JPH0412821Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a vehicle seat, and more particularly to an improvement of a vehicle seat comprising a seat longitudinal slide mechanism and a lifter mechanism.

[Conventional technology]

In general, a vehicle seat is equipped with a seat cushion and a seat back that stands upright behind the seat cushion and can be rotated freely, and the entire seat is supported on the floor surface of the vehicle body by a front-back sliding mechanism, etc. The seat is configured to be able to be adjusted by sliding in the front and rear directions, so that a seated state can be obtained according to the body shape and preferences of the seated person.

Furthermore, in recent vehicle seats of this type, in addition to the above-mentioned slide mechanism, the seat cushion portion is supported by a parallel link or the like so as to be movable up and down in the vertical direction of the seat. Various types of seats have been proposed that are equipped with a lifter mechanism for vertical adjustment that allows for more appropriate adjustment of the height of the seat.

[Problem that the invention attempts to solve]

However, in a vehicle seat that has both the above-mentioned longitudinal slide mechanism and lifter mechanism, the longitudinal slide mechanism and the lifter mechanism are conventionally provided separately, and the adjustment operations thereof are troublesome and complicated, and the operability is poor. Not only is this a problem, but it is also difficult to obtain an appropriate adjustment state, and each mechanism requires a locking means, a spring means, etc., which increases the number of parts and complicates the structure. Therefore, it is necessary to take some measures. In particular, the above-mentioned lifter mechanism adjusts the seat cushion according to the person's physique and preference, or when a small person is seated on the seat cushion, so that the seated person can widen the field of view and easily operate the pedals. It is suitable for use in operating the seat cushion so that the rear part is tilted upward compared to the front part, and when performing such a lifter operation, the seat cushion is moved forward by a slide mechanism, etc. These operations are also carried out, and it is desired that the above-mentioned problems be eliminated by taking these points into consideration.

In view of these circumstances, the present invention enables the seat longitudinal slide mechanism and the lifter mechanism to operate properly and reliably in conjunction with each other using a simple and inexpensive mechanism, thereby greatly improving operability, etc. It is an object of the present invention to provide a vehicle seat which can also be used as a locking means and other component parts.

[Means to solve the problem]

In order to meet such demands, the vehicle seat according to the present invention includes a front-rear sliding mechanism consisting of a lower rail and an upper rail, a locking mechanism that connects and fixes both rails at a predetermined slide adjustment position, and an upper rail attached to the front of the seat. and a lifter mechanism having front and rear link levers that support the seat cushion on the upper rail so as to be able to move up and down. , the other end is pivotally supported on the rear end side of the seat cushion, and the connecting pin on the upper rail side is slidably held in the guide groove in the longitudinal direction of the center, and the front link lever is The front end of the seat cushion is pivotally supported on the front end of the upper rail with the front end of the seat cushion rotatably supported on the front end thereof.

[Effect]

According to the present invention, by one adjustment operation of unlocking the locking mechanism of the longitudinal slide mechanism, the upper rail is moved toward the front of the seat on the lower rail by the biasing force of the spring means, etc., and thereby one end is placed on the lower rail side. The rear link lever, on which the rear link lever is pivoted, is rotated upwards on the seat by the connecting pin on the upper rail side, and as a result, the rear end of the seat cushion is pivoted on the seat cushion, on which the rear link lever is pivoted by the front link lever. The cushion is moved upwardly above the seat centering on the front end of the cushion, and is locked and fixed in that state by locking the locking mechanism. Conversely, when the lock mechanism is unlocked and the upper rail that constitutes the slide mechanism is moved to the rear of the seat against the biasing force of the spring means, the rear link lever is moved by the connecting pin. The seat cushion is rotated toward the bottom of the seat, and as a result, the rear end side of the seat cushion moves downward below the seat around the pivot portion provided by the front link lever.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings. Figures 1 to 3 show an embodiment of a vehicle seat according to the present invention, and these figures only show the support structure at the bottom of the seat cushion 1, which is the main part. .

