JPH0565376B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a seat slide device that moves an automobile seat in the front and rear directions, and more specifically, a power-type (electrically powered) seat slide device that moves the seat in the front and rear directions by the force of a motor. This invention relates to a seat slide device of formula (2).

(Prior Art) When getting in and out of the rear seat of a two-door car, it is widely practiced to secure a space for getting in and out by folding the seat back of the front seat forward and moving the entire seat forward. In addition, automobiles employing a seat slide device having a mechanism (walk-in mechanism) that automatically moves the entire seat forward when the seat back is folded forward are also becoming popular. However, this applies to cars with a manual seat slide device; in cars with a power seat slide device, you press a switch to drive the motor and seat the seat in the same way as normal seat position adjustment operations. The only option was to move the entire vehicle forward to create more space for boarding and alighting.

(Problem to be solved by the invention) However, since the seat movement in a power-type seat slide device is slow, if this power-type seat slide device is adopted in a two-door car, it will be difficult for passengers to get in and out of the rear seats. There was a problem that the process could not be carried out smoothly.

The present invention was made in view of the above problems, and
The purpose is to realize a seat slide device that is a power type seat slide device but can move the seat forward at high speed when getting on and off the rear seat.

(Means for Solving the Problems) The present invention solves the above problems by slidably fitting an upper rail into a lower rail fixed to the floor side, and attaching a seat frame bracket to the upper rail. A screw bar that is attached movably in the longitudinal direction and is moved in the axial direction by a motor is arranged in parallel with the upper rail, and connects the screw bar and the upper rail, and connects the motor and the lower rail, and The upper rail is configured to be able to be pushed by the screw bar, and is further provided with a locking means for prohibiting relative displacement between the upper rail and the seat frame bracket, so that when the seat is rapidly forwarded, the locking means is configured to be able to move the upper rail. This feature is characterized in that it is configured to be released.

(Function) In the seat slide device of the present invention, the position of the seat can be adjusted in the longitudinal direction by moving the screw bar and the upper rail using the force of the motor. On the other hand, when performing rapid forwarding, the connection between the upper rail and the seat frame bracket can be released by unlocking the locking means. This allows the seat frame bracket to move forward without any restrictions, and therefore the seat to move forward together with the seat frame bracket. This movement is independent of the rotational speed of the motor, so it can be performed at high speed.

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

In FIGS. 1 to 3, 1 is a lower rail that is fixedly installed on the floor side, and 2 is an upper rail that is slidably fitted to the lower rail 1. As shown in FIGS. Lower rail mounting brackets 3 for fixing the lower rail 1 to the floor are fixed to the front and rear lower surfaces of the lower rail 1. Further, a motor mounting bracket 4 is fixed to the lower surface of the intermediate portion of the lower rail 1, and a driving motor 5 is attached to the bracket 4. Upright flanges 4a and 4b at the front and rear of the bracket 4 rotatably support the screw bar 6, and the motor 5
The rotation of the screw bar 6 causes the screw bar 6 to move in the front-rear direction (in the direction of the arrow). FIG. 3 shows an example of a mechanism for converting the rotation of the motor 5 into the movement of the screw bar 6 in the front-back direction.
In this example, a worm 7 is coupled to the output shaft of the motor 5, a worm wheel 8 is meshed with the worm 7, and a thread is cut in the center of the worm wheel 8.
The screw bar 6 is screwed here.
Note that the worm wheel 8 is restricted so that it cannot move in the axial direction. Therefore, when the motor 5 is driven, the worm 7 and the worm wheel 8
rotates, and the screw bar 6 moves in the axial direction (back and forth direction).

Reference numeral 9 denotes an arm bracket fixed to the upper surface of the front part of the upper rail 2 in a state projecting laterally, to which the front end of the screw bar 6 is connected. 10 is an inner rail fixed to the side surface of the upper rail 2, 11 is an outer rail that is slidably fitted to the inner rail 10, and the outer rail 11 has a seat frame that is a bracket for attaching a seat frame or a bracket for attaching a lifter. A frame bracket 12 is fixed. Rollers 13 and steel balls 14 are arranged between the inner rail 10 and the outer rail 11 to ensure smooth sliding between them. Incidentally, rollers 15 and steel balls 16 are also arranged between the lower rail 1 and the upper rail 2, as is well known.

