JPH0143943Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to improvements in seat tracks used in automobiles and the like.

(Prior Art) An automobile seat track is used to move the seat in the longitudinal direction and lock it in an optimum position, but from the viewpoint of safety, a minimum value for the locking strength is regulated by law. Then, the general seat adjustment operation (adjusting the position of the seat cushion when driving) and the full-flat operation (the operation of specially moving the seat cushion forward so that the front seat back can be folded almost horizontally) are performed. In a seat track that allows the seat to move, the locking strength at the full flat position may be less than the locking strength at the normal adjustment position.

However, in conventional seat trucks, the general adjustment operation and the operation to shift to full flat can be performed in the same operation, so for example, it is easy to accidentally perform full flat operation during general adjustment.
There was a risk of driving with the seat cushion in the fully flat position (with the seat back up). On the other hand, in order to avoid this danger, the locking strength at the full flat position was increased to the locking strength at the general adjustment position.
In this case, there arises a problem of significantly excessive quality and increased costs.

(Purpose of the invention) The present invention was devised in view of this point, and its purpose is to prevent the above-mentioned dangers caused by running in a fully flat position, and to solve the problem of high costs due to excessive quality. .

(Structure of the invention) The invention that achieves this object includes an upper rail fixed to the seat, a lower rail to which the upper rail is slidably fitted, and a lower bracket on the floor side that supports the front and rear of the lower rail. a general adjustment lock portion is provided on the lower rail along the longitudinal direction, a lock plate capable of engaging with the lock portion is fixed to an operating lever, and the operating lever is rotatably attached to the upper rail; The front lower bracket is provided with a stopper piece that comes into contact with the lock plate during a general adjustment operation and restricts the sliding of the upper rail to the full-flat position, and a full-flat lock tooth that can engage with the lock plate during a full-flat operation, Furthermore, two springs are attached to the operating lever to apply rotational force in the locking direction, one spring force is applied during general adjustment operation, and two spring force is applied during full flat operation.
The device is characterized in that it is constructed so that two spring forces act on each operating lever.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

In FIGS. 1 to 7, 1a and 1b are inner and outer guide rails for guiding the back and forth sliding of the seat (not shown), and the inner and outer guide rails 1a and 1b are seat cushions, respectively. Atsupa rail 2a fixed to
2b, lower rails 3a, 3b into which the upper rails 2a, 2b are slidably fitted, front lower brackets 4a, 4b fixed to the floor supporting the front and rear ends of the lower rails 3a, 3b, and a rear part. It consists of lower brackets 5a and 5b.

The inner guide rail 1a includes a lower rail 3a.
Lock holes 6 are bored at predetermined intervals in the longitudinal direction in the flange on the outer guide rail 1b side, and stoppers are cut and raised in the front lower bracket 4a so as to extend from the lower rail 3a toward the outer guide rail 1b side. The piece 7 and the lock tooth 8 are sequentially provided from the rear end, and a bearing bracket 9 extending toward the outer guide rail 1b is fixed at a required position on the upper surface of the upper rail 2a. A lever shaft 11 of Ikkyu is rotatably supported, and an appropriate notch 12 is cut in the center of the protruding portion of the bearing bracket 9 so that the lever shaft 11 is partially exposed to the outside. A lock plate 13 that can be engaged with the lock hole 6 is fixed to the exposed part of the lever shaft 11 located in the notch 12. Also, a first coil spring 14 is attached to the rear end of the lever shaft 11, one end 14a of the first coil spring 14 is locked to the upper surface of the upper rail 2a, and the other end 14b is attached to the slotted portion of the lever shaft 11. 11
a (or the cam plate 16 described later),
The force of the first coil spring 14 urges the lever shaft 11 to rotate in the direction of arrow X in FIG. 1, thereby constantly applying a force to the lock plate 13 to engage the lock hole 6. Therefore, the operating lever 1
0 in the opposite direction of arrow X, the lock plate 13 is removed from the lock hole 6 and the lock is released. Also, the first coil spring 1 of the lever shaft 11
4, a second coil spring 15 is attached to the lever shaft 11 so that one end 15a and the other end 15b are respectively locked to the upper and lower surfaces of the upper rail 2a. When the operating lever 10 is further rotated in the direction opposite to the arrow X from the unlocked position, the bent portion 16a comes into contact with one end 15b of the second coil spring 15, and the spring 15 A cam plate 16 is fixed adjacent to the cam plate 16, which acts in a direction to reduce the diameter of the cam plate. As a result, the bent portion 16a of the cam plate 16 is not in contact with the one end 15b of the second coil spring 15 in the lock position, and the operating lever 10 is moved in the direction of the arrow X against the biasing force of the first coil spring 14. When the operating lever 10 is rotated in the same direction to the unlocked position, the bent portion 16a approaches one end 15b of the second coil spring 15, and when the operating lever 10 is further rotated in the same direction, the bent portion 16a approaches the one end 15b of the second coil spring 15.
comes into contact with one end 15b of the second coil spring 15, and pushes the one end 15b in the direction in which the diameter of the second coil spring 15 is reduced. After this contact, the operating lever 10 must be rotated against the biasing forces of the first and second coil springs 14 and 15. In addition, the cam plate 16 and lever shaft 1
1 is integrated by welding or fitting other than a perfect circle.

