JPH036520Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat that is installed in, for example, an automobile and whose back can be folded forward relative to the seat, and particularly relates to an improvement in a holding device for holding the back in a predetermined position.

For example, the backs of the rear seats of automobiles can be folded forward, and normally the backs are upright, but the backs can be folded forward for storage of long objects or as needed, allowing communication between the trunk and a portion of the passenger compartment. Frequently used.

By the way, in a seat with this type of structure, the back is pivotally connected to the seat, so it is necessary to maintain the normal posture by some means. Conventionally, a holding device with a simple structure is used, in which a holding part is provided on the vehicle body side, and a hooking part is provided in the back part so that the holding part can be freely attached to and removed from the holding part.

However, in this device, the engagement portion is only prevented from coming off from the holding portion by, for example, the tensile elastic force of the spring. Therefore, the vehicle body may vibrate violently when driving on rough roads,
If a strong impact load is applied, there is a risk that the engaging part will separate from the holding part and the back part will fall backwards. To prevent this, it is necessary to replace the spring with one having a stronger elasticity, or to use a hooking part that forms a strong connection that does not easily come off from the holding part. In any case, it is true that the engaging part does not come off easily from the holding part, but it is very difficult to engage and remove the engaging part when folding the back forward or returning the folded back to the normal posture. It becomes troublesome. Furthermore, since the structure becomes complicated, high costs are unavoidable.

The present invention was developed in light of the above circumstances, and its purpose is to create a seat with a relatively simple structure that doubles as a mechanism to prevent the back from falling backwards and improves operability and safety. It is intended to provide a back support device.

Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 1 shows, for example, a seat S provided in an automobile. This is composed of a seat part 1 and a back part 2, and since their ends are connected via a hinge 3, the back part 2 is freely rotatable in the front-rear direction. A back holding device A, which will be described later, is provided at both upper end portions of the back portion 2 and at a part of the vehicle body, which is an object to be attached (not shown), facing the back portion 2.

That is, this back support device A is designed as shown in FIG. 2 and subsequent figures. 2 and 3 show the back 2 in its normal posture. In the figure, 4 is a seat frame constituting a skeleton part which is a part of the back part 2, and is a highly rigid structure made of bent metal plates. A mounting seat 5 is fixed to the upper end of the seat frame 4. This is bent into a planar L-shape,
The bent piece portion 5a protrudes from the side surface of the back surface 2 and is parallel thereto. Further, one end portion of a pivot pin 6 is fixed to the seat frame 4. The other end protrudes from the side surface of the back portion 2 and is joined to the bent piece portion 5a. A screw hole (not shown) is provided in the protruding end surface of the pivot pin 6, and a screw 6a screwed into the hole rotatably supports one end of the lock lever 7. This lock lever 7 has a handle portion 8 at the other end, and is bent into an L-shaped cross section from one end to the upper surface in the figure. Furthermore, a notch 9 having a radius of curvature centered on the screw 6a is provided on the lower surface side. A tongue piece 10 that is bent inward is provided at the lower part of the mounting seat 5, and a spring 11, which is an elastic member, is stretched between the tongue piece 10 and the lock lever 7. Therefore, the lock lever 7 is always subjected to an elastic force in the clockwise direction around the screw 6a. A cushion rubber 12 is provided on a base portion 5b of the mounting seat 5 that is joined to the shift frame 4, and comes into contact with a striker 13 when the back portion 2 is held. The striker 13 is provided on, for example, a pillar of the vehicle body, and protrudes in a loop shape within the upper and lower surfaces and toward the center in the vehicle width direction. The notch 9 of the lock lever 7 can be freely hooked onto and removed from the upper part 13a of the striker 13. The spring 11 applies an elastic force to the lock lever 7 so that the notch 9 does not separate from the striker 13. A rod-shaped stopper 14 is fixed to the lower part of the outer surface of the bent piece 5a of the mounting seat 5 by, for example, welding means. This stopper 14 is arranged so that it passes through the loop of the striker 13 when the lock lever 7 is engaged with the striker 13.
It is inserted between the lower stage parts 13a and 13b. Then, when the back 2 is returned to the normal posture from the forward position, the upper part 1
3a, but if the back part 2 is tilted back beyond the normal position without the lock lever 7 engaging the striker 13, it will come into contact with the lower part 13b.