Reference numeral 17 denotes an arm fixed approximately horizontally to the seat frame bracket 12, and a pin 18 is attached to the arm 17.
A lock lever 19 is pivotally mounted so as to be horizontally rotatable. The tip of this lock lever 19 is fitted into a lock hole drilled in the inner rail 10, outer rail 11 and seat frame bracket 12, and the outer rail 11 is connected to the inner rail 10.
In other words, the seat frame bracket 12 is prohibited from sliding with respect to the upper rail 2, and is always urged to rotate in the locking direction by a torsion spring 20 fitted into the pin 18. In addition, the cable 2 is attached to the lock lever 19.
The tip (cable end) 21b of the inner cable 21a in the inner cable 1 is hooked. This cable 2
1 (inner cable 21a) is connected to the lock lever 1 in synchronization with the forward folding of the seat back (not shown).
9 is rotated in the unlocking direction to release the lock, and its outer cable is fixed to a hanging flange on the side of the arm 17. A tension spring 23 is stretched between the seat frame bracket 12 and the lower rail 1, and the tension spring 23 biases the seat frame bracket 12 forward.

Note that normally two sets of the lower rail 1 and the upper rail 2 are prepared for one seat and these are arranged side by side on the floor, but in this embodiment, only one set (on one side) is shown.

Next, the operation of the above embodiment will be explained.

First, under normal use, the lock lever 19
The device is in a locked state. Therefore, if the motor 5 is rotated forward or backward using a switch (not shown), the screw bar 6 moves forward or backward relative to the motor 5, and the screw bar 6 and the upper rail 2 and the seat frame bracket are integrally moved. 12 moves. Therefore, the position of the seat in the longitudinal direction can be adjusted. Next, when it becomes necessary for a passenger to get on or off the rear seat, the seat back is folded forward using a handle or pedal (not shown). As a result, the inner cable 21a within the cable 21 is pulled in, and the lock by the lock lever 19 is released. Therefore, the seat frame bracket 12 is quickly forwarded forward with respect to the upper rail 2 by the force of the tension spring 23 and stopped at the walk-in position.

To return to normal use from the walk-in position, simply raise the seat back and push it back. As a result, the tension on the inner cable 21a of the cable 21 is released, and the lock lever 1
9 is rotated again in the locking direction by the torsion spring 20, and the seat frame bracket 12
When the seat slide device returns to its predetermined position, the lock lever 19 is inserted into the lock hole, and the seat slide device returns to its locked state, that is, its normal operating state.

Note that the present invention is not limited to the above embodiments. For example, it is possible to arrange the seat slide device having the structure shown in FIG. 1 symmetrically and to synchronize the lock levers to obtain a seat slide device with locks on both sides. In addition, the combination of lower rail 1 and upper rail 2 is stacked in two layers, upper and lower,
An operation similar to that of the embodiment described above may also be obtained.

(Effects of the Invention) As explained above, according to the present invention, a seat slide device that can move the seat forward at high speed when getting in and out of the rear seat, although it is a power type seat slide device, has been realized. can.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing essential parts of an embodiment of the present invention, FIG. 2 is a front sectional view of the embodiment of FIG. 1, and FIG.
The figure is an explanatory diagram showing the internal structure of the drive section. 1...Lower rail, 2...Upper rail, 3...Bracket, 4...Motor mounting bracket, 5...Motor, 6...Screw bar, 7...Worm, 8...Worm wheel, 9...Arm bracket, 10...
Inner rail, 11... Outer rail, 12... Seat frame bracket, 13, 15... Roller, 1
4, 16...Steel ball, 17...Arm, 18
...Pin, 19...Lock lever, 20...Torsion spring, 21...Cable, 23...Tension spring.

Claims (1)

[Claims] 1. An upper rail is slidably fitted to a lower rail fixed to the floor side, a seat frame bracket is attached to the upper rail so as to be movable in the longitudinal direction of the upper rail, and a screw bar is moved in the axial direction by a motor. is arranged in parallel with the upper rail to connect the screw bar and the upper rail, and connect the motor and the lower rail so that the upper rail can be pushed by the screw bar,
The seat slide device further comprises a lock means for prohibiting relative displacement between the upper rail and the seat frame bracket, and is configured to release the lock by the lock means when rapidly forwarding the seat. .