JPH02225141A - Seat device for vehicle - Google Patents

Abstract

PURPOSE:To aim at lowering the position of drivers' hips by housing, as an assembly, such driving devices as a seat sliding mechanism, seat lifting mechanism and seat reclining mechanism into a roughly triangular area enclosed by a vehicle body, either of the right and left side surface of the seat sliding mechanism, and a seat cushion. CONSTITUTION:A seating device for vehicle is provided with a seat sliding mechanism A for supporting a seat cushion 1 so that it can be moved back and forth along lower rails 3, and including an electric motor 32, a seat lift mechanism B including an electric motor 41, for raising and lowering the seat cushion 1 in vertical direction, and a seat reclining mechanism C including an electric motor 61, for tilting a seat back back and forth relatively to the seat cushion 1. In this case, this device is so constructed that the electric motors 32, 41, and 61 for driving the mechanisms A, B, and C, respectively, are housed, as an assembly, into a roughly triangular area D enclosed by a vehicle body, either of the right and left side surfaces of the seat sliding mechanism A, and the seat cushion 1.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a vehicle seat device, and in particular,
Each driving device of a vehicle seat device having a seat slide mechanism, a seat lift mechanism, and a reclining mechanism is compactly stored under the seat cushion, thereby improving low hip points.

[Prior Art] In general, front seat devices in automobiles are designed so that the seat cushion can move forward and backward, move up and down, or the seatback can tilt forward and backward, respectively, in order to ensure the optimal control posture of the control equipment. Or it is implemented in combination. Moving the seat cushion back and forth is known as a so-called seat slide mechanism, moving the seat cushion up and down is known as a so-called seat lift mechanism, and tilting the seat back is known as a so-called reclining mechanism. be. Many of these devices were manually operated.

However, in recent years, from the viewpoint of the trend toward higher-end vehicles, vehicle seat devices have become more sophisticated, and the seat slide, seat lift, and reclining functions are all performed electrically in many cases. In this case, the drive devices such as electric motors that act on each function are placed between the bottom of the seat cushion and the vehicle body, specifically, in the space between the center lower part of the seat cushion and the vehicle body, or in the idle space inside the seat back. It was placed.

[Problem to be Solved by the Invention 1] However, according to the above-mentioned conventional vehicle seat device, if each drive device is arranged at the lower part of the seat cushion, especially at the lower center of the seat cushion, the bottom surface of the seat cushion must be designed to be high. As a result, the hip point of the seat system must be high, and therefore,
It is difficult to electrically operate each of the above-mentioned functions in a vehicle seat device having a low hip point, which is a recent trend. In other words, the low hip point vehicle seat system has a height between the vehicle body and the seat cushion that is much lower than usual, so there is sufficient idle space to accommodate the multiple drive devices that operate each of the above functions. This is because there is no space. Regarding the reclining device, when adopting an electric lumbar support or a side support mechanism, the drive device is placed on the side of the seat back, so deciding where to place the drive device becomes a big problem.

Therefore, in view of the above-mentioned circumstances, the present invention was made with the aim of providing an arrangement for housing a drive device in order to enable electrical operation of each function, especially in a seat device for a vehicle with a low hip point. .

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a seat slide mechanism that supports a seat cushion so as to be movable in the longitudinal direction, a seat lift mechanism that raises and lowers a sort cushion in the vertical direction, and a seat cushion. In contrast, in a vehicle seat device equipped with a reclining mechanism that supports a seat back so as to be tiltable in the longitudinal direction, the vehicle body to which the seat slide mechanism is fixed, one of the left and right sides of the seat slide mechanism, and the seat cushion. A vehicle seat device is constructed in which the driving devices of the seat slide mechanism, seat lift mechanism, and reclining mechanism are collectively housed within a substantially triangular portion defined between the two.

