JPH0628041Y2 - Vehicle seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a vehicle seat with a seat cushion whose position can be adjusted in the front-rear direction.

(Prior Art) As a conventional center-folded sheet whose front-back position can be adjusted, there is, for example, one shown in FIGS. 5 to 6 (Japanese Utility Model Publication No. 57-11580 and Japanese Utility Model Publication No. 60-31547). reference).

In these figures, the seat cushion 1 can be adjusted in position forward and backward by sliding 5 on the floor 9, the seat back 2 has an upper back portion 6 and a lower back portion 7, and the lower back portion 7 is at the rear portion of the seat cushion 1. The lower end is connected by a hinge pin 4, and the upper end is connected by a hinge pin 3 to the lower end of the upper back portion 6. The upper back portion 6 is connected to a vehicle body-side back panel 8 by an adjuster (guide hole) so as to be slidable in the vertical direction.

In the conventional type, when the seat cushion 1 is moved forward, the lower part of the lower back portion 7 of the seat back 2 moves forward as shown in FIG. 6 from the state of FIG. It slides and moves downward, filling the space with the lumbar region of the occupant and allowing a comfortable posture.

(Problems to be solved by the invention) However, in such a conventional one, since the lower back part of the seat back is connected to the seat cushion and the upper back part only by the hinge pins, respectively, the lower back part having a particularly large load distribution force. There was a problem that abnormal noise was generated at the connecting pin portion due to backlash (clearance) and the product strength was reduced.

This invention provides a vehicle seat with less rattling noise by improving a method of supporting an upper end portion of a lower back portion having a large load distribution force in a seat capable of appropriately responding to a posture change of an occupant. The purpose is to solve the above-mentioned problems.

[Means for Solving the Problem] (Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention interlocks with a seat cushion whose position can be adjusted in the longitudinal direction of a vehicle body by a first power slide, and the first power slide. An upper back portion of a seat back whose position can be adjusted in the vertical direction of the vehicle body by a second power slide, and a lower back portion of the seat back in which a rear end and a lower end of the seat cushion are pin-connected and are connected to the vehicle body via a slider. Is.

(Operation) For example, when the user wants to relax, when the switch for the power slide is pressed, the motor rotates in the forward direction to move the upper rail of the first power slide, that is, the seat cushion forward. The lower back portion of the seat back advances together because the lower end is pin-connected to the cushion, and is guided and tilted because it is connected to the vehicle body by a slider. At the same time, the upper back moves downward due to the interlocking of the second power slide, and no gap is created between the upper back and the lower back. The lower back portion to which a load is applied is not only pin-connected to the seat cushion but also slider-connected to the vehicle body, so that the load is shared and play and noise are reduced.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS.

First, the configuration will be described with reference to FIG. The seat cushion 1 has a frame 11, and the frame 11 is coupled to an upper rail 15 of a first power slide 13 which is formed in an upwardly concave arc shape. As shown in FIG. 2, the upper rail 15 has a rack-like toothed end edge extending forward and backward, meshes with the pinion of the motor 17, and rotates forward and backward with respect to the lower rail 19 fixed to the floor 9. It can be slid.

The seat back 2 is divided into an upper back portion 6 and a lower back portion 7, and their end faces are arranged so as to contact each other. In the upper back 6, the frame 21 of the upper back 6 is the seat cushion 1.
Similarly to the above, it is connected to the second power slide 23 and can move in the vertical direction of the vehicle body. That is, the motor 17
A flexible cable 25 is extended from the cable, and the cable 25 is connected to a pinion 27 (see FIG. 3) rotatably supported by the vehicle body-side back panel 8 and is connected to a front rail 29 formed in a rack as in FIG. The frame 21 is fixed,
The front rail 29 can slide vertically with respect to the rear rail 31 fixed to the vehicle body.

The lower back 7 has pins 3 protruding laterally from the frame 33.
5, the pin 35 is fitted in the elongated hole 39 of the vehicle body side fixed slider 37 so as to be slidable up and down.
The lower end of the frame 33 is rotatably connected to the seat cushion frame 11 by a hinge pin 4.

Next, the operation of the above embodiment will be described. In order to make the occupant relax from the state shown in FIG. 3, when a button switch (not shown) is pressed, the motor 17 rotates in the forward direction, and the rack-equipped upper rail 15 meshing with the pinion advances. That is, the first
The power slide 13 advances the frame 11 and the seat cushion 1 integrated with the upper rail 15 forward. Since the lower back portion 7 of the seat back is connected by the pin 4, the lower end of the seat back is moved forward so that the lower end of the seat back is advanced and guided by the slider 37 to be inclined as shown in FIG. On the other hand, the upper back 6
Since the rotation of the motor 17 is transmitted to the second power slide 23 via the flexible wire 25, the second power slide 23 moves downward similarly to the movement of the seat cushion 1, that is, the lower back portion 7. Therefore, there is no gap between the upper back portion 6 and the lower back portion 7, and the occupant does not feel uncomfortable. When returning to the original state, the motor 17 may be rotated in the reverse direction.

Then, the lower back portion 7 to which a load is applied is connected to the seat cushion 1 by the pin 4, and the slider 37 is attached to the vehicle body.
Since it is supported by, there is less play and noise.

The present invention is not limited to the above-mentioned embodiment. For example, the first and second power slides may each have a power source such as a motor, and these may be linked by a controller.

[Effects of the Invention] As described above, the present invention has the configuration as described below.
A seat cushion whose position can be adjusted in the front-rear direction of the vehicle by a power slide, an upper back portion of a seat back whose position can be adjusted in the vertical direction of the vehicle by a second power slide that interlocks with the first power slide, and a rear end and a lower end of the seat cushion. Since the lower back portion of the seat back is pin-connected and is connected to the vehicle body via the slider, the effect of reducing rattling and noise can be obtained.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIGS. 3 and 4 are side views showing a changed state. FIG. 5 and FIG. 6 are side views showing the state of change before and after the conventional one. DESCRIPTION OF SYMBOLS APPEARED IN THE DRAWINGS 1 …… Seat cushion, 4 …… Pin 6 …… Upper back, 7 …… Lower back 13 …… First power slide, 17 …… Motor 23 …… Second power slide 25 …… Flexible wire 37 ... Slider

Claims (1)

[Scope of utility model registration request] 1. A seat cushion whose position can be adjusted in the longitudinal direction of a vehicle body by a first power slide, an upper back portion of a seat back whose position can be adjusted in the vertical direction of a vehicle body by a second power slide which interlocks with the first power slide, and the seat. A vehicle seat having a seat back lower back portion in which a rear end and a lower end of the cushion are pin-connected and are connected to a vehicle body via a slider.