In such a configuration, when performing general seat adjustment operations, pull up the operating lever 10 upwards (in the direction opposite to the arrow X) and adjust the upper rails 2a, 2b.
This is done by letting go of the operating lever 10 after sliding it to an arbitrary position. That is, when the operating lever 10 is pulled upward against the force of the first coil spring 14, the lock plate 13 that has been engaged with the lock hole 6 is disengaged from the lock hole 6, and the lock is released. Therefore, Atsupareru 2
a, 2b can slide on the lower rails 3a, 3b, and after sliding, if you release your hand from the operating lever 10, the lever shaft 11 is automatically moved in the direction of arrow X by the force of the first coil spring 14. The lock plate 13 engages with the lock hole 6 at that position and becomes locked again.

In the above, even if the upper rails 2a, 2b are slid forward as far as possible with respect to the lower rails 3a, 3b, the stopper piece 7 of the lower bracket 4a
Because it protrudes laterally from the lower rail 3a,
The front end surface of the lock plate 13 comes into contact with the stopper piece 7 (see FIG. 6), and further sliding, that is, movement to the full flat position, is prevented.

On the other hand, when operating the seat fully flat, the operating lever 10 is further pulled up in the direction opposite to the arrow X from the unlocked position, and the upper rail 2a,
This is done by letting go of the operating lever 10 after sliding the lower rail 2b to the forwardmost position with respect to the lower rails 3a, 3b. That is, when the operating lever 10 is further pulled up in the direction opposite to the arrow X from the above-mentioned unlocked position, the lock plate 13 rotates to a position where it does not interfere with the stopper piece 7, so that the upper rail 2
a, 2b can slide to the forwardmost position with respect to the lower rails 3a, 3b (this position is set in advance), and when you release your hand from the operating lever 10 at this position, the lock plate 13 moves to the lock tooth 8. is engaged with the locking state (see Fig. 7).

In the above, when the operating lever 10 is pulled further upwards than the unlocked position during general adjustment and the lever shaft 11 is rotated, the bent portion 16a of the cam plate 16 integrated with the lever shaft 11 is bent at one end of the second coil spring 15. 15b, and acts to reduce the diameter of the second coil spring 15.
Therefore, during the general adjustment operation of the seat, only the force of the first coil spring 14 acts on the operating lever 10, but during the full flat operation, the force of the first coil spring 14 and the force of the second coil spring 15 act on the operating lever 10. I will do it. For this reason, the operating force is obviously heavier (larger) during full flat operation than during general adjustment operation, and lever operation is differentiated.

In the embodiment described above, the operating lever 10 and its related mechanisms were provided on the inner guide rail 1a side, but they may be provided on the outer guide rail 1b side. or,
In the embodiment described above, the lock hole 6 is formed in the lower rail 3a to form the lock portion. However, for example, a plate provided with lock teeth or lock holes may be prepared and fixed to the lower rail 3a to form the lock portion. .

(Effects of the invention) As explained above, according to the seat track of the invention, the general seat adjustment operation and the full-flat operation can be clearly distinguished by the magnitude of the operating force of the operating lever, so the full-flat lock position can be changed to the normal seat position. It is safe because there is no risk of treating it as a range of adjustment positions, and it does not result in excessive quality, so there is no problem of high costs.

[Brief explanation of drawings]

Fig. 1 is an overall explanatory view showing the seat track of the present invention, Fig. 2 is a side view of the inner guide rail, Fig. 3 is a partial explanatory view of Fig. 1, and Fig. 4 is A of Fig. 1.
FIG. 5 is a sectional view taken along line BB in FIG. 1, and FIGS. 6 and 7 are explanatory views of the operating state. 1a...Inner guide rail, 1b...Outer guide rail, 2a, 2b...Upper rail, 3a, 3
b...Lower rail, 4a, 4b...Lower bracket,
6... Lock hole, 7... Stopper piece, 8... Lock tooth,
9...Bearing bracket, 10...Operation lever, 11...
lever shaft, 13... lock plate, 14... first coil spring, 15... second coil spring,
16...Cam plate.

Claims (1)

[Scope of utility model registration request] The seat includes an upper rail fixed to the seat, a lower rail into which the upper rail is slidably fitted, and a lower bracket on the floor side that supports the front and rear of the lower rail, and a general adjustment lock portion is attached to the lower rail in the longitudinal direction. A lock plate capable of engaging with the lock portion is fixed to the operating lever, and the operating lever is rotatably attached to the upper rail. A stopper piece that contacts and restricts the sliding of the upper rail to the full-flat position, and a full-flat lock tooth that can engage with the lock plate during full-flat operation are provided, and furthermore, a rotational force is applied to the operating lever in the locking direction. This seat truck is equipped with two springs to act on the operating lever, and one spring force is applied to the operating lever during a general adjustment operation, and two spring forces are applied to the operating lever during a full flat operation.