[Function] According to the above structure of the present invention, the drive devices of the seat slide mechanism, seat lift mechanism, and reclining mechanism are not located at the lower part of the central part of the seat cushion, but are integrated into the seat cushion or either side of the lower part thereof. Because of this arrangement, it is possible to electrically operate each function of the vehicle seat device without impairing the characteristics of the low hip point, and it also promotes the upgrading of the vehicle seat device with the low hip point.

[Example] Next, an example of the present invention will be described based on the drawings. 1st
4, the seat slide mechanism A1 seat cushion moves the seat cushion l in the front and back direction by shifting the seat cushion l in the vehicle seat device to either the left or right side (the outside side shown). A seat lift mechanism 81 that raises and lowers the seat back and a reclining mechanism C that tilts the seat back in the front-rear direction are stacked one on top of the other in a stepwise manner to form a substantially triangular arrangement. Each mechanism A, B, and C is driven by a drive device A, respectively.
It has B + , B t , and C+. In addition, in the figure, (■) indicates the hip point.

First, the seat slide mechanism A will be explained.

As shown in FIGS. 4 to 6, the upper rail 2.
2 is slidably engaged with the lower rail 3.3 in the longitudinal direction, and the lower rail 3 is connected to both ends thereof with brackets 75.75, and the brackets 75.75 are connected to the cross members 76.76 with bolts 77.77. The cross members 77 and 77 are fixed to the vehicle body 78. As shown in FIGS. 7 and 8, the flange portion 5.5 of the upper rail 2.2 and the flange portions 6, 6 of the lower rail 3 are bent into a substantially U-shape or a substantially U-shape, respectively. A curled portion + 0.10.11.11 with a groove-shaped cross section is formed in the longitudinal direction, and the curled portion 10 is
．． 11 into each other and slider 1 between them.
2.12 is inserted. The slider I2 is made of a resin material of a certain length that fits into the side end portion of the upper rail 2 with a J-shaped or inverted J-shaped cross section. Furthermore, inside the upper rail 2, the upper surface of the curled portion 11.11 of the lower rail 3 is divided into two parts, front and rear, by a pair of stoppers 17a and 17b approximately in the center, and a rod-shaped roller 1 is provided that can be transferred within each range.
3.13 is inserted, and a groove 14 is formed in the upper rail 2 with a bottom surface 2a that the roller 13.13 comes into contact with. The rollers 13 have substantially the same length as the inner groove width of the upper rail 2, and are arranged perpendicularly to both rails 2.3.

As shown in FIGS. 5 and 6, the upper rail 2.
A pair of stoppers 16a and 16b are provided approximately at the center of 2, and stoppers 16 and 16 are provided protruding near both ends. The stoppers 16a and 16b at the center correspond to the stoppers 17a and 17b. Stoppers 17 and 17 are protruded from both ends of the lower rails 3, 3, respectively. Then, the screw shaft 18 is inserted into the lower rail 3 in the longitudinal direction, and both ends of the screw shaft 18 are connected to both ends of the upper rail 2 with brackets 19° 19, respectively. The screw shaft 18 is attached to a nut housing 23 fixed approximately at the center of the lower rail 3 with a bolt 20.
penetrate. The nut housing 23 has a cutout in the bottom surface and both side walls between the stoppers 17a and 17b protruding from the approximate center of the lower rail 3, as shown in FIG.
A substantially rectangular hole 22 is formed, a nut housing 23 is fitted into the hole 22, and the opposing cut end surfaces 3a, 3a of the cutout side wall portions of the lower rail 3 are connected to the ends of the nut housing 23. A cut surface 3b sandwiched between the wall portions 24, 24 and the cut end surfaces 3a, 3a of the lower rail 3.

