JPH0513841U - Power seat tilt mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the space between the body floor and the seat cushion becomes narrower in the trend toward lower vehicle height, the original performance of the seat, such as the riding comfort, is not impaired, and the gearbox, motor, etc. The tilt mechanism component of the power seat can be arranged in the space. [Structure] An inner rail that is slidably provided and an outer rail that slides in pairs with the inner rail are arranged, and one of the inner rail and the outer rail is provided with a fin having a vertical wall integral with the rail. At the same time, a gear box is attached to the inside of the fin so that the fin serves as a cover, and one end of the rod that serves as a rotation center at the time of tilt is supported by the fin or the gear box and the other end of the rod is integrated with the other rail. It is characterized in that it is supported by small fins in the shape of a vertical wall, and the output of the drive motor mounted on one rail side is transmitted to the gear box by a torque cable.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of an automobile power seat mechanism product, and more particularly to an improvement of a power seat tilt mechanism.

[0002]

[Prior Art]

 Conventionally, the gearbox and drive motors that make up the tilt mechanism of the power seat are arranged so as to fit between the seat cushion and the body floor of the vehicle through brackets attached to the slide rails.

[0003] Recently, automobiles tend to be lower in height, the seating position is lowered, and members for increasing body rigidity are increased in size to improve safety, resulting in a space between a seat cushion and a body floor. Is becoming narrower.

The conventional technique will be described with reference to the drawings. FIGS. 4 and 5 show examples of conventional power seat mechanisms (power slide, front tilt, rear tilt, reclining). In the example of FIG. 4, the tilting motors are attached to the slide rail via the attachment brackets 31, 32, 33. In FIG. 4, 34 is a slide motor gear, 35 is a front tilt motor gear, and 36 is a rear tilt motor gear.

In the example of FIG. 5, the mechanism driving motors are arranged so as to fit under the seat cushion, but a large space that does not interfere with the body or the seat cushion is required. In FIG. 5, 37 is a slide motor gear, and 38 is a rear tilt motor gear.

FIG. 6 shows the relationship between the seat sitting position and the body. When the vehicle height of the automobile becomes low, the clearance (space) between the seat cushion 39 and the body floor 40 or the cross member 41 becomes narrow. In FIG. 6, 42 is a body ceiling, and 43 is a resin cover.

[0007]

[Problems to be solved by the device]

 In the example of FIG. 4, there is a problem that the structure on the rail (in particular, the outer rail) is large and the number of parts is large.

The mechanism layout as shown in FIG. 4 requires a large resin cover 43 as shown in FIG. 6 to hide the motors and operating parts, which is a design problem.

As shown in FIG. 5, when a large space that does not interfere with the body or the seat cushion is required, when the vehicle height tends to be low, the riding comfort, which is the original performance of the seat, is not impaired. There is a problem that it becomes difficult to arrange the gearbox and drive motor.

The present invention has been made in view of the above circumstances. Even if the space between the body floor and the seat cushion is narrowed in the tendency of heightening the vehicle height, the ride comfort, which is the original performance of the seat, can be maintained. It is an object of the present invention to provide a tilt mechanism for a power seat, which allows a gear box, a drive motor, and the like to be arranged in the space without damaging the number of parts, and has a good design.

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is provided with a slidable inner rail and an outer rail that slides in pair with the inner rail, and one rail of the inner rail and the outer rail is integrated with the rail. Of the vertical wall, the gear box is attached to the inside of the fin so that the fin serves as a cover, and the fin or the gear box supports one end of the rod that serves as the center of rotation during tilting and the rod. The other end is supported by a vertical wall-shaped small fin integrated with the other rail, and the output of the drive motor mounted on the one rail side is transmitted to the gear box by a torque cable. There is.

[0012]

[Action]

 With the above configuration, no mechanical component is mounted on the outer rail that is paired with the inner rail, and a fin that is used only for rotationally supporting the tilt rod is integrally formed. Therefore, small fins are sufficient, and since there are no protrusions, it is possible to flexibly meet the design requirements of the seat.

Since the cover (lid) of the gear box is replaced by the fins of the rail, the number of parts can be reduced and the weight can be reduced.

When assembling a gear or the like to another bracket, high assembling accuracy is required. However, if the hole position and the like are determined by the same part, the assembling can be carried out accurately and easily.

Since the drive motor can be freely arranged within the bendable range of the torque cable, it is possible to effectively use the narrow space between the seat cushion and the body floor.

[0016]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, the inner rail 1 is made of extruded material of light alloy such as aluminum. A vertical wall-shaped fin 2 is integrally formed with this extruded material.

A gearbox 3 for a tilt mechanism is attached to the fin 2, and when it comes out of the gearbox 3, a spur gear 4 is meshed with a sector gear 6 welded to a rod 5. The seat cushion is moved up and down by rotating the rod 5 by the rotational force from the gear box 3.

