JPH032415Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a locking device for a vehicle seat such as an automobile, and more specifically, a locking device for a vehicle seat in which the angle of the seat cushion with respect to the seat frame can be adjusted. Regarding equipment. More specifically, the present invention relates to a locking device that allows one operating mechanism to operate two types of locking devices with different movements.

(Prior art) In the case of a so-called full flat seat in which the front seat back can be folded down to form one flat surface with the front seat cushion, front seat back and rear seat cushion, the middle part of the rear seat cushion Since the front edge is recessed and the front edge is high, if the passenger stands on its side, the occupant's head will drop, making it not comfortable to use. Therefore, as shown in FIG. 2, we are considering a proposal for an automobile seat in which the seat cushion is divided into sections so that each seat can be tilted forward so that it can be placed along the body or used as a pillow. In this system, at least a rear seat cushion 1 is divided into front and rear sections, and is made swingable around a pivot shaft 2, which is then fixed by a locking mechanism. Two types of locking mechanisms are required to hold the seat cushion 3, which is divided into front and rear sections, at different angles when used normally and when used while lying down.

On the other hand, most conventional locking devices operate one locking mechanism using one operating mechanism. There are also devices that use a release to transmit the movement of one operating mechanism to multiple locking mechanisms at the same time, and release the locking mechanisms at two or more locations at the same time.

(Problem to be solved by the invention) However, since the conventional lock release operation mechanism operates one lock mechanism with one operation mechanism, a corresponding operation mechanism is required for each lock mechanism, and the operation This has the advantage that the structure of the mechanism is complicated. Furthermore, when using a release to simultaneously operate two or more lock mechanisms with one operating mechanism, this is fine if the same release operation is sufficient, but this is not possible if the lock mechanisms require different movements. For this reason, when using each of the above-mentioned divided seat cushions, two operating mechanisms are required at the front edge of the seat cushion, which not only complicates the structure, but also
There is a risk of erroneous operation, and there is also the problem of increased costs due to an increase in the number of parts.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a locking device that allows a single operating mechanism to release two types of locking mechanisms that take different movements.

(Means for Solving the Problem) In order to achieve the above object, the vehicle seat locking device of the present invention includes a first locking mechanism that holds the seat cushion at an angle in normal use, and a first locking mechanism that holds the seat cushion at an angle in normal use. A second lock mechanism holds the lock at a tilted angle compared to normal use, and an operation mechanism operates the engaged state of the first and second lock mechanisms, and the operation mechanism controls the first and second locks by reciprocation. It consists of an operating shaft having a wire for disengaging one of the second lock mechanisms and a cam for disengaging the other lock mechanism by rotation of the wire, and the cam is disengaged from the other lock mechanism by axial movement of the operating shaft. The above-mentioned first or second lock mechanism, which is released by the rotation of the operating shaft, and the other lock mechanism, which is released by the rotation of the operating shaft, are arranged on one operating shaft, and are pulled or rotated with a handle provided on the one operating shaft. The first and second lock mechanisms can be released by simply performing the following two operations.

(Example) The configuration of the present invention will be described in detail below based on an example shown in the drawings.

The locking device of the present invention is installed near the pivot shaft 2 of a seat cushion (front rear seat cushion) 3 whose angle can be freely adjusted by a pivot shaft 2 on a vehicle floor 4, so that the seat cushion 3 is in a forward tilted state. The second lock mechanism 5 holds the seat cushion 3 at a tilted angle compared to when in normal use, and the first lock mechanism 6 is installed behind the pivot shaft 2 to hold the seat cushion 3 at an angle in normal use (when traveling, etc.). It is composed of an operating mechanism 7 for performing a release operation.

The second lock mechanism 5 includes a sector gear 8 fixed to the pivot shaft 2 of the seat cushion 3, a stopper plate 9 attached to the vehicle floor 4 so as to be swingable around a pin 10 parallel to the pivot shaft 2, and the plate 9. and a spring 11 that urges the sector gear 8 toward the sector gear 8. This second lock mechanism 5 normally prevents rotation of the pivot shaft 2, that is, rotation of the seat cushion 3, by meshing the sector gear 8 and the stopper plate 9 due to the elasticity of the spring 11.

The first lock mechanism 6 includes an anchor 13 fixed to the seat frame 12 of the seat cushion 3.
and the pin 1 parallel to the pivot axis 2 of the seat cushion 3.
The lock plate 14 is fixed to the vehicle floor 4 side so as to be swingable around the anchor 13, and a return spring 16 biases and rotates the plate 14 toward the anchor 13 side. This first locking mechanism 6 normally restricts the rearward movement of the seat cushion 3 by engaging the anchor 13 and the locking plate 14 due to the elasticity of the return spring 16.
It holds the seat cushion 3 in a normally used position.

