JPH0645841U - Link support structure of seat lifter mechanism - Google Patents

Abstract

(57) [Summary] [Object] To provide a link support structure of a seat lifter mechanism for the purpose of integration with a seat slide mechanism using an upper rail having an inverted T-shaped cross section. In a seat slide mechanism using an upper rail 5 having a substantially inverted T-shaped cross section that engages a lower rail 6 fixed to a vehicle body, a front side connecting an inner side and an outer side to a standing wall portion of the upper rail 5. And the rear connecting rods 12 and 13 are rotatably pivotally coupled, at least the rearward connecting rod 12 is pivotally coupled to the doubly supported link 14, and the doubly supported link 14 is pivotally coupled to the side bracket 17. The base plate 19 is connected and fixed to the side bracket 17, and the leg bracket required for the conventional double-supported link support structure is omitted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a link support structure for a seat lifter mechanism in a vehicle seat device.

[0002]

[Prior art]

 Many seat devices for automobiles are equipped with a seat lifter mechanism that allows the seat cushion to be adjusted as a whole or independently in the front and rear direction so as to ensure an optimal driving posture of passengers.

In a conventional seat lifter mechanism, as shown in FIG. 4, links 2 and 2 are axially attached to a leg bracket 1 having a substantially inverted U-shaped cross section by a connecting rod 3 in a double-sided manner. The shafts 2 and 2 are pivotally attached to the side bracket 4 on which the seat cushion is mounted by both ends. Therefore, the load applied from the seat cushion to the side brackets 4 is supported by the leg brackets 1 on both sides, and there is an advantage that the support rigidity can be significantly increased.

In FIG. 4, the leg bracket 1 is fixed to an upper rail 5 which constitutes a seat slide mechanism. The upper rail 5 engages with the lower rail 6 slidably in the longitudinal direction, and the lower rail 6 is fixed to the vehicle body.

As described above, when the seat slide mechanism and the seat lifter mechanism are combined, a structure of simply stacking on the upper rail 5 is adopted. This is because originally, the seat slide mechanism and the seat lifter mechanism were separately manufactured, and the seat slide mechanism and the seat lifter mechanism were not integrated. However, recently, as proposals have been made to integrate, rationalize, and reduce the weight of each part of the vehicle, there is a tendency to review the parts to be mounted on the vehicle, and the seat slide mechanism and the seat lifter mechanism are being reviewed. Integrated production is contemplated.

[0006]

[Problems to be solved by the device]

 By the way, recently, as shown in FIG. 5, an upper rail 5 of a seat slide mechanism having a T-shaped cross section has been provided. The upper rail 5 having a substantially inverted T-shaped cross section engages with the lower rail 6 in an inverted T-shape. Therefore, if the standing wall portion 5a protruding vertically upward from the lower rail 6 is used as a leg bracket, the seat slide mechanism is formed. Can be integrated with the seat lifter mechanism, which can be expected to streamline parts and reduce weight.

However, when the link 2 is connected to the standing wall portion 5a of the upper rail 5 having the T-shaped cross section, the above-mentioned double-supported type link cannot be used. Therefore, the links 2 are all cantilevered, which causes a drawback that lateral swinging is likely to occur and rigidity becomes low.

Therefore, the present invention provides a link support structure of a seat lifter mechanism for the purpose of integration with a seat slide mechanism using an upper rail having a T-shaped cross section.

[0009]

[Means for Solving the Problems]

 The link support structure of the seat lifter mechanism according to the present invention is a seat slide mechanism using an upper rail having a substantially inverted T-shaped cross section that engages with a lower rail fixed to a vehicle body. The front and rear connecting rods that connect the outer side and the outer side are pivotally connected to each other so that at least the connecting rods on the rear side of the connecting rods are connected to each other, and the side brackets are attached to the both-supporting links. The base plate is connected and fixed to the side brackets.

[0010]

[Action]

 Since the connecting rod is pivotally supported on the standing wall of the upper rail and the both-end link is axially attached to the connecting rod, the supporting rigidity is improved, and the conventional leg bracket required for using the both-end link is omitted. To enable.

[0011]

【Example】

 An embodiment of this invention will be described below with reference to the drawings. FIG. 1 is a side view showing a state in which a seat lifter mechanism is placed on a seat slide mechanism, and FIGS. 2 and 3 are partially longitudinal rear views showing a conventional leg bracket. As shown in the figure, a pair of left and right lower rails 6 (inner side and outer side) fixed to the vehicle body are engaged with upper rails 5 having a substantially inverted T-shaped cross section having vertical wall portions 5a so as to be movable in the longitudinal direction. A seat slide mechanism is formed.