As the notch 9 of the lock lever 7 engages the upper part 13a of the striker 13,
The normal posture of the back 2 is maintained. At this time, the stopper 14 passes through the loop of the striker 13.

When folding the back 2 forward, hold the handle 8 and push up the lock lever 7 against the elastic force of the spring 11. When the cutout portion 9 comes out of the striker 13, the back portion 2 may be biased forward. When the lock lever 7 is folded forward, the spring 1 is attached as shown in Figure 4.
It comes into contact with the stopper 14 due to the elastic force of 1.

In addition, when returning the back 2 from the forward tilted posture to the normal posture, the portion of the lock lever 7 near the notch 9 comes into contact with the upper step 13a of the striker 13, and this edge slides to automatically close the notch 9. It engages with the upper part 13a.

Traveling with the back part 2 held by the holding device A,
For example, if the notch 9 comes out of the striker 13 due to vibration or strong impact caused by driving on a rough road, the fifth
The result will be as shown in the figure. That is, when the cushion rubber 12 is compressed and deformed and the back portion 2 is slightly tilted back, the stopper 14 touches the lower portion 1 of the striker 13.
Blocked by 3b. Since the stopper 14 is integrated with the back part 2 via the mounting seat 5 and the seat frame 4, the back part 2 can be held without tilting back significantly.

It should be noted that the shapes of the mounting seat, lock lever, and other components may be modified without departing from the gist of the present invention.

As explained above, according to the present invention, a lock lever having a notch is rotatably supported in the skeleton of the back part that can be folded forward, and a loop-shaped lock lever that can be engaged with the notch on the side surface of the vehicle body is provided. A striker is provided protrudingly, and an elastic body for elastically biasing the lock lever to engage with the striker is provided on the skeleton, and the lock lever
Since a stopper is provided at the lower part of the lock lever so that the notch of the lock lever comes into contact with the striker when it is separated from the striker, the lock lever and the stopper can double prevent the back from falling backwards, for example. The vehicle was rear-ended and the lock lever was turned off.
Even if the back bends backwards while remaining engaged with the striker, the notch of the lock lever will shift laterally toward the protruding end of the striker, and eventually this protruding end will come into contact with the stopper, causing the back to fall backwards. It is possible to prevent movement and deformation and damage of the lever, thereby improving safety, improving the operability of holding and releasing the holding, and providing an inexpensive back holding device.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, FIG. 1 is a perspective view of a seat equipped with a back support device, FIG. 2 is a plan view of the back support device, FIG. 3 is a side view thereof, FIG. 4 and FIG. FIG. 5 is a side view of the back support device in different states. 1... Seat, 2... Back, S... Seat, 5...
Mounting seat, 7... Lock lever, 9... Notch, 1
3... Striker, 14... Stoppa.

Claims (1)

[Scope of utility model registration request] In a vehicle seat that has a seat part and a back part that is pivotally attached to the seat part so as to be foldable back and forth, and the back part can be held in a seating position, the seat part is pivoted to the skeleton part of the back part and extends in the longitudinal direction of the vehicle. A lock lever is provided with a notch, and a lock lever is provided in a loop shape from the side of the vehicle body in the upper and lower surfaces and toward the center in the width direction of the vehicle, and the notch of the lock lever is engaged with the upper part of the loop. a striker that can be combined with the striker; an elastic member that is provided on the skeleton portion and elastically urges the lock lever to come into contact with the striker when the cutout of the lock lever is engaged with the striker; and a metal stopper located near the lower part of the frame and provided in the frame and passing through the loop of the striker when the notch is engaged with the striker. holding device.