JPS6040340Y2 - Locking device for folding seats - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a locking device for a foldable seat mainly used in the passenger compartment of a light van type vehicle.

In the general body structure of a light van, as shown in Fig. 1, the interior of the vehicle includes, in order from the front, front seats 1,
A rear seat 2 and a luggage compartment seat 3 are installed, and the luggage compartment seat 3, which is installed between the rear wheel houses 4, is foldable.
Except in special cases where a large number of people are to be carried, the seat 3 is folded forward to make it easier to load luggage.

However, as shown in Fig. 2, the forward folding method involves first folding the seat back 5 forward and stacking it on the seat cushion 6 ((Fig. a) - (Fig. 1))). If you do this, the seat cushion can be tilted forward about the pivot point 9 of the floor 8, which is the first pivot point (Fig. c).
is stored behind the rear seat 2, allowing effective use of space in the luggage compartment.

By the way, according to the structure of the conventional luggage compartment seat, the back 5 was simply hinged to the seat 6, so it was inevitable that the hinge would wobble, and the rear part of the seat 3 would Since the cushion 6 only rests on a rubber damper 10 attached to the floor 8, the rear part of the cushion 6 tends to float due to vibrations of the vehicle body, and as a result, the seat 3 shakes and rattles. This not only worsens the comfort of sitting, but is also undesirable from the standpoint of stability for the seated person while driving, and this drawback is especially noticeable when various parts become worn or loose due to long-term use. It is.

The present invention has been made to eliminate the above-mentioned drawbacks, and the purpose of the present invention is to reliably maintain the upright position of the seat, and to prevent the seat from becoming worn even when the structural members are worn or bent. It is an object of the present invention to provide a locking device for a foldable seat that does not reduce its retention properties.

Hereinafter, the present invention will be explained based on an illustrated embodiment.

In the locking device of the embodiment, as shown in FIG. 3, a cushion plate 10 and a back plate 11 made of approximately triangular plate materials are provided on the respective sides of the cushion 6 and the back 5.
are fixed, and both plates 10.11 are connected to a second
They are pivotally connected to each other by a hinge bottle 12, which is a pivot part, with the back plate 5 facing inside.

The manner in which each part is formed will be described below, with reference mainly to FIG. 4b, where the notation is easy to see, that is, a view of the state during forward-folding operation.

A catch 13 is provided at the bottom corner of the cushion plate 10.
In addition to having a bottom-shaped notch 10a that engages (details will be described later), a countersink hole 10b is bored near the center on the right side, and a countersink hole 10b is bored inwardly to the left of the countersink hole 10b. A lock lever 15 is pivotally supported on the implanted support shaft 14.

A lock pin 16 is implanted at the end of the lock lever 15 through the lever plate, and the outward projecting portion of the pin 16 is guided into the countersunk hole 10b. 15 is biased by the extension spring 22, and is given a counterclockwise behavior in the drawing, so that the pin 16 is rotated in the countersunk hole 10.
It is stopped at the upper edge of b.

Next, around the back plate 11, there are formed a striker lla that faces the catch 13, and a hook R11b that is an engaging member with the lock pin 16 into which the inward protrusion of the lock pin 16 enters. , A long countersunk hole 11c is bored near the left side of the drawing.

Furthermore, the support shaft 1 is installed inwardly on the back plate 11.
7, an L-shaped operating lever 18 is pivotally supported, and the long arm of the lever 18 bends outward in the middle and passes through the countersunk hole 11c, and a handle 18a is formed at the tip. Ori,
Further, the short arm 18b functions to press the lock pin 16 downward, as will be described later.

The operating lever 18 is biased by a torque spring 19 (see FIG. 3) to rotate clockwise in the drawing, and the penetrating portion of the countersunk hole 11c is abutted against the edge of the countersunk hole 11C.

In addition, a bracket 20 to which a catch 13 is attached is fixed to the floor 8 at the rear of the seat, and a damper 21 made of a rubber block is extended around the entire front of the bracket 20.

Incidentally, the seat cushion 6 is pivotally connected to the floor 8 at the lower ends of the front legs (not shown), as in the case of the folding seat of the conventional structure described above, and in the upright position in which the occupant can sit, the seat cushion 6 is As shown in FIGS. 3 and 4a, the rear part of the cushion 6 rests on the floor 8 via a damper 21.

Next, the operation of the locking device according to the embodiment configured as described above will be explained.

