JPS6335855Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that prevents a rear seat of an automobile having a seat back that can be folded forward from tipping forward even if a front-back impact is applied during driving.

In order to secure more space in the luggage compartment, some recent automobiles are equipped with a seat back 1 on the rear seat 2 that can be folded forward, so that the passenger compartment and the luggage compartment communicate with each other. As shown in FIG. 1, which shows the planar structure of the conventional seat back 1, the lower part of the seat back 1 is rotatably supported toward the vehicle body by pivot shafts 3, 3' in order to be folded forward, and the seat back 1 can be folded forward when the seat is folded forward. A locking mechanism 4 is provided for holding. Further, on both sides of this seat bag 1, there are levers 5, 5' for releasing the lock of the locking mechanism 4 so that the seat bag 1 can be folded down from either side.
is provided. In the illustrated embodiment, the lever 5 on the side of the locking mechanism 4 is directly connected to the locking mechanism 4, and the other lever 5' is connected to one end of a rod 6 extending in the width direction of the seat bag 1. The other end of the rod 6 is connected to the lock mechanism 4.

The locking mechanism 4 includes a pawl 8, a link 9, and a latch 12 in a case 7 fixed to the side of the seat bag 1, as shown in FIG. 7 showing its broken structure. The pawl 8 is fixed to one end of the rod 6, and its upper portion is connected via a shaft 10 to the end of a link 9 to which the lever 5 is connected. The lever 5 rotates around the rod 6 as the lever 5 moves. Also, Paul 8
has a notch 11 in its lower part, and a latch 12 that engages with this notch 11 is rotatably provided via a shaft 13 supported by the case 7.
Further, the latch 12 is provided with a recessed notch 14, and both ends of the notch 14 can be engaged with a striker 15 fixed to the vehicle body. When the seat bag 1 is raised, the latch 12 is engaged with the striker 15 and the seat bag 1 is raised.
However, when one of the levers 5, 5' is rotated forward, the rod 6 moves into the notch 11.
By rotating together with the pawl 8 about the fulcrum, the locking state with the latch 12 is released, and the locking state between the latch 12 and the striker 15 is also released, allowing the seat bag 1 to be tilted forward.

However, even in the locked state, when the seat bag 1 is subjected to an impact force A in the longitudinal direction, the seat bag 1 is bent and deformed in the direction of the load, and the load in the longitudinal direction is transmitted to the rod 6. Therefore, the rod 6 is bent in the front-rear direction, and both ends of the rod 6 are pulled toward the center. As a result, the pole 8 fixed to one end of the rod 6 was pulled toward the center in the width direction and came off the latch 12, creating a risk that the rod would be released. In this case, the seat bag 1 would easily fall forward, which could lead to a dangerous situation if a child or the like was placed on the rear seat 2.

Therefore, in order to eliminate the above-mentioned conventional drawbacks, the present invention has developed a lock mechanism that absorbs the deformation force by changing the length of the rod itself even if the seat back is deformed by impact force in the front and rear direction. An object of the present invention is to provide a seat back device that maintains a locked state.

The structure of the present invention to achieve this purpose is as follows:
A rear seat bag whose distal end is attached to the vehicle body via a pivot so that it can be folded forward, a lock mechanism that is attached to the rear seat bag and can be locked to the vehicle body side, and a lock mechanism that rotates on both sides of the rear seat bag in the width direction. A lever is movably attached to operate the lock mechanism, and a rod extends in the width direction of the rear seat bag and has both ends connected to the lever, and the rod extends in the longitudinal direction. It is characterized in that it is divided into a plurality of pieces along the length, and the divided parts are interconnected via buffer means that can be expanded and contracted in the longitudinal direction.

An embodiment of the present invention will be described in detail below based on the drawings. Note that the same numbers are given to the same parts as in the prior art, and explanations are omitted.

The seat back device according to the present invention includes a locking mechanism 4 and levers 5 and 5' for releasing the locked state on both sides, and a rod divided into two parts and connected between the one lever 5 and the locking mechanism 4. It is a structure with 20.

As shown in FIG. 2, the rod 20 includes a rod 21,
Two rods 22 are used and their ends are connected to form one rod 20, and the end of one rod 22 is attached to the lever 5'.
The other end of the rod 21 is connected to the pawl 8 in the locking mechanism 4. Further, as shown in FIGS. 3 and 4, the connecting portion of the rod 20 has connecting ends 21a, 22a of each of the rods 21, 22 formed in a flat plate shape, and the connecting ends 21a, 22a have an axial direction. Opposite elongated holes 21b and 22b are provided, respectively.
The connecting portion of the rod 20 is formed by overlapping the connecting ends 21a, 22a of the rods 21, 22 with each other and connecting these elongated holes 21.
Rivets 23 are inserted into b and 22b, and the overlapping connecting ends 21a and 22a are connected by riveting from both sides to form a buffer means.

Furthermore, when connecting the rods 21 and 22, the connection positions of the overlapping connecting ends 21a and 22a are such that the inner ends of the respective elongated holes 21b and 22b abut against the rivet 23, as shown in FIG. established in In other words, when a longitudinal impact A is applied to the rod 20 attached to the rear seat bag, the rods 21 and 2 are bent as shown in FIG.
The elongated holes 21b and 22b are offset from each other and riveted together so that the elongated holes 21b and 22b are slid and extended by the length of the elongated holes 21b and 22b. It is preferable to tighten the rivets to such a strength that the rods 21 and 22 can slide relative to each other upon receiving an impact. Further, the connecting portion is oriented so that the central axis of the rivet 23 is perpendicular to the floor surface of the vehicle body so that the rods 21 and 22 can easily slide during an impact.

When the rear seat bag equipped with the rod 20 having the above structure receives a longitudinal impact A while being locked by the locking mechanism 4, the rod 20 bends in the direction of the load due to this impact force. As shown in FIG. 5, the pole 8 remains connected to the rivet 23 and extends by the length of the elongated holes 21b and 22b, so that the pole 8 connected to one end of the rod 20 is not pulled inward. Therefore, the pawl 8 does not come off the latch 12, and the rear seat bag is held locked to the vehicle body by the locking device 4.

In the above embodiment, two rods 21 and 22 are used, and long holes 21 are formed at their connecting ends 21a and 22a.
b, 22b and these elongated holes 21b, 2
2b are overlapped and a rivet 23 is passed through the two rods 21 and 22 to connect them to constitute a buffering means.
As shown in FIG. 6, the connecting end 21a of one rod is provided with a long hole 21b similar to that in the above embodiment, and the connecting end 22a of the other rod is provided with a projection 24.
4 may be press-fitted into the elongated hole 21b and connected, so that the respective rods do not slide under normal conditions.

Further, in the above embodiment, a rod that is divided into two pieces and connected together is used, but the rod may be divided into a plurality of pieces and connected as appropriate depending on the bending of the rod.

Furthermore, although we have explained the case where the length of the rod itself can be varied by providing a long hole, a protrusion fitted into the hole, or a rivet in the connecting part of the rod, the rod itself is not limited to this. It is sufficient that the length of the rod itself can be changed when the rod receives an impact in the front-rear direction.

As described above in detail with reference to the embodiments, according to the seat back device of the present invention, the rod for transmitting the rotation of the lever to the locking mechanism is divided into a plurality of parts, and the overall length of this rod is variable. By connecting the divided parts to each other via a buffer means, even if the rear seat back receives a front-back impact, the pole of the locking device remains fixed at the end of the rod by extending its entire length. Since there is no need to pull the latch, the locked state of the pole and latch is ensured, and the locked state of the rear seat back can be maintained. As a result, the rear seat bag does not fall forward even in the event of an impact, thereby protecting the occupants.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a conventional rear seat back that can be tilted forward, Figs. 3 is a plan view of the connecting portion of the rod, FIG. 4 is a side view thereof, FIG. 5 is a side view showing the extended state of the rod when an impact is applied, and FIG. 6 is a view of the rod according to another embodiment. A side view of the connecting portion, and FIG. 7 is a cutaway perspective view showing the schematic structure of a conventional locking mechanism. In the drawing, 4 is a lock mechanism, 5 and 5' are levers,
8 is a pole, 12 is a latch, 15 is a striker,
20 is a rod, 21, 22 are bars, 21a, 22a
21b and 22b are long holes, 23 is a rivet, 24 is a protrusion, and A is the direction of impact force.

Claims (1)

[Scope of utility model registration request] A rear seat bag whose lower end is attached to the vehicle body via a pivot so that it can be folded forward; a lock mechanism that is attached to the rear seat bag and can be locked to the vehicle body side; and a lock mechanism that can be rotated to both sides in the width direction of the rear seat bag. The lever includes a lever that is freely attached to operate the lock mechanism, and a rod that extends in the width direction of the rear seat bag and has both ends connected to the lever, and the rod extends along the longitudinal direction of the rear seat bag. 1. A seat bag device, characterized in that the seat bag is divided into a plurality of parts, and the divided parts are interconnected via a buffer means that can be expanded and contracted in the longitudinal direction.