In these figures, reference numeral 10 denotes a longitudinal slide mechanism disposed in the seat longitudinal direction corresponding to the lower sides of the seat cushion 1 on the floor surface of the vehicle (not shown). A side lower rail 11 is fixed to the floor surface of the vehicle body, and a movable side upper rail 12 is attached to the lower rail 11 so as to be slidable in the front-rear direction of the seat. Reference numeral 13 designates a locking mechanism for connecting and fixing both rails 11 and 12 that make up the slide mechanism 10 at appropriate positions in the seat front and rear directions. A case is shown in which the lock bracket 14 includes a lock bracket 14 having a window 14a, and an operating lever 15 having a lock pawl 15a that is selectively engaged with the locking window 14a located at an arbitrary position of the lock bracket 14 by rotational operation. However, it goes without saying that it is not limited to this.

Further, reference numeral 16 denotes a spring that is stretched between the bracket 17a on the front side of the lower rail 11 and the bracket 17b on the rear side of the upper rail 12, and biases the upper rail 12 toward the front of the seat. Of course, this can be considered.

Now, according to the present invention, in the above configuration,
As is clear from FIGS. 1 to 3, a lifter has front and rear link levers 21 and 22 that support the seat cushion 1 on the upper rail 12 constituting the slide mechanism 10 so as to be able to move up and down in the vertical direction of the seat. A mechanism 20 is provided, and front and rear link levers 21 and 22 in this lifter mechanism 20 are provided.
Among them, the rear link lever 22 is pivoted at one end to the center side of the lower rail 11 and the other end to the rear end side of the seat cushion 1 via pivot shafts 23 and 24, and extends in the longitudinal direction of the center. It is characterized by a structure in which a connecting pin 26 fixed to the upper rail 12 side is slidably held in the formed guide groove 25. Here, the above-mentioned front link lever 21 is formed shorter than the rear link lever 22, and the front end side of the seat cushion 1 is rotatably supported on the upper end side, and the lower end side is pivotably supported on the front end side of the seat cushion 1. Slide mechanism 1
It is pivotally supported on the front end side of the upper rail 12 of 0.

According to such a configuration, as is clear from FIG. 2, when the seat cushion 1 is supported in a substantially horizontal state at its rearmost position, the lock mechanism 13 is provided on the lower rail 11 side. The locking window 1 of the locking bracket 14
By unlocking the operation lever 15 having a locking pawl 15a that is selectively engaged with the seat cushion 4a, and moving the seat forward by the slide mechanism 10 in this state, the seat cushion 1 is slid. The rear end side of the seat cushion 1 can be operated as a lifter in the following manner. That is, when the upper rail 12 moves toward the front of the seat on the lower rail 11 in the slide mechanism 10 by the biasing force of the spring 16,
According to this movement, the connecting pin 26 slides within the guide groove 25 of the rear link lever 22, and thereby rotates toward the top of the seat (counterclockwise in the figure) as shown in FIG. The moving rear link lever 22 causes the rear end side of the seat cushion 1 to move upward. It will be easily understood that during this operation, the spring 16 also acts as a spring means for raising the rear link lever 22 mentioned above. Also, at this time, the pivot point of the front link lever 21 that pivots the front end side of the seat cushion 1 becomes the center of rotation, and the front end side of the seat cushion 1 moves downward relative to the rear end side. I will do it. When the lock mechanism 13 is brought into the locked state in this state, the seat cushion 1
is locked in an inclined position with the rear end facing upward. Note that when the rear end side of the seat cushion 1 is raised, the front link lever 21 moves rearward.

On the other hand, in such a state, the lock mechanism 1
3 is released and the seat is retracted again, in the opposite direction to that described above, as is clear from FIG.
The rear link lever 22 rotates toward the bottom of the seat (clockwise in the figure), and as a result, the rear end side of the seat cushion 1 is moved downward around the pivot portion provided by the front link lever 21. At this time, the pivot portion of the front link lever 21 on the seat cushion 1 side moves forward. Further, by locking the slide adjustment described above at an appropriate position, the lifter adjustment can be performed appropriately and reliably in conjunction with this.