First, in the normal state where the seat is in the upright position, the striker 11a is engaged with the catch 13 as shown in FIG. Even if the rear part of the seat does not rise above the floor 8, and even if the vehicle body experiences backward acceleration or a forward external force is applied to the seat back 5, the lock pin 16 will not hook up. Since the seat back 5 is engaged with the seat back 5, the seat back 5 is not tilted forward, and the seat is securely and firmly fixed to the floor 8 in this way.

Next, when trying to move the seat back 5 to the front row,
As shown in FIG. 4a, the operating handle 18a can be tilted forward against the biasing force of the torque spring 19. In this way, the short arm 18b of the operating lever 18 can resist the biasing force of the extension spring 22. As the lock pin 16 is pushed down to the lower end of the countersunk hole 10b, the pin 16 comes off from the hook groove 11b and the bag 5
can be easily pushed down.

Therefore, while the back seat 5 is folded forward, the striker lla comes off from the catch 13, and the seat cushion 6 can be easily folded forward by lifting the rear part of the cushion 6, as shown in FIG. be able to.

Next, to return the seat to the upright position, first tilt the cushion 6 backwards, the cushion 6 and the back 5 remain as one body, and the rear part of the seat rests on the damper 21, and at the same time, the notch 10a of the cushion 10 Also caught 13.

After that, if the seat back 5 is also pushed back, the lock pin 16 will be moved to the tapered edge 11d (the fourth
Figure b) and enters into the hook groove 11b by habit.
At the same time, the striker 11a engages the catch 13, thereby returning to the upright position (FIG. 3).

In the process of returning to the standing position, as shown in FIG. Hinge bolt 1 according to rotation
Catch 1 because it is formed to approach 2.
3, a wedge action occurs between the striker lla and the catch 13, the rear part of the cushion 6 is pushed down and strongly pressed against the damper 21, and the front edge 11f of the hook groove 11b
However, as the lock pin 16 swings at an angle with respect to the direction line toward the hinge bolt 12, the pressure contact force with the front 1tllf increases, so the front edge 11f of the back plate acts as a wedge. This brings the bag 5 into pressure contact with the pin 16, thereby shifting the back and forth wobbling of the bag 5 with respect to the cushion 6, thereby suppressing the wobbling of the bag 5.

Therefore, when the seat is upright, there is no wobbling in the seat, and even if each member is worn out or flattened, the wobble is absorbed by the wedge action described above, reducing the holding power of the seat. I have nothing to do.

As described above, according to the locking device for a foldable seat according to the present invention, the engagement operation between the striker on the back plate and the catch on the floor, and the engagement between the hook groove on the back plate and the lock pin on the cushion plate are achieved. The seat in the upright position is reliably and firmly held on the floor by both the engaging actions between the seats, and the engaging actions have a wedge action, so that the holding action does not deteriorate over time. This has the effect of improving the usability, safety and durability of the folding seat, as well as the operability when folding the seat forward and returning to the standing position.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the seat of a light van, Figures 2a to 2C are operational diagrams of the foldable seat in Figure 1, and Figure 3 is a schematic diagram of the seat of a light van.
The figures are a side view of a locking device for a foldable seat showing an embodiment of the present invention; 5 is a partially enlarged view of the seat back plate in FIG. 4. FIG. 5...Seat back, 6...Seat cushion, 8...Floor, 10...Cushion plate, 10b...Plate as stroke Hole, 11... Back plate, 11a.
...Striker, 11b...Hook groove,
12------Hinge bolt, 13...Catch, 16...Tatsuku pin, 22...Extension spring.

Claims (1)

[Claims for Utility Model Registration] The seat cushion is arranged such that the front part thereof is pivotably supported on the floor surface so that it can be folded forward, and the lower end of the seat back is pivotably supported by the rear end of the seat cushion. In a foldable automobile seat that is arranged on a cushion so as to be foldable forward, the seat is swingably provided on one of the seat cushion or the seat back, and is held at one end in the swinging direction by a spring bias. a lock pin provided on the other side of the seat cushion or the seat back; and a catch provided on the other side of the seat cushion or the seat back. an engaging member having a peripheral edge configured such that a pressure contact force with the lock pin increases as the seat back swings in a direction, and the engaging member maintains a position that blocks forward tilting of the seat back; a lock release means for disengaging the mating member from the lock pin; and a lock release means provided on the seat back, the lock release means disengaging the lock pin from the lock pin, and the lock release means disengages the lock pin from the lock pin. A striker having an inner peripheral edge configured to approach the branch and capable of engaging with the catch, which presses the catch toward the inner peripheral edge when the seat back is raised, and separates from the catch when a penalty is imposed. A locking device for a foldable seat, characterized by comprising: