child seat locking device set lower on the front side than on the rear side of the vehicle.   The child seat locking device according to claim 1, wherein the striker is welded to a vehicle body side, and a welding area at the welded portion is set to be smaller on the vehicle front side of the welded portion than on the vehicle rear side.   The child seat locking device according to claim 2, wherein the striker is welded to an upper surface side or a lower surface side of a bracket fixed to the vehicle body side.

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