The lifter mechanism 20 allows the seat cushion to be adjusted according to the person's physique and preference, or when a small person is seated on the seat cushion 1, to widen the field of view of the small person and to facilitate pedal operation. 1 can be tilted and adjusted, and when the seat cushion 1 is advanced by the slide mechanism 10, the lifter mechanism 2
0, the rear end side of the seat cushion 1 can be raised, and the front end side can be operated so as to be lowered relative to the rear end side.

According to the above-described configuration, both mechanisms 10 and 20 are operated in conjunction with each other, and the lock mechanism 13, spring 16, etc. are shared.
The total number of component parts is significantly reduced, making it possible to simplify the structure and reduce the overall weight.The number of attachment points for each part is also reduced, making it possible to configure the entire unit as a unit. This configuration also has the advantage that the seat cushion frame can be used in common with a seat or the like having only the slide mechanism 10.

Note that the present invention is not limited to the structure of the embodiment described above, and the shape and structure of each part may be modified and changed as necessary, and the lock mechanism 13 and its operation means described above, as well as It goes without saying that various modifications can be made to the spring means and the like for biasing the upper rail 12 toward the front of the seat in the slide mechanism 10.

[Effect of idea]

As explained above, the vehicle seat according to the present invention includes a locking mechanism that connects and fixes the lower rail and the upper rail at a predetermined slide adjustment position, a front-rear sliding mechanism that has a spring means that biases the upper rail toward the front of the seat, and an upper rail. A lifter mechanism is provided which has front and rear link levers that support the seat cushion in a vertically movable manner on the upper side. The connecting pin on the upper rail side is slidably held in the central longitudinal guide groove, and the front link lever is rotated to the front end side of the seat cushion. Since it is pivoted to the front end of the upper rail in a movable state, the front/rear slide adjustment and lifter adjustment, which conventionally required individual adjustments, can be made in one adjustment, despite the simple and inexpensive structure. It can be easily and appropriately linked and adjusted by operation, and has various practical effects such as being able to double as a locking mechanism, reducing the number of parts, simplifying the structure and reducing weight, etc. .

[Brief explanation of drawings]

The figures show an embodiment of the vehicle seat according to the present invention, in which Fig. 1 is a schematic perspective view showing the main structure, and Figs. 2 and 3 are schematic diagrams for explaining the overall operating state. FIG. In the figure, 1... Seat cushion, 10... Front and rear slide mechanism, 11... Lower rail, 12...
Upper rail, 13...Lock mechanism, 14...
Lock bracket, 14a...locking window, 15...
Operation lever, 15a... Lock claw, 16... Spring, 20... Lifter mechanism, 21... Front link lever, 22... Rear link lever, 23...
... Pivot shaft, 24 ... Pivot shaft, 25 ... Guide groove,
26...Connecting pin.

Claims (1)

[Scope of utility model registration request] a slide mechanism consisting of a lower rail and an upper rail provided in the longitudinal direction of the seat; a locking mechanism for connecting and fixing these rails at a predetermined slide adjustment position; a spring means for biasing the upper rail toward the front of the seat; and a lifter mechanism having front and rear link levers that supports the seat cushion so as to be able to move up and down in the vertical direction of the seat, and of the front and rear link levers in this lifter mechanism, one end of the rear link lever is On the lower rail side, a connecting pin whose other end is pivotally supported on the rear end side of the seat cushion and is slidably held in a guide groove formed in the longitudinal direction of the center thereof is fixed to the upper rail side. A vehicle seat characterized in that the front link lever is pivotally supported on the front end side of the upper rail with the front end side of the seat cushion rotatably supported on the upper end side of the front link lever.