3b are brought into close contact with the step portions 21, 21 sandwiched between the end walls 24.24 of the nut housing 23, respectively, and plate-shaped projecting portions 25.25 integrally formed at the front and rear of the nut housing 23 are brought into close contact with the bottom surface of the lower rail 3. bolt 20.2
0 and nuts 20a, 20a (see Fig. 8). As shown in FIGS. 1O and 11, the nut housing 23 has an inverted U-shaped recess 27 on its inner surface into which a nut 26 (see FIG. 7), which is screwed onto the screw shaft 18, is rotatably fitted. , a thrust bearing 28.2 fixed within the nut housing 23 with the nut 26 in between.
8, an inverted U-shaped recess 29, 29 into which the two washers sandwiching it loosely fit, and a hole 2 through which the screw shaft 18 passes.
3a and 23a, and the concave portion 27
Semicircular notches 31, 31 into which a worm 30 that engages with the nut 26 is fitted are formed in the opening. The nut 26 has teeth formed on its outer circumferential surface to be screwed into the worm 30, and constitutes a worm wheel.

As shown in FIGS. 7 and 8, the worm 30 is connected to an output shaft 33 of an electric motor 32 that can be driven in forward and reverse rotation as a drive device A, and the output shaft 33 is connected to the nut housing 23. Bolt 20.2 against the bottom
It is supported by bearings 34 that are collinear at 0. The electric motor 32 is electrically connected to a vehicle power source via a suitable switch. As shown in FIG. 4, the output shaft 33 is
A flexible shaft 35 passes through the electric motor 32 and is connected to the end thereof to move the left and right upper rails 2.2 in conjunction with each other.

Next, the seat lift mechanism B will be explained. Figures 1 to 4
As shown in the figure, ring brackets 36 and 36 are respectively placed on the upper surface of the upper rail 2.2 and fixed with bolts or the like. The ring bracket 36.36 has a predetermined length along the longitudinal direction of the upper rail 2.2, and a motor insertion part 37.37 bent into a groove shape is formed at both ends of one (outside side) of the ring bracket 36.36. The bottom of the groove of the motor insertion portion 37.37 is made to protrude upward and raised, and bolt insertion holes are formed approximately in the center of the raised fixing portion 38.38.

Drive device B+, B! An electric motor 41.41 that can be driven in forward and reverse rotation is inserted into the motor insertion portion 37.3.
7, one end of each is inserted and placed on the fixed part 38.38, and the bolt 40.40 passing through the bolt insertion hole is inserted from the bracket 39.39 fixed to each motor housing by welding or the like to the respective seat. It is fixed to the plate 36 in a serial arrangement. Furthermore, a gear housing 42.42 is integrally connected to the motor housing of the electric motor 41.41.
is provided, and in its gear housing 42.42 a t-arm wheel 44.44 meshing with a worm formed on the output shaft 43.43 of the electric motor 41.41 is connected to the shaft 45.42.
45, each of which is rotatably supported. A gear 46.46 is attached to the worm wheel 44.44 coaxially with a shaft 45.45, and a gear 47.4 meshes with the gear 45.45.
7 will be provided. The gear 47.47 is connected to the gear housing 42.
42 and the bracket 48 connected to the seat plate 36, 36.
The screw shaft 49 is rotatably supported at one end of the screw shaft 49. The screw shafts 49, 49 are arranged in a straight line along the upper rail 2, and are connected to yoke-shaped links 51, 51 that rotatably support nuts 50, 50 that are screwed into each screw shaft at one end.

At the other end of link 51 and 51, respectively, link 52°52
One end of the link 52.52 is rotatably connected, and the other end of the link 52.52 is fixedly connected by welding or the like to an interlocking rod 53.53 rotatably supported by the seat plate 36.36. Interlocking rod 53.
Links 54 and 54 are welded and connected at predetermined angles to both ends of the 53, and a link 55 is connected to the front link 54, and a seat frame 56 is connected to the link 55 and the rear link 54, respectively. Rotatably connected.

The inner side seat plate 36 has the link 54.
The same links 57 and 55 as 55 are rotatably supported, and the links 57 and 58 are each connected to the interlocking rod 5.
3.53, and the left and right seat frames 56.56 can of course be moved up and down simultaneously in conjunction with each other via interlocking rods 53.53. In addition, the seat frame 56
．． A seat pan 59 is placed on 56 and fixed with bolts or the like.

