JPH10100757A - Seat height adjustment device - Google Patents

Abstract

(57) [Summary] [Object] To reduce the installation space for components of a seat height adjusting device having a suspension property. [Structure] A rotating shaft (1A) (2
A) A vibration isolator (A) (B) is provided at the axis of (1B) (2B).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat height adjusting device provided in a vehicle seat (seat).

[0002]

2. Description of the Related Art Some seats such as a driver's seat for an automobile are provided with a seat height adjusting device capable of adjusting the height of a seat surface according to the sitting height and preference of a seated person. On the other hand, some seats are provided with a suspension device that elastically supports the seat in order to improve the seating performance of the seat.

There is also disclosed a vehicle having both a seat height adjusting device and a suspension device (for example, Japanese Patent Application Laid-Open No. 61-200040). This has the advantage that the seated person can use the seat height adjustment device and the suspension device properly, and thus can obtain a comfortable seating feeling.

[0004]

Conventional products provided with the above-described seat height adjusting device and suspension device, respectively,
Since the two devices are switched by a clutch, the structure is complicated and the functions of both devices cannot be obtained at the same time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seat height adjusting device which has a simplified structure and can simultaneously obtain a suspension function.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a seat frame upper frame in a vertical direction by rotating a rotary shaft transversely mounted on a vehicle floor side lower frame. In the height adjustment device of the seat moved to, the vibration center of an elastic body that absorbs vibration by torsion is disposed at the axis of the rotation shaft,
Vibration transmitted from the vehicle floor side to the seat side is absorbed by a vibration isolator provided on the rotating shaft.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In the figure, (10) and (11) are lower frames fixed to the vehicle floor side in the front-rear direction, (20).
Reference numeral (21) denotes an upper frame on which a sheet is placed, which is attached to the lower frames (10) and (11) so that the height can be adjusted vertically by a height mechanism described later.

The height mechanism comprises a rear height mechanism for adjusting the rear side of the seat up and down, and a front height mechanism for adjusting the front side of the seat up and down.

Before the illustration, the rear height mechanism is adapted to adjust the height of the seat by rotating the operation handles (5A) and (5B) by the occupant.

The rear height mechanism includes an operation handle (5A) provided on the lower frame (11) and the operation handle (5A).
A) and a pinion gear (4A) integral with the pinion gear (4A), and a sector gear (3A) meshed with the pinion gear (4A). The rear rotating shaft (1A) (2A) (2A) to which the sector gear (3A) is fixed, and the upper frame (20) (21) welded to the rear rotating shaft (1A).
And a link (6A) (6A) having one end pivotally connected to the other end.

The rear rotating shaft (1A) (2A) is a central shaft (1A) for welding the link (6A) (6A).
And the rear vibration isolator (A) on both sides of this central axis (1A)
(A) are divided into end shafts (2A) and (2A) that are connected via the center shaft (1A).
Are concentrically connected via rear vibration isolators (A) and (A) and are rotatably supported by lower frames (10) and (11).

Since the sector gear (3A) is integrally welded to the end shaft (2A) on the lower frame (11) side, the pinion gear (4A) is rotated by the rotational operation force of the operation handle (5A). I do. The rotation of the pinion gear (4A) causes the pinion gear (4A) to rotate.
The sector gear (3A) that meshes with the shaft rotates, and the rear rotating shafts (2A) and (1A) rotate. This rear rotating shaft (2
A) With the rotation of (1A), the links (6A) and (6A) integrated with the central shaft (1A) rotate in the vertical direction to move the rear portions of the upper frames (20) and (21) up and down.

The front height mechanism has substantially the same structure as the rear height mechanism. That is, the operation handle (5B) provided on the lower frame (11) and the operation handle (5B)
A pinion gear (4B) integral with the pinion gear (4B), a sector gear (3B) meshed with the pinion gear (4B), and the sector gear (3B) rotatably mounted on the front portions of the left and right lower frames (10) and (11). ) Is fixed to the front rotating shaft (1B), (2B), (2B), and the front rotating shaft (1B).
Link A (6B) (6B) having a base end welded to B) and a link having one end pivotally connected to the distal end of link A (6B) (6B) and the other end pivotally connected to upper frame (20) (21). B (6B '). Therefore, the front side of the upper frames (20) and (21) is moved up and down by the rotational operation force of the operation handle (5B).

Then, the front rotating shafts (1B), (2B), (2
B) is also composed of a central shaft (1B) formed by dividing one shaft into three parts and end shafts (2B) (2B) similarly to the rear rotating shafts (1A), (2A) and (2A). The end shafts (2B) and (2B) are concentrically connected to the shaft (1B) via front vibration isolators (B) and (B).

The front vibration isolators (B) and (B) and the rear vibration isolators (A) and (A) are configured to have different absorption of vibration from the vehicle floor. That is, both have the same vibration absorption by torsion, but the rear vibration isolator (A) has a structure as shown in FIG. 4 and the front vibration isolator (B) has a structure as shown in FIG.