The gear box 3 is mounted on the inner side (seat center side) of either one of the inner rail 1 and the outer rail 7 (see FIG. 2) (inner rail in this embodiment), but the other rail (the present embodiment). In the example, the outer rail may be formed by integrally forming small (low) small fins 8 in the shape of a vertical wall for the rotation support of the front and rear tilt rods (two).

When the gearbox 3 is attached to the fins 2 of the inner rail 1, the fins 2 themselves are used for the cover (lid) of the gearbox 3.

Since the gear box 3 and the rod 5 are attached to the fins 2 on the same rail (inner rail 1), the meshing pitch of the spur gear 4 can be easily positioned.

The casing of the gear box 3 may have a boss (projection) and be fitted into a location hole formed in the fin 2 of the inner rail 1. Further, the bearing portion for the rod 5 may be integrally formed with the gear box 3.

The power of the gear box 3 and the drive motors 9 is connected by a torque cable 10. Although the gearbox 3 and the drive motor 9 have been described with respect to the front tilt mechanism, the same applies to the rear tilt mechanism, and each component of the rear tilt mechanism is the same as the component of the front tilt mechanism. Dashes (for example, 3'and 9 ') are attached to the reference numerals, and duplicate description is omitted.

Next, the operation and the like will be further described. In FIG. 1, when the spur gear 4 of the gear box 3 rotates, the sector gear 6 receives power and rotates around the rotation center of the rod 5. At this time, since the sector gear 6 is welded to the rod 5, the rod 5 also rotates. When the rod 5 rotates, the arm 12 welded to the rod 5 rotates about the rod rotation center, and the end of the arm 12 is rotatably caulked (or bolted) via a link 13. A rotatably crimped (or bolted) stay 14 moves up and down according to the movement of the rod 5 in the respective rotation directions. Since the seat cushion is attached to the stay 14, it serves as a tilt mechanism that moves up and down by the rotation of the spur gear 4 of the gear box 3.

In FIG. 2, on the outer rail 7 on the side that is paired with the inner rail 1, a mechanical component is not attached, and a small fin 8 used only for rotationally supporting the tilt rod is integrally formed. ing. Therefore, the small fin 8 may have a small (low) vertical wall shape, and since it has no protrusions, it can flexibly meet the design requirements for the seat.

Since the cover (lid) of the gear box 3 is substituted by the fins 2 of the inner rail 1, the number of parts can be reduced and the weight can be reduced.

A high assembling accuracy is required for meshing the gears assembled to the different brackets, but if the hole positions and the like are determined by the same parts, they can be assembled relatively easily.

If the casing of the gear box 3 has a boss (projection) and is fitted in a location hole formed in the fin 2 of the inner rail 1, the assembling property becomes better.

If the bearing portion for the rod 5 is formed integrally with the gear box 3, the assembling property will be further improved.

Since the output of the drive motor 9 is transmitted to the gear box 3 by the torque cable 10, the drive motor 9 can be freely arranged within the range in which the torque cable 10 can be bent. The narrow space can be effectively used.

FIG. 3 shows an example of a seat design that is possible when the present invention is implemented. As shown in FIG. 2, since the vertical wall-shaped fins 8 on the outer rail 7 are low and small, and the mechanical parts are attached to the minimum, a large resin cover as shown in FIG. 6 of the prior art is used. It is not necessary and it is easy to meet the furniture-like design requirements. In FIG. 3, 15 is a seat cushion, 16 is a cross member, and 17 is an operation part.

[0031]

[Effect of the device]

 As described above, according to the present invention, even if the space between the body floor and the seat cushion is narrowed in the tendency of heightening the vehicle height, the gearbox and the A drive motor or the like can be arranged in the space.

Further, the number of parts can be reduced, the weight can be reduced, and the assemblability can be improved. Further, the design can be good.

[Brief description of drawings]

FIG. 1 is a perspective view of an inner rail assembly according to an embodiment of the present invention.

FIG. 2 is a side view of an outer rail assembly according to an embodiment of the present invention.

FIG. 3 is a side view showing a state in which an embodiment according to the present invention is incorporated in an automobile seat.

FIG. 4 is an exploded perspective view of a conventional outer rail assembly.

FIG. 5 is a perspective view of another prior art power seat mechanism section.

FIG. 6 is a side view showing a state in which the example of FIG. 4 is incorporated in an automobile seat.

[Explanation of symbols]

 1 Inner rail 2 Fins 3 Gear box 5 Rod 7 Outer rail 8 Small fins 9 Drive motor 10 Torque cable

Claims (1)

[Scope of utility model registration request] 1. An inner rail that is slidably provided and an outer rail that slides in pair with the inner rail are disposed, and one of the inner rail and the outer rail is a fin having a vertical wall shape integrated with the rail. And a gearbox is attached to the fin so that the fin serves as a cover, and the fin or the gearbox supports one end of the rod that serves as the center of rotation during tilting and the other end of the rod serves as the other rail. A tilt mechanism for a power seat characterized in that the output of a drive motor mounted on one rail side is transmitted to a gearbox by being supported by an integral vertical wall-shaped small fin.