Next, the reclining mechanism C will be explained.

As shown in FIGS. 1 to 4, the seat frame 56
．． A base plate 60.60 is fixed to the rear end of the back arm 6.
1.61 are each pivotably supported. The back arm 61 has a so-called Taumel mechanism, in which inner teeth 62 and outer teeth 63, which have a slight difference in the number of teeth, mesh eccentrically, and the inner circumference! When I62 is rotated, the center of the outer tooth 63 moves around the center of the inner tooth 62, and a mechanism that gradually tilts the back arm 61 integrally formed with the outer tooth 63 allows a reclining operation. .

In order to rotate the shaft 64 provided at the center of the outer tooth 63, a reclining gear 65 is attached to the shaft 64 on one base plate 60 (outside side) as shown in FIG. An electric motor 66 that can be driven in forward and reverse rotation as a CI is fixed to a base plate 60, a worm wheel 68 is meshed with a worm 67 formed on its output shaft, and a small gear 69 is connected coaxially with the worm wheel 68 to a gear housing 70. The large gear 7 is pivotally supported by the pinion gear 69 and meshes with the small gear 69! is pivotally supported by a housing 70, a pinion 72 is coaxially supported by the base plate 60 coaxially with the large gear 71, and the pinion 72 is meshed with a reclining gear 65.

A recess 73 is formed in the rear side surface of the seat pan 59, and the electric motor 66 is housed in the recess 73.

In FIG. 1, reference numeral 74 denotes an interlocking rod, which is used to rotatably connect the shafts 64 and 64 of the reclining mechanism C having a bilaterally symmetrical structure.

Further, a seat back is attached between the left and right back arms 61, 61.

Note that the drive devices A r , B + , B t
, C+ are electrically connected to the vehicle power supply via switches that can start the rotation in forward and reverse directions.

Thus, the present invention provides the above-mentioned portion within a substantially triangular area defined between the vehicle body 78 to which the seat slide mechanism A is fixed, one of the left and right side surfaces of the seat slide mechanism A, and the seat cushion l. The seat slide mechanism A1, the seat lift mechanism B, and the reclining mechanism C are compactly housed in each driving device A, BB*, and Ct.

To explain the operation of the above embodiment, the seat slide mechanism A
In this case, when the switch of the electric motor 32 is operated to rotate the output shaft 33, the worm 30 rotates and the nut 26 rotates within the nut housing 23, and the nut 26 cannot move within the nut housing 23. Therefore, the screw shaft 18 moves in the axial direction, and thus the upper rail 2 moves in the longitudinal direction. In this way, the left and right upper rails 2 are connected to each other via the shaft 35 by the electric motor 32 of
, 2 move simultaneously. Therefore, by selecting forward or reverse rotation of the electric motor 32 and driving each for a desired time, the upper rail 2.degree. 2 can be moved forward or backward as desired. As shown in FIG. 8, when the upper rail 2.2 moves on the lower rail 3.3, the roller 13 is supported by the upper surface of the lower rail 3 by the curled portion 11.11, and When the upper rail 2 is pushed or pulled in the longitudinal direction either forward or backward, it slides smoothly with a light force through the rollers 13, and the rollers 13 comes into contact with stoppers 16 and 17 and stops.

Next, the seat lift mechanism B is operated by an electric motor 41.41.
When the rotation is started by operating the switches individually or both at the same time, the output shaft 43 and the worm wheel 44
, screw shaft 49 via shaft 45 and gears 46, 47
rotates, and as shown in FIG. 13, the nut 50 screwed onto the screw shaft 49 moves in the axial direction of the screw shaft 49, and the link 51 integrated with the nut 50 moves, causing the links 52, 54 to move. .55 respectively to raise and lower the seat cushion 1. Therefore, the seat cushion 1 can be raised or lowered at the same time.