The rear vibration isolator (A) has a center shaft (1A) connected to the end shafts (2A) and (2A) and has an HS (Shore hardness) of 45.
The elastic body (30) is connected to a center shaft (1A) by a pin (33) and is integrally fixed with a pin (33).
1) and an attachment tube (32) integrally fixed to the end shaft (2A) with a pin (33).

Accordingly, the rear vibration isolator (A) has a structure in which the end shaft (2A) is connected and supported only by the elastic body (30) with respect to the central shaft (1A). In addition to absorbing vibration by torsion, shock vibration can be absorbed by vertical movement.

On the other hand, as shown in FIG. 5, the front vibration isolator (B) includes a connecting pipe (43) for rotatably connecting the center shaft (1B) and the end shaft (2B) to each other, and A vibration-proof rubber (40) made of the same material as the vibration-proof rubber (30) is formed, and the vibration-proof rubber (40) is integrally fixed to both sides of the mounting pipes (41) and (41). (41) and (41) are integrally fixed to the center shaft (1B) and the end shaft (2B) by pins (42) and (42).

Therefore, this front vibration isolator (B) cannot be expected to absorb vibration in the vertical direction due to the connecting pipe (43) connecting the central shaft (1A) and the end (2A). Vibration can be absorbed by the torsion of (40).

Each of the rear vibration isolators (A) and (A) and the front vibration isolators (B) and (B) is a link (6A) () connecting the upper frames (20) and (21) as shown. 6
Lower frame (10) (11) that is outward with respect to B)
It is arranged on the side.

The rear vibration isolator (A) and the front vibration isolator (B) provided on the illustrated lower frame (10) side are connected to the lower frame (10) via end shafts (2A) and (2B). , But may be directly attached to the lower frame (10). In FIGS. 2 and 3, (7A) indicates a brake for preventing the operation handle (5A) from rotating in the reverse direction.

As described above, the front rotating shafts (1B) and (2B) of the front height mechanism, the front vibration isolators (B) and (B), and the rear rotating shafts (1A) and (2A) of the rear height mechanism. By providing the rear vibration isolators (A) and (A), the vibration input from the vehicle floor to the lower frames (10) and (11) is absorbed by the torsion of each of the vibration isolators (A) and (B). The wearing comfort of the seat is improved.

In addition, by making the vibration absorption of the front vibration isolators (B) and (B) different from that of the rear vibration isolators (A) and (A), seat seating and stability are improved. improves.
That is, the front part of the seat, which supports the thighs of the occupant, absorbs the vibration by the torsion of the front vibration isolators (B), (B), and therefore does not move in the vertical direction, so that the size of the occupant is large. Stably supports the thigh. As described above, the rear portion of the seat, which supports the buttocks of the seated occupant, has good stability at the front portion of the seat. Seatability is improved by absorbing shock vibration due to motion. Therefore, vibration applied to the sheet can be effectively absorbed.

[0024]

According to the present invention, the seat height adjusting device has a suspension function by the vibration isolator provided on the rotating shaft of the height adjusting device. Since the vibration isolator is provided on the rotating shaft of the height adjusting device, there is no need to separately provide a seat height adjusting device and a suspension device as in the related art. Therefore, the space required for the vibration proof structure is not required, and a space that can be effectively used below the seat can be obtained, and a structure with a simple structure that does not easily cause a failure or the like can be provided.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a sectional view of FIG. 2;

FIG. 4 is a sectional view of a rear vibration isolator.

FIG. 5 is a sectional view of a front vibration isolator.

[Explanation of symbols]

 A Vibration Isolator B Vibration Isolator 1A Rotating Axis 2A Rotating Axis 1B Rotating Axis 2B Rotating Axis 10 Lower Frame 11 Lower Frame 20 Upper Frame 21 Upper Frame

Claims (5)

[Claims] 1. A seat height adjusting device comprising: a rotating shaft that is transversely mounted on a lower frame on the vehicle floor side, thereby moving the upper frame on the seat side up and down via a link; A vibration isolator made of an elastic material that absorbs vibration by torsion is disposed at an axis of the seat. 2. The rotating shaft comprises a front rotating shaft of a front height mechanism provided on a front side of a lower frame, and a rear rotating shaft of a rear height mechanism provided on a rear side of the lower frame,
The seat height adjusting device according to claim 1, wherein a front vibration isolator is provided on the front rotation shaft, and a rear vibration isolator is provided on the rear rotation shaft. 3. The seat height adjusting device according to claim 1, wherein the vibration isolator is provided outside a link for attaching the upper frame to the rotation shaft. 4. The vibration isolator according to claim 2, wherein the front vibration isolator includes a connecting body that rotatably connects the divided front rotating shafts to each other, and a vibration isolating rubber that integrally connects the divided front rotating shafts. The seat height adjusting device according to the above. 5. The rear vibration isolator is a vibration isolating rubber that integrally connects the divided rear rotation shafts on an axis.
The seat height adjusting device according to the above.