In the vicinity of both ends of the upper rail 5, supporting portions 10 and 10 integrally formed with a motor bracket 28, which will be described later, are fixedly connected to the standing wall portion 5a, and the standing wall portion 5a and the supporting portion 10 are connected to the standing wall portion 5a. , 10 are provided with connecting rods 12, 13 rotatably through the shafts 11, 11, respectively. That is, the structure of the floor of the vehicle body is high near the center box and lower on the door side, so that the support portion 10 is provided on the outer side in order to horizontally hold the seat cushion.

One ends of the links 14, 15 are integrally fixed to the connecting rods 12, 13 by welding or the like, and one end of the auxiliary link 16 is further rotated at the other end of the front link 15. It is connected by pivoting as much as possible. Side brackets 17 and 18 are pivotally attached to the other ends of the link 14 and the auxiliary link 16, respectively. A base plate 19 is fixedly connected to the side brackets 17 and 18.

The rear link 14 is a double-sided link, and is arranged in a state of sliding contact with the inside of the side bracket 17 having a substantially U-shaped cross section. The front side link 15 and the auxiliary link 16 may be both-end supported, but a cantilever is sufficient because the load is less than the rear side. Therefore, the side bracket 18 has a substantially L-shaped cross section, not a U-shaped cross section. The links 14 and 15 may be arranged so as to be in sliding contact with the inner surface of the standing wall portion 5a of the upper rail 5.

The base plate 19 is a member for fixing the seat pan 20 for mounting the seat cushion, and has an arm 22 for tiltably supporting the seat back. The arm 22 is rotatably connected to the base plate 19 by a hinge 23, and via a reduction gear mechanism 24 that rotationally drives the hinge 23, the interlocking rod 25 allows the left and right arms 22, 22 to simultaneously tilt and adjust in the front-rear direction. Have. Reference numeral 26 is a power unit having a motor for rotating the hinge 23.

In order to rotate the connecting rods 12 and 13, as shown in FIG. 3, a power unit 27 is mounted on the motor bracket 28 inside the outer rail 5 on the outer side, and is fixedly mounted. As shown in FIG. 1, arms 31 and 31 connected to nut blocks 30 and 30 engaging with the screw shafts of a pair of front and rear motors 29 fixed on the motor bracket 28 are welded to the connecting rods 12 and 13. It is pivotally connected to the levers 32, 32 which are pivotally fixed by means such as.

Therefore, when the screw shaft rotates about the axial center, the nut blocks 30, 30 move in the axial direction of the screw shaft to push and pull the arms 31, 31, and the lever 32 rotates the connecting rods 12, 13 about the axial center. By moving, the links 14, 15 and 16 rotate and the base plate 19 moves up and down. Since the pair of front and rear motors 29 are provided on the motor bracket 28 so as to face each other, the base plate 19 can be raised and lowered independently of the front and rear of the seat cushion.

Thus, on the rear side of the seat lifter mechanism, the both-end support link 14 is connected to the connecting rod 12 pivotally supported so as to be orthogonal to the standing wall portion 5 a of the upper rail 5, and the link 15 has a cross section. Since the U-shaped side bracket 17 is rotatably connected to the shaft, even if the conventional leg bracket is omitted, the seat slide mechanism and the seat lifter mechanism, which have high rigidity against left and right swing, can be integrated. Can be achieved.

[0019]

[Effect of device]

 According to the present invention described above, since the connecting rod is supported by the upper rails on the inner side and the outer side, the connecting rod itself is substantially in a double-supported state, and the upper rail has a substantially inverted T-shaped cross section. Even when the seat lifter is placed on top, the supporting rigidity can be significantly increased.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a partially longitudinal rear view taken along the line AA of FIG.

FIG. 3 is a partial vertical cross-sectional rear view taken along the line BB of FIG.

FIG. 4 is a vertical cross-sectional view showing a conventional link support structure.

FIG. 5 is a vertical cross-sectional view showing a main part of a seat slide mechanism using an upper rail having a substantially inverted T-shaped cross section.

[Explanation of symbols]

 5 ... Upper rail 5a ... Standing wall part 6 ... Lower rail 10 ... Support part 11 ... Shaft 12, 13 ... Connecting rod 14, 15, 16 ... Link 17, 18 ... Side bracket 19 ... Base plate

Claims (1)

[Scope of utility model registration request] 1. A seat slide mechanism using an upper rail having a substantially inverted T-shaped cross section that engages a lower rail fixed to a vehicle body, and a front wall connecting an inner side and an outer side to a standing wall portion of the upper rail. The rear connecting rod is rotatably pivotally connected, at least the rear connecting rod is pivotally connected to the doubly supported link, the side bracket is pivotally connected to the doubly supported link, and the base plate is attached to the side bracket. A link support structure for a seat lifter mechanism, characterized by being connected and fixed.