In addition, when the reclining mechanism C starts rotating by operating the switch of the electric motor 66, in FIG.
The small gear 69 rotates via the worm 67 and the worm wheel 68, the large gear 71 meshing with the six small gears rotates, the pinion 72 rotates, and the reclining gear 65 rotates, so that the shaft 64 rotates and the outer periphery is rotated. The teeth 63 rotate, and in FIG. 1, the inner teeth 6 mesh with the outer teeth 63.
The back arm 6I, which is integrated with 2, tilts in the direction in which it is operated, either forward or backward, so when the switch is turned off at the appropriate position,
In this state, the back arm 61 is fixed. In conjunction with the movement of this reclining mechanism C, the shafts 64 and 64
The left and right back arms 61
．． 61 are fixed at the same inclination angle.

[Effects of the Invention] According to the invention described above, there is a seat slide mechanism that supports the seat cushion so as to be movable in the longitudinal direction, a seat lift mechanism that raises and lowers the seat cushion in the vertical direction, and a seat back that moves the seat back with respect to the seat cushion. In a vehicle seat device equipped with a reclining mechanism that supports tilting in a direction, a seat is defined between a vehicle body to which the seat slide mechanism is fixed, one of the left and right sides of the seat slide mechanism, and a seat cushion. Since the drive devices for the seat slide mechanism, seat lift mechanism, and reclining mechanism are all housed in the approximately triangular part, the drive devices for each of the mechanisms can be moved toward either the left or right side of the seat system, whichever you prefer. Therefore, the central lower part of the seat cushion becomes an idle space, so each of the mechanisms mentioned above can be electrically operated without sacrificing the characteristics of the low hip point. It can be easily upgraded.

[Brief explanation of the drawing]

Fig. 1 is a side view, Fig. 2 (A) is a sectional view taken along line C-C in Fig. 4, Fig. 2 (B) is a sectional view taken along line C-C in Fig. 4, and Fig. 3 is a plan view of main parts. Fig. 4 is a plan view of the seat slide mechanism, Fig. 5 is a sectional view taken along line C-C in Fig. 4 showing the configuration of the seat slide mechanism, Fig. 6 is a sectional view taken along line C-C in Fig. 4, and Fig. 7 is a sectional view taken along line C-C in Fig. 4. Figure 4C
8 is a sectional view taken along the line C-C of FIG. 4, FIG. 9 is a partial perspective view, FIG. 10 is a sectional view taken along the line C-C of FIG.
The figure is a sectional view taken along the line CC in FIG. 4, FIG. 12 is a sectional view showing the main part of the drive structure of the reclining mechanism, and FIG. 13 is an explanatory diagram of the operation of the seat lift mechanism. A... Seat slide mechanism, B... Seat lift mechanism, C... Reclining mechanism, D... Substantially triangular part, A + , B + , B t , CI...
Drive device, 1... Seat cushion, 2... Upper rail, 3... Lower rail, 18... Screw shaft, 26... Nut, 32... Electric motor (to the drive device, 41 ...Electric motor (drive device B+, B
y), 49...Screw shaft, 50...Nut, 5
1, 52, 54, 55, 57.58... link, 56
...Seat frame, 60...Base plate, 6
1...Back arm, 66...Electric motor (drive device C,), 78...Vehicle body Fig. 7 Q Fig. 8

Claims (1)

[Claims] (1) Equipped with a seat slide mechanism that supports the seat cushion so that it can move forward and backward, a seat lift mechanism that raises and lowers the seat cushion up and down, and a reclining mechanism that supports the seat back so that it can tilt forward and backward relative to the seat cushion. In the vehicle seat device, the seat slide mechanism is provided within a substantially triangular portion defined between the vehicle body to which the seat slide mechanism is fixed, one of the left and right side surfaces of the seat slide mechanism, and the seat cushion. A vehicle seat device characterized in that each drive device of a seat lift mechanism and a reclining mechanism is housed together.