The operating mechanism 7 includes an operating shaft 17 that is arranged in the longitudinal direction of the vehicle perpendicular to the pivot shaft 2 of the seat cushion 3 and moves back and forth, and is rotatably attached to the vehicle floor 4 side, and an operating shaft 17 that is rotatably attached to the vehicle floor 4 side. A wire 19 connects the lock plate 14 of the first lock mechanism 6 and the operating shaft 17.
, a cam 20 that drives the stopper plate 9 of the second lock mechanism 5, and a return spring 21 that biases the operating shaft 17 in the axial direction.

The operating shaft 17 is rotatably and slidably supported in the axial direction by a bracket 22 fixed to the vehicle floor 4 side, and when no operating force is applied by a return spring 21 interposed between the bracket and the bracket. The locking plate 14 of the first locking mechanism 6 is automatically returned to a position where the locking plate 14 of the first locking mechanism 6 is kept in an engaged state. The rear end of the operating shaft 17 and the lock plate 14 are connected by a wire 19 so that rotation of the operating shaft 17 is not transmitted to the lock plate 14.

A cam 20 installed on the circumferential surface of the operating shaft 17 is attached to the stopper plate 9 of the second lock mechanism 5.
To avoid collision during the reciprocating movement of the operating shaft 17
It is attached to the operating shaft 17 as shown in Figure 4.
The slope 23 of the stopper plate 9 is rotated by the rotation of the stopper plate 9.
The lower part of the stopper plate 9 is pushed forward and oscillated around the pin 10. Therefore, the stopper plate 9 rotates in the clockwise direction in the figure against the return spring 11 and is separated from the sector gear 8.

After pulling out the handle 18 and releasing the first lock mechanism 6, the operating shaft 17 is returned to its original position and the handle 19 is turned to move the stopper plate 9 of the second lock mechanism 5 to the top position. When the seat cushion 3 is swung clockwise and disengaged from the sector gear 8, it becomes freely rotatable around the pivot shaft 2. Therefore, after setting the seat cushion 3 to an arbitrary tilt angle, release the handle 18 and return the cam 20 to its original position, and the sector gear 8
and the stopper plate 9 engage to fix the pivot shaft 2. This allows the seat cushion 3 to maintain an arbitrary angle. During normal driving, the handle 18 is turned again to rotate the cam 20 and the stopper plate 9 is disengaged from the sector gear 8, thereby releasing the second lock mechanism 5 and freeing the angle of the seat cushion 3. , return to normal state. At this time, anchor 1 on the seat cushion side
When the seat cushion 3 is lowered, the lock plate 14 is rotated and engaged, and the seat cushion 3 is held at its angle by the first lock mechanism 6. Thus, the seat cushion 3 together with another seat cushion 3' forms one rear seat cushion.

In the illustrated example, the front seat cushion 3 is provided with a locking device consisting of the first and second locking mechanisms, but the rear seat cushion 3'
It is also optional to provide a similar locking device. It goes without saying that the locking device of the present invention can also be used for rear seat cushions that are not divided.

(Effect of the invention) As is clear from the above explanation, the locking device according to the invention includes a first mechanism that holds the seat cushion at an angle in normal use, and a second mechanism that holds the seat cushion at an angle tilted from that in normal use. The mechanism is disposed on one operating shaft, and the engagement of the first and second lock mechanisms is released by the operating mechanism consisting of a wire and the operating shaft with a cam. Therefore, each locking mechanism can be released by simply pulling and turning the handle provided on one operating mechanism, so that one operating mechanism for unlocking is sufficient. Therefore, not only is the lock release structure of each lock mechanism simple, but there is no risk of erroneous operation caused by mixing up the operating method, and the number of parts can be reduced to reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a schematic mechanical diagram showing an embodiment of the present invention;
Fig. 2 is an explanatory diagram showing an embodiment of an automobile seat implementing the locking device of the present invention, Fig. 3 is a perspective view showing the cam portion of the second locking mechanism, and Figs. 4A and B are also shown when the seat is locked. An explanatory diagram of the operating state of the cam in
FIGS. 5A and 5B are explanatory views of the operating state of the cam when the lock is released. In the figure, 5 is a second lock mechanism, 6 is a first lock mechanism, 7 is an operating mechanism, 17 is an operating shaft, 19 is a wire, and 20 is a cam.

Claims (1)

[Scope of Claim for Utility Model Registration] A vehicle seat in which the angle of the seat cushion with respect to the seat frame can be adjusted freely: (a) a first lock mechanism that holds the seat cushion at an angle in normal use; and (b) a second lock mechanism that holds the seat cushion at a tilted angle compared to normal use; (c) an operating mechanism that operates the engagement state of the first and second lock mechanisms; (d) the operating mechanism A vehicle seat comprising an operating shaft having a wire that disengages the first locking mechanism by reciprocating the wire, and a cam that disengages the second locking mechanism by rotating the wire. locking device.